125876 + Interview Questions in General QA

1.	The range of focal length of an eye lens is………………….. A) 0 to ∝ B) 2.25 to 2.50 cm C) 2.27 to 2.50 cm D) 0 to 25
Answer» C) 2.27 to 2.50 cm

Discussion

2.	Mention the position where the image is focused in the eye of a person having Hypermetropia.
Answer» The image of an object is focused behind the retina in the eye of a person having Hypermetropia. Hypermetropia is the defect of vision due to which a person is not able to see the nearby objects clearly. It is caused (i) Due to the low converging power of the lens (ii) Due to eye-ball being too short. Hence the image of nearby objects is formed behind the retina due to which the eye cannot see the nearby objects clearly.

2.

Mention the position where the image is focused in the eye of a person having Hypermetropia.

Answer»

The image of an object is focused behind the retina in the eye of a person having Hypermetropia.

Hypermetropia is the defect of vision due to which a person is not able to see the nearby objects clearly. It is caused

(i) Due to the low converging power of the lens

(ii) Due to eye-ball being too short.

Hence the image of nearby objects is formed behind the retina due to which the eye cannot see the nearby objects clearly.

Discussion

3.	The power of a lens is + 1.5 D. Name the type of defects vision that can be corrected by using this lens. Find the focal length of the lens.
Answer» Power of a lens is = P = + 1.5 D. Since power is positive hence the lens used is a convex lens. Types of defects vision that can be corrected by using this lens Hypermetropia and presbyopia. A person suffering from any of these defects is not able to see the nearby objects clearly. The purpose of the convex lens is to increase the converging power of the lens and help to form the image of nearby objects on the retina. Focal length = f f = 1/P (in meters) = 1/1.5 m = 0.667 m

3.

The power of a lens is + 1.5 D. Name the type of defects vision that can be corrected by using this lens. Find the focal length of the lens.

Answer»

Power of a lens is = P = + 1.5 D.

Since power is positive hence the lens used is a convex lens.

Types of defects vision that can be corrected by using this lens Hypermetropia and presbyopia.

A person suffering from any of these defects is not able to see the nearby objects clearly.

The purpose of the convex lens is to increase the converging power of the lens and help to form the image of nearby objects on the retina.

Focal length = f

f = 1/P (in meters)

= 1/1.5 m

= 0.667 m

Discussion

4.	The minimum power of the eye lens is 40 D. If the far point of the normal eye is infinity. Find the size of the eye ball.
Answer» Power of eye lens = P P = 40 D Focal length = f f = \(\frac{1}{P}\) (in meters) f = \(\frac{1}{40}\) = 0.025 m = 2.5 cm Radius of curvature = 2f = 5 cm The eye ball has the radius of 5 cm

4.

The minimum power of the eye lens is 40 D. If the far point of the normal eye is infinity. Find the size of the eye ball.

Answer»

Power of eye lens = P

P = 40 D

Focal length = f

f = \(\frac{1}{P}\) (in meters)

f = \(\frac{1}{40}\)

= 0.025 m

= 2.5 cm

Radius of curvature = 2f

= 5 cm

The eye ball has the radius of 5 cm

Discussion

5.	The value of focal length of the eye lens when an object is at infinity is ……………………… A) 2.50 cm B) 2.25 cm C) 2.27 cm D) can’t find
Answer» Correct option is A) 2.50 cm

Discussion

6.	The value of focal length of the eye lens when the object is between infinity and the point of least distance of distinct vision is …………………… A) greater than 2.5 cm B) less than 2.27 cm C) greater than 25 cm D) between 2.27 cm to 2.50 cm
Answer» D) between 2.27 cm to 2.50 cm

Discussion

7.	The red colour in a rainbow will be seen when the angle between a beam of sunlight and light sent back by a raindrop …………………. A) 42° B) 0° to 40° C) 40° D) 0° to 42°
Answer» Correct option is A) 42°

Discussion

8.	If the far point of eye lens is 10 m, find power of the lens required to correct the defect.
Answer» Far point of the eye lens = v v = -10 m Object distance = u u = ∞ Lens Formula: \(\frac{1}{f}\,=\,\frac1v\,=\,\frac1u\) \(\frac1f\,=\,\frac1{-10}\,-\,\frac1{∞}\) Power of lens, P = 1/f = -10 D Hence the power of the lens required to correct the defect is -10 D. The lens used is a concave lens.

8.

If the far point of eye lens is 10 m, find power of the lens required to correct the defect.

