Subject SAT (College Board) Biology: Questions 161 - 165 of 805

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Question number: 161

» DNA and Evolution

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MCQ▾

Question

Which of the following statements is true about mutations?

Choices

Choice (4) Response

a.

Only certain gene locations are affected.

AND

Generally lethal

b.

Source of genetic variation

c.

Irreversible

AND

Rates tend to be very high in most populations.

d.

All a. , b. and c. are correct

Question number: 162

» Cell

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MCQ▾

Question

Which of the following statement/s regarding coelenterates is/are wrong?

  1. Cnidocytes are present on the tentacles and on the body

  2. Diploblastic with cellular level of organization

  3. Polyps produce medusa sexually and medusa form polyps asexually

  4. Polyp form-s are free living

Choices

Choice (4) Response

a.

1,2 and 3

b.

2 and 3 only

c.

1 and 2 only

d.

2,3 and 4

Question number: 163

» Organism and Population

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MCQ▾

Question

Identify the following organelle and choose the correct option

Identify the following organelle

Identify the Following Organelle

Identify the following organelle

Choices

Choice (4) Response

a.

A- Matrix, B- Thylakoid

b.

A- Matrix, B- Granum

c.

A- Cytoplasm, B- Thylakoid

d.

A- Stroma, B- Granum

Question number: 164

» Mendel and Hereditary

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MCQ▾

Question

Trisomy in humans is the result of

Choices

Choice (4) Response

a.

Nondisjunction.

b.

Pleiotropy.

c.

Epistasis.

d.

Polygenic inheritance.

Question number: 165

» Cell

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MCQ▾

Question

The number of chromatids in a chromosome at metaphase is

Choices

Choice (4) Response

a.

two in mitosis and two in meiosis

b.

one in mitosis and two in meiosis

c.

two in mitosis and four in meiosis

d.

two in mitosis and one in meiosis

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