Question # 1

In sickle cell anemia disease, a single thymine is replaced with an adenine in the DNA that codes for.

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Valine

Glycine

Histidine

Glutamic acid

The no of chromosome in mouse is

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6

32

26

40

Morphological characteristics of chromosome are collectively called.

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Holotype

Karyokinesis

Karyotype

Neotype

A chromosome with equal length of its arms.

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Acrocentric

Metacentric

sub meta centric

Telocentric

Innate behavior is all except;

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Coded in DNA

Modified in individuals life span

Modified with species evolution

Programmed responses to external stimuli

Repeating units of DNA are called.

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Histones

Nucleosides

Nucleotides

Amino acids

Chromosomal part which uncoils, during inter phase is called.

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Chromatids

Satellite DNA

Euchromatin

Heterochromatin

The base pairs in human genome are.

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Two billion

Three billion

Four billion

Five billion

Chromosomes appear inside the nucleus at the time of.

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Cell division

Cell maturation

Cell elongation

Cell differentiation

A central role for chromosomes in heredity was first suggested in 1900 by.

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Karl correns

W. Sutton

F. Griffiths

T.H.Morgan

Human cells have 46 chromosomes consisting of

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20 pairs

21 pairs

22 pairs

23 pairs

Each tRNA has a sequence of three bases called anticodon which is complementary to codon of

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rRNA

tRNA

mRNA

snRNA

Origin site of replication is one in

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Prokaryotes

Eukaryotes

None of these

Both a & b

No of chromosomes in Honey bee are.

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6

20

32

40

Adenine and guanine are called

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Purines

Pyrmidines

Both a & b

None of these

In 1944 Oswald Avery along with Colin Macleod and Maclyn McCarty repeated experiments of

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Lamarck

Griffith

Darwin

Spemann

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

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Thymine

Guanine

Cytosine

Uracil

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