Answer»

Far point of the eye lens = v

v = -10 m

Object distance = u

u = ∞

Lens Formula:

\(\frac{1}{f}\,=\,\frac1v\,=\,\frac1u\)

\(\frac1f\,=\,\frac1{-10}\,-\,\frac1{∞}\)

Power of lens, P = 1/f

= -10 D

Hence the power of the lens required to correct the defect is -10 D. The lens used is a concave lens.

Discussion

9.	The violet colour in a rainbow will be seen when the angle between a beam of sunlight and light sent back by a raindrop ………………. A) 42° B) 40C) 0° to 42° D) 0° to 40°
Answer» Correct option is B) 40°

Discussion

10.	Name the component of white light that deviates the least and the component that deviates the most while passing through a glass prism.
Answer» Least deviated component: Red Most deviated component: Violet

Discussion

11.	The colour of white light which suffers the minimum refraction on passing through a glass prism is …………………A) red B) yellow C) orange D) violet
Answer» Correct option is A) red

Discussion

12.	The colour of white light which suffers the maximum bending on passing through a glass prism is ……………………. A) redB) yellow C) green D) violet
Answer» Correct option is D) violet

Discussion

13.	In the spectrum of white light the two colours appearing at the ends are ………………A) red, violet B) green, yellow C) blue, red D) red, orange
Answer» Correct option is A) red, violet

Discussion

14.	The splitting of white light into different colours is called ………………….. A) dispersion B) scatteringC) refraction D) reflection
Answer» Correct option is A) dispersion Correct option is (A) dispersion

Discussion

15.	The splitting of white light into different colours is called………… A) dispersion B) scattering C) refraction D) total internal reflection
Answer» A) dispersion

Discussion

16.	What will be the focal length of the eye lens when eye muscles are relaxed?
Answer» The focal length of the eye lens is large when eye muscles are relaxed. When the ciliary muscles of the eye are fully relaxed then the eye lens is very thin. Since the eye lens is very thin, its focal length is the maximum in this position.

Discussion

17.	What did Newton demonstrate by his experiments with the prism ?
Answer» Newton demonstrated by his experiments with the prisms that white light consists of a mixture of seven colours.

Discussion

18.	In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum YX on the screen. (a)State the colour seen (i) at X, and (ii) at Y.(b) Why do different colours of white light bend through different angles with respect to the incident beam of light ?
Answer» (a) (i) violet (ii) Red (b) Different colours of white light bend through different angles because different colours travel through different speeds through in the glass prism.

18.

In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum YX on the screen. (a)State the colour seen (i) at X, and (ii) at Y.(b) Why do different colours of white light bend through different angles with respect to the incident beam of light ?

Answer»

(a) (i) violet (ii) Red

(b) Different colours of white light bend through different angles because different colours travel through different speeds through in the glass prism.

Discussion

19.	In prism experiment the i – d curve looks like ……………………… A) straight line B) circle C) parabola D) elipse
Answer» Correct option is C) parabola

Discussion

20.	How many colours are there in a full spectrum of white light ? Write the various colours of spectrum in the order, starting with red.
Answer» There are seven colours in the spectrum of white light. The colours are Red, Orange, Yellow, Green, Blue, Indigo and Violet.

Discussion

21.	Describe how you could demonstrate that white light is composed of a number of colours.
Answer» We will allow a beam of white light to pass through a glass prism. The white light splits to form a band of seven colours. This shows that white light is composed of seven colours.

Discussion

22.	How could you show that the colours of the spectrum combine to give white light ?
Answer» Colours of a spectrum from one prism are allowed to fall on a similar prism placed adjacent to the first prism, but in inverted position. The refraction produced by second prism is equal and opposite to that produced by the first prism. This makes the colours of the spectrum combine to give white light.

Discussion

23.	State whether the following statement is true or false : Rabbit has eyes which look sideways.
Answer» Rabbit has eyes which look sideways. True

23.

State whether the following statement is true or false : Rabbit has eyes which look sideways.

Answer»

Rabbit has eyes which look sideways.

True

Discussion

24.	Name two animals having eyes : (a) on the sides of the head. (b) at the front of the head.
Answer» (a) Rabbit, deer (b) Tiger, lion

24.

Name two animals having eyes : (a) on the sides of the head. (b) at the front of the head.

Answer»

(a) Rabbit, deer

(b) Tiger, lion

Discussion

25.	Out of animals of prey and predators, which have their eyes : 1. at the front of their head ? 2. on the opposite sides of their head ?
Answer» 1. Predators 2. Animals of prey

25.

