Question # 1

G₁ is time between the end of mitosis and initiation of DNA synthesis also called as

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Pre-DNA synthesis phase

DNA synthesis phase

Post-DNA synthesis phase

None of these

The receptor cells of Planaria are sensitive to.

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Light and pressure

Light pressure and touch

Touch , pressure and chemicals

Light, pressure, touch and chemicals

All the 64 codons were tested by

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Marshall Nirenberg

Philip Leader

Har Gobind Khorana

All a,b,and,c

First essential phenomenon of meiosis i.e pairing of homologous Chromosomes called synapsis starts in

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Leptotene

Zygotene

Pachytene

Diplotene

Chromosomal theory of inheritance was first formulated by.

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Karl Correns

T.H.Morgan

W. Sutton

Carvin Bridges

³²P and ³⁵S labeled viruses were used in his experiments by

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Watson & Crick

Hershey & Chase

Wilkins & Franklin

Correns & Bridge

German botanist Gottlieb Haberlandi said in 1902 that plant cells are

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Totipotent

Potent

Totipersausive

Totistrong

Expression of a trait is termed as

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Genotype

Phenotype

Dominance

Wild type

Parathyroid hormone acts to ensure that

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Calcium levels in the blood never drop too low

Sodium levels in urine are constant

Potassium levels in the blood do not escalate

The concentration of water in the blood is sufficient

The animals that lay shelled eggs to protect the developing embryo are called.

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Oviparous

Ovovlviparous

Viviparous

Egg laying mammals

Coniferous forest located at high attitude are called.

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Boreal

Alpine

Talga

Prailes

Excretory structure present in cockroach are.

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Contractile vacuole

Malpighian tubules

Nephridia

Flame cells

This condition appears as a result of point mutation.

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Down syndrome

Turner syndrome

Sickel cell Anaemia

Klinefelter syndrome

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

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Thymine

Guanine

Cytosine

Uracil

Human appendix, coccyx and nictiating membrane of the eye are:

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Vestigical organs

Homologous organs

Analogous organs

Embroyonic organs

Walter Fleming first discovered chromosomes in the dividing cells of.

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Frog larvae

Sea urchin larvae

Insect larvae

Salamander larvae

Haploid males produce sperms by mitosis.

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Hydra

Man

Earth worm

Honey bee

Rain that falls on high areas such as mountains possesses large amount of garvitational

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Heat energy

Kinetic energy

Electrical energy

Potential energy

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