DNA and Evolution [Subject SAT (College Board) Biology]: Questions 41 - 46 of 134

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Question number: 41

DNA and Evolution
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Question

MCQ▾

In DNA double helix, both the DNA strands are

Choices

Choice (5)Response

a.

Coiled around a common axis

b.

Covered by protein sheath

c.

Coiled in a different way

d.

Coiled around each other

e.

None of the above

Question number: 42

DNA and Evolution
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Question

MCQ▾

Yellow spider is the best example of which of the following?

Choices

Choice (5)Response

a.

Mimicry

b.

Natural selection

c.

Reproductive isolation

d.

Mutation

e.

All of the above

Question number: 43

DNA and Evolution
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Question

MCQ▾

Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to

Choices

Choice (5)Response

a.

Crossing over

b.

Linkage

c.

Recombination

d.

Repulsion

e.

None of the above

Question number: 44

DNA and Evolution
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Question

MCQ▾

Species occurring in different geographical area are called as

Choices

Choice (5)Response

a.

Sympatric

b.

Allopatric

c.

Neopatric

d.

Sibling

e.

Question does not provide sufficient data or is vague

Question number: 45

DNA and Evolution
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Question

MCQ▾

A segment of DNA has 120 adenine and 120 cytosine bases. The total number of nucleotides present in the segment is

Choices

Choice (5)Response

a.

360

b.

120

c.

480

d.

240

e.

All of the above

Question number: 46

DNA and Evolution
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Question

MCQ▾

Hereditary variations can be

Choices

Choice (5)Response

a.

not heritable

b.

influence by the environment

c.

stable

d.

impermanent

e.

All of the above