Out of animals of prey and predators, which have their eyes : 1. at the front of their head ? 2. on the opposite sides of their head ?

Answer»

1. Predators

2. Animals of prey

Discussion

26.	Among animals, the predators (like lions) have their eyes facing forward at the front of their heads, whereas the animals of prey (like rabbit) usually have eyes at the sides of their head. Why is this so ?
Answer» The predators (like lions) have their eyes facing forward at the front of their heads, whereas the animals of prey (like rabbit) usually have eyes at the sides of their head so that they can see their enemies (predators) in a very large area around them and try to escape from them.

Discussion

27.	Five persons A, B, C, D and E have diabetes, leukaemia, asthma, meningitis and hepatitis, respectively. (a) Which of these persons can donate eyes ? (b) Which of these persons cannot donate eyes ?
Answer» (a) A and C (b) B, D and E

27.

Five persons A, B, C, D and E have diabetes, leukaemia, asthma, meningitis and hepatitis, respectively. (a) Which of these persons can donate eyes ? (b) Which of these persons cannot donate eyes ?

Answer»

(a) A and C

(b) B, D and E

Discussion

28.	As light rays pass from air into a glass prism, are they refracted towards or away from the normal ?
Answer» Solution : Towards the normal

Discussion

29.	Which of the following changes takes place when you walk out of bright sunshine into a poorly light room ? A) The pupil becomes larger B) The lens becomes thicker C) The ciliary muscles relax D) The pupil becomes smaller
Answer» D) The pupil becomes smaller

Discussion

30.	The light dispersed by the rain drops appears as a bow because …………………… A) all drops that disperse the light towards us lie in the shape of bowB) all drops that disperse the light towards us lie in the shape of cone with our eye as tipC) all drops that disperse the light towards us lie in the shape of circle. D) none
Answer» B) all drops that disperse the light towards us lie in the shape of cone with our eye as tip

Discussion

31.	In a mirror right of an object appears A) Reverse B) Right C) Top D) Left
Answer» Correct option is D) Left

Discussion

32.	Number of mirrors required to provide multi images A) 3 B) 5 C) 2 D) 6
Answer» Correct option is C) 2

Discussion

33.	Number of images formed by the arrangement of plane mirrors with the angle of 60 A) 6 B) 7 C) 8 D) 5
Answer» Correct option is D) 5

Discussion

34.	Which is the wind that blows in the Alps Hill region?
Answer» For wind below in the Alps mountainous region, which proceeds from the southern slope of the Alps mountain and descends down to the north along with the slope.

Discussion

35.	Where does the Mistral wind blow?
Answer» Mistral wind mainly blows in the north – western part of the Mediterranean Sea, especially in Spain and France.

Discussion

36.	Name some chemicals that are released by acrosome during fertilization.
Answer» The activated spermatozoa undergo acrosomal reaction and release various chemicals, like hyaluronidase that acts on the ground substances of follicle cells, corona penetrating enzyme that dissolves corona radiata and zona lysin or acrosin helps to digest the zona pellucida. All these chemicals are collectively termed sperm lysin. Fertilin proteins are present on the sparm surface.

Discussion

37.	Identify the group of scientists who developed the intergenic hybrid – the pomato.a) Yamada et al. (b) Horsh et al. (c) Takebe et al. (d) Melchers et al.
Answer» (d) Melchers et al.

Discussion

38.	State the role of cryoprotectants in conservation of plant resources.
Answer» Cryoprotectants are the protective agents that are used to protect the cells or tissues from the stress of freezing temperature. E.g: Sucrose.

38.

State the role of cryoprotectants in conservation of plant resources.

Answer»

Cryoprotectants are the protective agents that are used to protect the cells or tissues from the stress of freezing temperature.

E.g: Sucrose.

Discussion

39.	What do you know about Germplasm conservation? Describe it.
Answer» Germplasm conservation refers to the conservation of living genetic resources like pollen, seeds or tissue of plant material maintained for the purpose of selective plant breeding, preservation in live condition and used for many research works. Germplasm conservation resources is a part of collection of seeds and pollen that are stored in seed or pollen banks, so as to maintain their viability and fertility for any later use such as hybridization and crop improvement. Germplasm conservation may also involve a gene bank, DNA bank of elite breeding lines of plant resources for the maintenance of biological diversity and also for food security

39.

What do you know about Germplasm conservation? Describe it.

Answer»

Germplasm conservation refers to the conservation of living genetic resources like pollen, seeds or tissue of plant material maintained for the purpose of selective plant breeding, preservation in live condition and used for many research works.

