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201.

Assuming human genome as 3 × 109bp, in how many base sequences would there be differences?

Answer» Assuming human genome as 3 × 109bp, in how many base sequences would there be differences?
202.

DPT vaccine is __________.

Answer»

DPT vaccine is __________.


203.

The confirmation of starch can be done by using:

Answer»

The confirmation of starch can be done by using:


204.

Which of the following is incorrect about variations?

Answer» Which of the following is incorrect about variations?
205.

What precautions should farmers take before spraying weedicides

Answer» What precautions should farmers take before spraying weedicides
206.

Which is the most effective and harmful microbe?

Answer»

Which is the most effective and harmful microbe?

207.

Which of the following can be used to reduce air pollution?

Answer»

Which of the following can be used to reduce air pollution?



208.

What precaustions should be taken before consuming antibiotics

Answer» What precaustions should be taken before consuming antibiotics
209.

The process in which the male sex cell and the female sex cell fuse together is called ___.

Answer»

The process in which the male sex cell and the female sex cell fuse together is called ___.


210.

The cytoplasm of the cells of a tomato plant contains organelles X having different pigments which impart different colours to the leaves of the tomato plant and its fruits. (a) What is the general name of the organelles X? (b) What is the (i) name (ii) colour, and (iii) function, of organelles X present in the leaves of the tomato plant? (c) What is the colour of organelles X which are present in the ripe fruits of the tomato plant?

Answer»

The cytoplasm of the cells of a tomato plant contains organelles X having different pigments which impart different colours to the leaves of the tomato plant and its fruits.
(a) What is the general name of the organelles X?
(b) What is the (i) name (ii) colour, and (iii) function, of organelles X present in the leaves of the tomato plant?
(c) What is the colour of organelles X which are present in the ripe fruits of the tomato plant?

211.

What is Amoxicillin

Answer» What is Amoxicillin
212.

___ refers to the variety of organisms existing on the Earth, their interrelationships and their relationship with the environment.

Answer» ___ refers to the variety of organisms existing on the Earth, their interrelationships and their relationship with the environment.
213.

INK WILL BE SEPARATED BY BOTH CHEMICAL AND PHYSICAL METHOD

Answer» INK WILL BE SEPARATED BY BOTH CHEMICAL AND PHYSICAL METHOD
214.

Question 10 Which one of the following is not associated with reproduction? (a) A new leaf coming out of a tree branch. (b) A dog giving birth to puppy. (c) A seed growing into a plant. (d) Chick hatching from an egg.

Answer»

Question 10

Which one of the following is not associated with reproduction?
(a) A new leaf coming out of a tree branch.
(b) A dog giving birth to puppy.
(c) A seed growing into a plant.
(d) Chick hatching from an egg.

215.

Which is an important site for protein synthesis? A) ribosomes B) nucleolus(nucleus)

Answer» Which is an important site for protein synthesis?
A) ribosomes
B) nucleolus(nucleus)
216.

The diet that contains all the nutrients needed by our body, in the right proportions, is called as __.

Answer»

The diet that contains all the nutrients needed by our body, in the right proportions, is called as __.

217.

Which of the following is/are true about forests?

Answer»

Which of the following is/are true about forests?


218.

(a) What are producers, primary consumers, secondary consumers and tertiary consumers? Give one example of each.​(b) Write a food chain having four trophic levels. Mark the producer and various types of consumers in it.

Answer» (a) What are producers, primary consumers, secondary consumers and tertiary consumers? Give one example of each.

​(b) Write a food chain having four trophic levels. Mark the producer and various types of consumers in it.
219.

What is the role of HCl in our digestion?

Answer»

What is the role of HCl in our digestion?


220.

Question 2Majority of cells cannot be seen directly with our naked eyes because:(a) organisms are generally unicellular(b) cells are microscopic(c) cells are present only inside the body(d) cells are grouped into tissues

Answer» Question 2

Majority of cells cannot be seen directly with our naked eyes because:



(a) organisms are generally unicellular

(b) cells are microscopic

(c) cells are present only inside the body

(d) cells are grouped into tissues
221.

Why do crops grown in sandy soil require irrigation more frequently?

Answer»

Why do crops grown in sandy soil require irrigation more frequently?


222.

Silk worms mostly feed on which of the following leaves?

Answer»

Silk worms mostly feed on which of the following leaves?


223.

