Question # 1

In the double helix of DNA adenine forms two hydrogen bonds with

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Thymine

Guanine

Cytosine

Uracil

The collenchymatous cells are highly lignified and found in the.

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Hydrotropism

Thigmotropism

Geotropism

Phototropism

Why is there no glucose present in the filterate in the distal tubule of a nephron?

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Its molecules are two large to pass across the base ment membrane

It is removed by osmosis from the tubule

It is positively absorp by the cells lining the descending loop of henie

He is actively absorb by hte proximal tubule cells

Which one is not desert.

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Thar

Thal

Sahara

Talga

The interphase of meiosis lacks the stage.

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G0

G1

G2

S

The most threatened areas on the earth have been reduced to 44% of their original extent are

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Tropical rain forests

Temperate rain forests

Carbiniferous forests

Deciduous rain forests

Okazaki fragments are about 1000 - 2000 nucleotides long in

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Prokaryotes

Eukaryotes

Both a & b

None of these

There are__ muscles in the human body., most of which occur in pairs.

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650

630

660

645

Which one of the following pairs represents analogous features?

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Elephant tusks & Human incisors

Insects wings & bat wings

Mammal fore limb & bird wing

Reptilian heart & mammalism heart

In 1953 Watson and Crick proposed structure of the

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RNA molecule

ATP molecule

DNA molecule

NAD molecule

PSC 101 has antibiotic resistance gene for.

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Tetracycline

Neomycin

Ampicillin

Ergotine

Study of single population's relationship to its environment is called.

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Niche

Autecology

synecology

Predation

The Limbic system is located between thalamus and

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Hypothalamus

Cerebrum

Pons

Cerebellum

The end products of haemoglobin breakdown and metabolites of various hormones is

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Glucagon

Bilirubin

Keratin

Serotonin

Photoperiodism was first studied by garner and allured in.

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1918

1920

1922

1924

The organic portion of bones matrix is important in providing all but:

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Tensile strength

Hardness

To resist stretch

Flexibilty

Rickets is due to deficiency of vitamin.

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A

C

D

E

the reabsorption of water in collecting tubules is under the control of.

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Aidostenrone

ADH

Pressure filtration

Tubular secretion

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