Germplasm conservation resources is a part of collection of seeds and pollen that are stored in seed or pollen banks, so as to maintain their viability and fertility for any later use such as hybridization and crop improvement. Germplasm conservation may also involve a gene bank, DNA bank of elite breeding lines of plant resources for the maintenance of biological diversity and also for food security

Discussion

40.	Identify the plant tissue used for virus free germplasm(a) Apical meristem(b) Intercalary meristem (c) Lateral meristem (d) Plate meristem
Answer» (a) Apical meristem

Discussion

41.	How virus free plants are developed?
Answer» Shoot meristem tip culture is the method to produce virus-free plants, because the shoot meristem tip is always free from viruses.

Discussion

42.	_____ is regarded as the Father of tissue culture.
Answer» Gottlieb Haberland

Discussion

43.	State whether the following statements are true or false. Correct the false statements:(1) Lactobacilli are aerobic bacteria. (2) Lactobacilli converts lactose sugar into alcohol. (3) Yoghurt has a specific sour taste due to acetic acid. (4) The bacteria Clostridium are present in the root . nodules of leguminous plants. (5) Yeast cell is a prokaryotic cell. (6) The use of Rhizobium has helped to reduce the use of chemical fertilizers. (7) Ethanol is a smokeless and high quality fuel. (8) A yeast, Saccharomyces cerevisiae is used for absorbing toxins released during palm oil production. (9) Gentamycin is a narrow-spectrum antibiotic. (10) Antibiotics mainly act against bacteria.
Answer» (1) False. Lactobacilli are anaerobic bacteria. (2) False. The Lactobacilli converts lactose sugar into lactic acid. (3) False. Yogurt has a specific sour taste due to lactic acid. (4) False. The bacteria Rhizobium are present in the root nodules of leguminous plants. (5) False. Yeast cell is a eukaryotic cell. (6) True. (7) True. (8) False. A yeast, Yarrowia lipolytic is used to absorb the toxins released during the production of palm oil. (9) True. (10) True.

43.

State whether the following statements are true or false. Correct the false statements:(1) Lactobacilli are aerobic bacteria. (2) Lactobacilli converts lactose sugar into alcohol. (3) Yoghurt has a specific sour taste due to acetic acid. (4) The bacteria Clostridium are present in the root . nodules of leguminous plants. (5) Yeast cell is a prokaryotic cell. (6) The use of Rhizobium has helped to reduce the use of chemical fertilizers. (7) Ethanol is a smokeless and high quality fuel. (8) A yeast, Saccharomyces cerevisiae is used for absorbing toxins released during palm oil production. (9) Gentamycin is a narrow-spectrum antibiotic. (10) Antibiotics mainly act against bacteria.

Answer»

(1) False. Lactobacilli are anaerobic bacteria.

(2) False. The Lactobacilli converts lactose sugar into lactic acid.

(3) False. Yogurt has a specific sour taste due to lactic acid.

(4) False. The bacteria Rhizobium are present in the root nodules of leguminous plants.

(5) False. Yeast cell is a eukaryotic cell.

(6) True.

(7) True.

(8) False. A yeast, Yarrowia lipolytic is used to absorb the toxins released during the production of palm oil.

(9) True.

(10) True.

Discussion

44.	The common salt is an important raw material for various materials of daily use, such as sodium hydro4ide, baking soda, washing soda, bleaching powder and many more. When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium hydroxide. The process is called the chlor-alkali process because of the products formed - chlor for chlorine and alkali for sodium hydroxide.1. NaCl is used for _____.(i) Cooking(ii) Painting2. Chlor-alkali is named because of-(i) Products formed are chlorine and sodium peroxide(ii) Products formed are chlorine and sodium hydroxide3. Solution of sodium chloride is called as ______.(i) Brine(ii) Wine4. When electricity is passed through brine what does it forms ?(i) Sodium peroxide(ii) Sodium hydroxide5. Is Baking soda is used for cooking purposes.(i) YES(ii) NO
Answer» 1. (i) Cooking 2. (ii) Products formed are chlorine and sodium hydroxide 3. (i) Brine 4. (ii) Sodium hydroxide 5. (i) YES

44.