Explain how sexual reproduction causes variation?

Answer»

Explain how sexual reproduction causes variation?
224.

Many people living in the _____ areas consume fish as a major part of their diet.

Answer»

Many people living in the _____ areas consume fish as a major part of their diet.


225.

74. Difference between feedback repression and feedback regulation wrt trp operon

Answer» 74. Difference between feedback repression and feedback regulation wrt trp operon
226.

Duration of the menstrual cycle in the human female is _____ days.

Answer»

Duration of the menstrual cycle in the human female is _____ days.


227.

Embryo derives its nutrition from

Answer»

Embryo derives its nutrition from


228.

A farmer was unhappy because of his low crop yield. He discussed the problem with an agricultural scientist and realised that the soil of his field was either too acidic or too basic. What remedy would you suggest the farmer to neutralise the soil?

Answer» A farmer was unhappy because of his low crop yield. He discussed the problem with an agricultural scientist and realised that the soil of his field was either too acidic or too basic. What remedy would you suggest the farmer to neutralise the soil?
229.

What is green chemistry.?Define method generally use in green chemistry?

Answer» What is green chemistry.?
Define method generally use in green chemistry?
230.

Answer the following question based on the image given below. _________ bacteria lives in the root nodules and the relationship it shares with the roots of the leguminous plants is called as ________.

Answer»

Answer the following question based on the image given below.
_________ bacteria lives in the root nodules and the relationship it shares with the roots of the leguminous plants is called as ________.

231.

Among rust, smut and mushroom, all the three

Answer»

Among rust, smut and mushroom, all the three


232.

What are the physical changes which occur in the age of adolescence?

Answer» What are the physical changes which occur in the age of adolescence?
233.

________ are called as food factories of plants.

Answer»

________ are called as food factories of plants.


234.

Cellular totipotency was first demonstrated by

Answer»

Cellular totipotency was first demonstrated by


235.

Name any two Bird Sanctuaries in India. Where are these located ?

Answer»

Name any two Bird Sanctuaries in India. Where are these located ?

236.

Liver cells and cellulosic cell wall bound cells contain extra copies of genetic elements in: 1. Ribosome 2. Rough endoplasmic reticulum 3. Smooth endoplasmic reticulum 4. Chloroplast 5. Centriole 6. Mitochondria

Answer»
Liver cells and cellulosic cell wall bound cells contain extra copies of genetic elements in:
1. Ribosome
2. Rough endoplasmic reticulum
3. Smooth endoplasmic reticulum
4. Chloroplast
5. Centriole
6. Mitochondria
237.

What is the causative agent of Influenza?

Answer»

What is the causative agent of Influenza?


238.

79. Mechanism of gold-leaf eletroscope?

Answer» 79. Mechanism of gold-leaf eletroscope?
239.

Which of the following statements come under animal husbandry?

Answer»

Which of the following statements come under animal husbandry?



240.

Name two traditional methods of irrigation and two modern methods of irrigation.

Answer»

Name two traditional methods of irrigation and two modern methods of irrigation.

241.

HIV is not spread through ___ .

Answer»

HIV is not spread through ___ .


242.

Which of the following is a part of the male reproductive system in flowers?

Answer»

Which of the following is a part of the male reproductive system in flowers?


243.

In which of the following weeds are placed?

Answer» In which of the following weeds are placed?
244.

(a) What are gametes?(b) In which sort of reproduction are gametes involved?(c) What is formed when two gametes fuse?(d) What is this act of fusion called?

Answer»

(a) What are gametes?

(b) In which sort of reproduction are gametes involved?

(c) What is formed when two gametes fuse?

(d) What is this act of fusion called?

245.

What do you mean by microbial what is the study of microorganisms

Answer» What do you mean by microbial
what is the study of microorganisms
246.

Which of the following is not the property of plastids?

Answer»

Which of the following is not the property of plastids?

247.

Name a hormone (other than adrenalin) secreted by adrenals.

Answer»

Name a hormone (other than adrenalin) secreted by adrenals.

248.

What is the difference between viviparous animals and oviparous animals ?

Answer»

What is the difference between viviparous animals and oviparous animals ?

249.

What is the main advantage of drip irrigation?

Answer» What is the main advantage of drip irrigation?
250.

What are the characteristics of fovea, sclera, choroid ?

Answer» What are the characteristics of fovea, sclera, choroid ?