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21751.

Question : (a) Identify the tissues 1,2and 3. (b) .................... (1) muscles are associated with locomotion and are innervated by ......... ... (2) nervous system. Whereas ................... (3) muscles are innervated by autonomic nervous system and associated ............. (4) muscles are associated with ................. (5) nervous system associated with pumping of blood .................... (6) and ................... (7) are uninucleated where as ........ (8) is multinucleated.The muscle ................. (9) and ................. (10) are involuntary where as .................. (11) muscle is voluntary.

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Solution :(a) (1) CARDIAC MUSCLE FIBRES(2) Smoth muscle fibre (3) Striated muscle fibre.
(b) (1) Striated, (2) Peripheral, (3) Smooth , (4) Cardiac,(4) Cardiac , (5) Autonomic , (6) Cardiac , (7) Smooth , (8) Striagted muscle fibre , (9) Smooth , (10) Cardiac ,(11) Skeletal.
Discussion
21752.

Question : A Danish Physician, Christian Gram developed a staining procedure to differentiate bacteria. List the various steps involved in that procedure.

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SOLUTION :(a) (i) Gram staining Techniques :
1. Prepare a smear of bacterial culture
2. Stain with crystal violet for 30 seconds
3. RINSE in distilled water for 2 seconds
4. Grams lodine for 1 minute
5. Rinse in distilled water
6. Wash in `95%` ethanol or acetone for 10 to 30 seconds
7. Rinse in distilled water
8. SAFRANIN for 30-60seconds
9. Rinse in distilled water and blot
10. Observe under MICROSCOPE
(ii)
Discussion
21753.

Question : Draw and label the internal structure of Nerium leaf.

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Solution :(a) (i) Internal STRUCTURE of NERIUM leaf :

(ii) Vascular Bundle :
(A) CONCENTRIC Amphivasal vascular bundle
(B) Radial arrangement
Discussion
21754.

Question : A : Hypothalamus is made up of neuron. R : Pineal hormone secreted from hypothalamus.

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A and R both are CORRECT and R is correct EXPLANATION of A.
A and R are correct but R is not explanation of A.
A is correct and R is FALSE.
A and R are false.

Answer :B
Discussion
21755.

Question : A : Hypothalamus and adenohyapophysis in connected through hypthalahyphoseal axis R : Hypothalamus secretes the releasing hormones the inhibiting hormones.

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A and R both are CORRECT and R is correct EXPLANATION of A.
A and R are correct but R is not explanation of A.
A is correct and R is FALSE.
A and R are false.

Answer :B
Discussion
21756.

Question : State whether the following statement is true or false. A hypertonic solution has a water concentration greaterthan that is found inside the cell. A. TrueB. False

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ANSWER :FALSE
Discussion
21757.

Question : A hydrophyte with spongy swollen petioles, spongy stem and balancing roots with root pockets is

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PISTIA
EICHHORNIA
TRAPA
Hydrilla

Answer :D
Discussion
21758.

Question :A hydrophyte with spongy swollen petioles, balancing roots with root pockets is

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PISTIA
Eichhornia
Trapa
HYDRILLA

ANSWER :B
Discussion
21759.

Question : A hydra moves via :

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NEMATOCYSTS
CONTRACTION of the NERVE net
epitheliomuscular FIBRES in the epidermis
epitheliomuscular fibres in the mesoglea

Solution :epitheliomuscular fibres in the epidermis
Discussion
21760.

Question : A hundred year old tree of temperate area will show

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100 rings from base to top
IRREGULAR number of rings which SHOW INCREASE or DECREASE along the length
More than 100 rings at the base and less than 100 near the top
100 rings at the base and progressive decrease towards the top

Answer :D
Discussion
21761.

Question : A human liver cell measures 20 mum in diameter. This isequivalent to :

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200 NM
0.02 nm
0.02 `MUM`
2000 nm

SOLUTION :0.02 `mum`
Discussion
21762.

Question : (a) How would you differentate primary lysosomes, secondary lysosomes, residual bodies and autophagic (b) From where do lysosomes arise ? (c) Name three kinds of lysosomes present in plants. What do they contain besides digestive enzymes ?

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Solution :(a) A newly formed lysosome containing hydrolytic enzymes is called primary lysosome. Secondary lysosome contains hydrolytic enzymes and some DIGESTIBLE material. A secondary lysosome, after digestion of matter. Contains indigestible matter. Such a lysosome is called residual body.
At times, primary lysosome fuses with damaged or unwanted organelles, forming a large sac called AUTOPHAGIC vacuole.
(b) Lysosome arise from the Golgi complex.
(c) Three kinds of plant lysosomes are spherosomes, aleurone GRAIN and vacuoles. These ALSO contain reverse FOOD materials.
Discussion
21763.

Question : A hormonee delaying senescence is

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auxin
cytokinin
ethylene
gibberellin

Answer :B
Discussion
21764.