The common salt is an important raw material for various materials of daily use, such as sodium hydro4ide, baking soda, washing soda, bleaching powder and many more. When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium hydroxide. The process is called the chlor-alkali process because of the products formed - chlor for chlorine and alkali for sodium hydroxide.1. NaCl is used for _.(i) Cooking(ii) Painting2. Chlor-alkali is named because of-(i) Products formed are chlorine and sodium peroxide(ii) Products formed are chlorine and sodium hydroxide3. Solution of sodium chloride is called as __.(i) Brine(ii) Wine4. When electricity is passed through brine what does it forms ?(i) Sodium peroxide(ii) Sodium hydroxide5. Is Baking soda is used for cooking purposes.(i) YES(ii) NO

Answer»

1. (i) Cooking

2. (ii) Products formed are chlorine and sodium hydroxide

3. (i) Brine

4. (ii) Sodium hydroxide

5. (i) YES

Discussion

45.	A stain of curry on a white cloth becomes reddish brown when soap is scrubbed on it because Curry contains turmeric powder and soap is basic in nature. Bases turn turmeric red. Hence, when soap (which is basic in nature) is scrubbed on the stain, the stain turns red. When the cloth is washed with plenty of water, the soap is removed and the yellow colour of the stain reappears.1. Example of a natural indicator?(i) Turmeric(ii) Chilli powder2. Bases turn turmeric _____.(i) Orange(ii) Red3. Is soap basic in nature?(i) YES(ii) NO4. Why did the stain become reddish brown when soap is scrubbed on it?(i) As it was acidic in nature(ii) As it basic in nature5. What happens when the cloth is washed with plenty of water?(i) It turns red again(ii) It turns yellow again
Answer» 1. (i) Turmeric 2. (ii) Red 3. (i) YES 4. (ii) As it is basic in nature 5. (ii) It turns yellow again

45.

A stain of curry on a white cloth becomes reddish brown when soap is scrubbed on it because Curry contains turmeric powder and soap is basic in nature. Bases turn turmeric red. Hence, when soap (which is basic in nature) is scrubbed on the stain, the stain turns red. When the cloth is washed with plenty of water, the soap is removed and the yellow colour of the stain reappears.1. Example of a natural indicator?(i) Turmeric(ii) Chilli powder2. Bases turn turmeric _____.(i) Orange(ii) Red3. Is soap basic in nature?(i) YES(ii) NO4. Why did the stain become reddish brown when soap is scrubbed on it?(i) As it was acidic in nature(ii) As it basic in nature5. What happens when the cloth is washed with plenty of water?(i) It turns red again(ii) It turns yellow again

Answer»

1. (i) Turmeric

2. (ii) Red

3. (i) YES

4. (ii) As it is basic in nature

5. (ii) It turns yellow again

Discussion

46.	How is alcohol produced?
Answer» Alcohol is often produced along with sugar in sugar factories. Molasses is produced from sugarcane juice. It is rich in carbohydrates. Molasses is fermented with the help of the yeast Saccharomyces. In this process, ethanol (C₂H₅OH) alcohol is produced as a primary product and ester and other alcohols are produced as secondary products. Besides molasses, maize, barley and other grains are also used for industrial production of alcohol. Glucose and fructose, the sugars present in grape juice are also fermented with the help of yeast to produce alcohol which is used to make wines.

Discussion

47.	What is symbiosis? Give example.
Answer» Symbiosis is a mutually beneficial relationship. Example: Rhizobium living in root nodules of leguminous plants supply nitrates, nitrites and amino acids to that plant and in exchange get energy in the form of carbohydrates.

Discussion

48.	Why is it necessary to safely store the pathogens of a disease against which vaccines are to be produced?
Answer» Pathogens are microbes which can cause diseases in us. For the preparation of a vaccine, a particular pathogen is cultured and grown in a laboratory. If these pathogens are not safely stored, they many get modified due to environmental factors, resulting in decrease in the efficiency of the vaccine. Also, the live pathogens may escape and cause diseases in us.

Discussion

49.	How is a vaccine produced?
Answer» Vaccines are made using the disease causing bacteria or virus but in a form that will not harm the human beings. Vaccine is made from dead or weakened microbes or their toxins. Vaccine stimulates the immune system to produce antibodies which give life-long protection against the disease. There are specific vaccines for specific diseases.

Discussion

50.	Which vaccines are given to infants? Why?
Answer» Hepatitis A and B, DTP (Diphtheria, Tetanus, Pertussis.) Polio, MMR (Measles, Mumps, Rubella), Chicken pox, Influenza, Tetanus, BCG, Rotavirus, etc. Vaccines consist of dead or weakend microbes. When these are swallowed or injected, the body produces antibodies to fight them. These antibodies remain in the body and protect it from any future attack of the disease causing microbes. Therefore, vaccines are given to infants for preventing diseases.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The range of focal length of an eye lens is………………….. A) 0 to ∝ B) 2.25 to 2.50 cm C) 2.27 to 2.50 cm D) 0 to 25

Mention the position where the image is focused in the eye of a person having Hypermetropia.

