AP (Advanced Placement) Biology: Questions 621 - 624 of 868

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Question number: 621

» DNA and Protein Synthesis

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MCQ▾

Question

How many codons totally are present in a genetic dictionary?

Choices

Choice (5)Response

a.

32

b.

16

c.

36

d.

42

e.

64

Question number: 622

» Respiratory Systems

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MCQ▾

Question

Sperm is a microscopic, motile structure composed of the following except

Choices

Choice (5)Response

a.

Endoplasmic reticulum

b.

Acrosome

c.

Centriole

d.

Mitochondria

e.

Axial filament

Question number: 623

» Specialized Cell and Tissues

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MCQ▾

Question

Which of the following statement differentiates a cardiac muscle cell from a skeletal muscle cell?

Choices

Choice (5)Response

a.

A cardiac muscle cell contracts slowly, whereas a skeletal muscle cell contracts rapidly.

b.

A cardiac muscle cell is unbranched, whereas a skeletal muscle cell is branched.

c.

A cardiac muscle cell is branched, whereas a skeletal muscle cell is unbranched.

d.

Cardiac muscle cells are nonstriated, whereas skeletal muscle cells are striated

e.

The nucleus of a cardiac muscle cell is within the sarcoplasm, whereas the nucleus of a skeletal muscle cell lies on the periphery of the cell.

Question number: 624

» Genetics

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MCQ▾

Question

What would be the effect if a person suffers from a deletion mutation in a gene that codes for a single tRNA?

Choices

Choice (5)Response

a.

There would be significant changes in all proteins.

b.

These mutations improve functioning of cells.

c.

All proteins would be affected but still they remain functional.

d.

This mutation is lethal and person will not survive.

e.

There would be no phenotypic changes observed.

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