Subject SAT (College Board) Biology: Questions 298 - 303 of 830

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Question 298

Question

MCQ▾

Sickle cell anemia is caused by a change in the amino acid sequence of the two beta chains in the hemoglobin molecule. How many amino acids have been changed in each beta chain, compared to normal hemoglobin?

Choices

Choice (5)Response

a.

5

b.

10

c.

100

d.

1

e.

None of the above

Question 299

Question

MCQ▾

If DNA has 10 spirals, the length of DNA will be

Choices

Choice (5)Response

a.

640 Å

b.

340 Å

c.

34 Å

d.

64 Å

e.

None of the above

Question 300

Question

MCQ▾

DNA is present in the

Choices

Choice (5)Response

a.

Nucleus and mitochondria

b.

Nucleus only

c.

Nucleus, mitochondria and chloroplast

d.

Nucleus and ER

e.

Question does not provide sufficient data or is vague

Question 301

Question

MCQ▾

Mosses and ferns are

Choices

Choice (5)Response

a.

Angiosperms of plant kingdom

b.

Thallophytes of plant kingdom

c.

Gymnosperms of plant kingdom

d.

Amphibians of plant kingdom

e.

Question does not provide sufficient data or is vague

Question 302

Question

MCQ▾

In a given diagram what A indicates?

What a Indicates in Diagram

Choices

Choice (5)Response

a.

Pteridophyta

b.

Metaphyta

c.

Bryophyta

d.

Protista

e.

Question does not provide sufficient data or is vague

Question 303

Question

MCQ▾

In a heterozygous monohybrid cross, the dominant trait can be expressed in the phenotype of the F1 ________ of the time.

Choices

Choice (5)Response

a.

Percent

b.

Percent

c.

Percent

d.

Percent

e.

Percent

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