The power of a lens is + 1.5 D. Name the type of defects vision that can be corrected by using this lens. Find the focal length of the lens.

The minimum power of the eye lens is 40 D. If the far point of the normal eye is infinity. Find the size of the eye ball.

The value of focal length of the eye lens when an object is at infinity is ……………………… A) 2.50 cm B) 2.25 cm C) 2.27 cm D) can’t find

The value of focal length of the eye lens when the object is between infinity and the point of least distance of distinct vision is …………………… A) greater than 2.5 cm B) less than 2.27 cm C) greater than 25 cm D) between 2.27 cm to 2.50 cm

The red colour in a rainbow will be seen when the angle between a beam of sunlight and light sent back by a raindrop …………………. A) 42° B) 0° to 40° C) 40° D) 0° to 42°

If the far point of eye lens is 10 m, find power of the lens required to correct the defect.

The violet colour in a rainbow will be seen when the angle between a beam of sunlight and light sent back by a raindrop ………………. A) 42° B) 40C) 0° to 42° D) 0° to 40°

Name the component of white light that deviates the least and the component that deviates the most while passing through a glass prism.

The colour of white light which suffers the minimum refraction on passing through a glass prism is …………………A) red B) yellow C) orange D) violet

The colour of white light which suffers the maximum bending on passing through a glass prism is ……………………. A) redB) yellow C) green D) violet

In the spectrum of white light the two colours appearing at the ends are ………………A) red, violet B) green, yellow C) blue, red D) red, orange

The splitting of white light into different colours is called ………………….. A) dispersion B) scatteringC) refraction D) reflection

The splitting of white light into different colours is called………… A) dispersion B) scattering C) refraction D) total internal reflection

What will be the focal length of the eye lens when eye muscles are relaxed?

What did Newton demonstrate by his experiments with the prism ?

In prism experiment the i – d curve looks like ……………………… A) straight line B) circle C) parabola D) elipse

How many colours are there in a full spectrum of white light ? Write the various colours of spectrum in the order, starting with red.

Describe how you could demonstrate that white light is composed of a number of colours.

How could you show that the colours of the spectrum combine to give white light ?

State whether the following statement is true or false : Rabbit has eyes which look sideways.

Name two animals having eyes : (a) on the sides of the head. (b) at the front of the head.

Out of animals of prey and predators, which have their eyes : 1. at the front of their head ? 2. on the opposite sides of their head ?

Among animals, the predators (like lions) have their eyes facing forward at the front of their heads, whereas the animals of prey (like rabbit) usually have eyes at the sides of their head. Why is this so ?

Five persons A, B, C, D and E have diabetes, leukaemia, asthma, meningitis and hepatitis, respectively. (a) Which of these persons can donate eyes ? (b) Which of these persons cannot donate eyes ?

As light rays pass from air into a glass prism, are they refracted towards or away from the normal ?

Which of the following changes takes place when you walk out of bright sunshine into a poorly light room ? A) The pupil becomes larger B) The lens becomes thicker C) The ciliary muscles relax D) The pupil becomes smaller

In a mirror right of an object appears A) Reverse B) Right C) Top D) Left

Number of mirrors required to provide multi images A) 3 B) 5 C) 2 D) 6

Number of images formed by the arrangement of plane mirrors with the angle of 60 A) 6 B) 7 C) 8 D) 5

Which is the wind that blows in the Alps Hill region?

Where does the Mistral wind blow?

Name some chemicals that are released by acrosome during fertilization.

Identify the group of scientists who developed the intergenic hybrid – the pomato.a) Yamada et al. (b) Horsh et al. (c) Takebe et al. (d) Melchers et al.

State the role of cryoprotectants in conservation of plant resources.

What do you know about Germplasm conservation? Describe it.

Identify the plant tissue used for virus free germplasm(a) Apical meristem(b) Intercalary meristem (c) Lateral meristem (d) Plate meristem

How virus free plants are developed?

_____ is regarded as the Father of tissue culture.

How is alcohol produced?

What is symbiosis? Give example.

Why is it necessary to safely store the pathogens of a disease against which vaccines are to be produced?

How is a vaccine produced?

Which vaccines are given to infants? Why?