Question : A hormone responsible for normal sleep wake cycle is

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epinephrine
gastrin
melatonin.
insulin.

Solution :Melatonin is a hormone secreted by pineal gland. Immediately above the optic CHIASMA (in the brain) in a nuceus, are present melatonin receptors that react to this hormone and synchronise the nuclues to the 24 HRS day/night RHYTHM thus informing the brain when it is day and when it is RIGHT
Discussion
21765.

Question : A hormone responsible for normal sleep - wake cycle is ………..

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EPINEPHRINE
Gastrin
MELATONIN
Insulin

Solution :Melatonin hormone SECRETED from pineal GLAND. It shows functions like maintaining body temperature.
Discussion
21766.

Question : A : Hormone calcitonin has antagonistic effect to that of parathormone. R : Calcitonin decreases blood Ca^("++") level while PTH increases blood Ca^("++") level.

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A and R both are CORRECT and R is correct EXPLANATION of A.
A and R are correct but R is not explanation of A.
A is correct and R is FALSE.
A and R are false.

Answer :A
Discussion
21767.

Question : A hormone delaying senescence is (a) auxins(b) cytokinin(c) ethylene(d) gibberellin

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auxins
cytokinin
ethylene
gibberellin
Discussion
21768.

Question : A homopolymer has only one type of building block called monomer repeated 'n' number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers usually made of

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20 types of monomer
40 types of monomer
30 types of monomer
only one type of monomer.

Solution :The FUNCTION and shape of a protein is affected by sequence of 20 types of amino acids, each having an amino group `-NH_(2)`, a CARBOXYLIC acid group `-COOH`, a hydrogen ATOM each attached to carbon located NEXT to `-COOH` group and a side chain R which varies from one amino acid to other. (it can be hydrogen or an aliphatic group, an aromatic or HETEROCYCLIC group).
`H_(2)N-underset(R)underset(|)overset(H)overset(|)(C)-COOH`
Discussion
21769.

Question :A homopolymer has only one type of building block called monomer repeated 'n' number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers usually made of

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20 TYPES of monomers
40 types of monomers
30 types of monomers
only ONE type of MONOMER

ANSWER :A
Discussion
21770.

Question : A histologist would describe the layered, flat, scalyepitheliumof human skin as :

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SIMPLE SQUAMOUS
STRATIFIED squamous
stratified columnar
pseudostratified cuboidal

Solution :stratified squamous
Discussion
21771.

Question : A higher CO_(2) concentration of blood causes

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Slow DIFFUSION of `CO_(2)` from BLOOD
Slow transport of `CO_(2)` from blood
Slow transport of `O_(2)` from blood
Both A and B

Solution :Slow diffusion of `O_(2)` from blood
Discussion
21772.

Question : A: Hierarchial system of classification is useful in that it reduces the volume of description in a catalogue of animals and plants. R : Characters given for a larger category (say a phylum) need not be repeated for smaller categories (say classes, orders etc.) (A) A and R both are correct and R is correct explanation of A. (B) A and R are correct but R is not explanation of A. (C) A is correct and R is false. (D) A and R are false

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A and R both are CORRECT and R is correct EXPLANATION of A. 
A and R are correct but R is not explanation of A. 
A is correct and R is FALSE. 
A and R are false 

ANSWER :A
Discussion
21773.

Question : A heterosporous plant is one that :

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PRODUCES a gametophyte that bears both sex organs
produces microspores and megaspores giving rise toseparate MALE and FEMALE GAMETOPHYTES
is a seedless vascular plant
produces two kinds of spores, one asexually by mitosis and one by meiosis

Solution :produces microspores and megaspores giving rise toseparate male and female gametophytes
Discussion
21774.

Question : A healthy individual has 12-16 gms of hemoglobin in every 100 ml of blood.

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ANSWER :TRUE
Discussion
21775.

Question : A healthy adult human excretes (on an average)_____________gm of urea/day

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SOLUTION :25-30 g/day
Discussion
21776.

Question : A healthy adult human excretes (on an average) ___gm of urea/day.

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ANSWER :20-30 GM
Discussion
21777.

Question : A Haversian canal with its surrounding lamellae and osteocytes contitutes a cylindricalunit of bone called

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PERIOSTEUM
ENDOSTEUM
OSTEON
haversian

Answer :C
Discussion
21778.

Question : A: Gymnosperms do not produce fruits. R : The ovules of gymnosperms are not enclosed within the ovaries.

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A and R both are CORRECT and R is correct EXPLANATION of A. 
A and R are correct but R is not explanation of A. 
A is correct and R is FALSE. 
A and R are false. 

ANSWER :A
Discussion
21779.

Question : A gymnosperm with unbranched stem is

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Pinus
Sequoia
Cycas
Cedrus

ANSWER :C
Discussion
21780.

Question : A gymnosperm having xylem vessels is

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SELAGINELLA
EQUISETUM
Gnetum
Drimys

Answer :C
Discussion
21781.

Question : A gymnosperm with mycorrhiza is

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Cycas
Casuarina
Pinus
Cedrus

Answer :C
Discussion
21782.

Question : A gymnosperm grown for its appearance is

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Pinus
Picea
Araucaria
Cedrus

ANSWER :C
Discussion
21783.

Question :a. Growing fish or other aquatic animals and plants together in an integrated system. The fish wastes provides nutrients for the plants and the plants filter the water. Additionally bacteria break down by-products such as ammonia. b. Growing plants in a nutrient solution instead of soil. Fish kept in the water provide the required nutrients. Write the appropriate scientific terms for above (a) and (b) and differentiate between them.

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SOLUTION :a. AQUAPONICS
B. HYDROPONICS
Discussion
21784.

Question : A group of related genera represent

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SPECIES
Taxa
Order
FAMILY

ANSWER :D
Discussion
21785.

Question : A group of organisms having similar traits of a rank is ………………. .

Answer»

SPECIES
GENUS
ORDER
TAXON

ANSWER :D
Discussion
21786.

Question : A group of neurons in PNS, CNS respectively are

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NUCLEI, ganglion
ganglion, nucleus
CONNECTIVES, commissures
commissures, connectives 

ANSWER :B
Discussion
21787.

Question : A group of organisms having similar traits of a rank is

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SPECIES
TAXON
GENUS
FAMILY

ANSWER :A
Discussion
21788.

Question : A group of mammals having long canines.

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SOLUTION :Camivora
Discussion
21789.

Question : A group of interconnected food chains is called

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PYRAMID of energy
FOOD web
Food cycle
Complex food chain

Answer :B
Discussion
21790.

Question : A group of animals which are related by descent and share many similarties are referred to as:

Answer»

Breed
Race
Variety
Species

Answer :A
Discussion
21791.

Question :A green, flattened stem branch of limited growth with onlyone or two internodes is :

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PHYLLOCLADE
CLADODE
PHYLLODE
RUNNER

SOLUTION :cladode
Discussion
21792.

Question : A grain of maize is the :

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EMBRYO
SEED
FRUIT
fruit and seed

SOLUTION :fruit and seed
Discussion
21793.

Question : A : Glucagon is a hypoglycemic hormone. R : It increases the utilization of glucose in tissue.

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A and R both are CORRECT and R is correct EXPLANATION of A.
A and R are correct but R is not explanation of A.
A is correct and R is FALSE.
A and R are false.

Answer :D
Discussion
21794.

Question : A gland not associated with the alimentary canal is

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Pancreas
Adrenal
Liver
Salivary gland

Answer :B
Discussion
21795.

Question : (a) Give the answers of the questions given below the following diagram : (i) Identify 3, 4, 5 and 6 in the above figure. (ii) What is function of 3? (iii) If diameter of part "2" is made double to the part "1", then what will be the effect? (b) If the prostate gland is enlarged in old age, then what will be the effect on urination?

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Solution :(a) (i) The PARTS of NEPHRON labelled as 3, 4, 5 and 6 are Bowmann.s capsule, ascending loop of Henle, collecting tubule and proximal convoluted tubule.
(ii) Bowmann.s capsule is the site of ultrafiltration or glomerular filtra
(iii) If the DIAMETER of efferent arteriole (2) is MADE double to afferent arteriole (1), ultrafiltration will not occur.
(b) If the prostate GLAND is enlarged in old age, it frequently blocks the urethra and makes urination painful or difficult.
Discussion
21796.

Question : Identify the wrong match(a) Glomerulonephritis - Bright's disease (b) Toxic Urea - Haemodialysis (c) Glucose - Glucosuria (d) Ketone bodies - Hydrocarbons

Answer»


ANSWER :(d)
Discussion
21797.

Question : A girdled plant (upto bast) may survive for some time but it will eventually die, because

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water will not MOVE DOWNWARDS
water will not move upwards
SUGARS and other organic MATERIALS will not move downwards
sugars and other organic materials will not move upwards.

Solution :N//A
Discussion
21798.

Question : A gardener finds some broad-leaved dicot weeds growing in his lawns. What can be done to get rid of the weeds efficiently ?

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Solution :The broad leaved dicot WEEDS can be killed and eliminated by the spray of WEEDICIDE 2-4 D, (a kind of PLANT phytohormone auxin). This will make the lawn free of weeds and will help the GARDENER to make the lawn weed free.
Discussion
21799.

Question : A gardener forgot to water a potted plant for a day during summer, what will happen to the plant ? Do you think it is reversible ? If yes, how ?

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Solution :If the gardener forgets to water the plant then leaves will DRY up and fall down. If water is SUPPLIED at PROPER timing then plant will regain its position and will become normal.
But if WATERING is delayed then plant does not become normal and felling of leaves causes death of the plant.
Discussion
21800.

Question : A+G = C+T, then it is

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SS RNA
DS RNA
ss DNA
ds DNA

Answer :D
Discussion