Cell [Subject SAT (College Board) Biology]: Questions 146 - 149 of 192

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Question 146

Cell
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Question

MCQ▾

Chemosynthetic bacteria do not need sunlight to grow because

Choices

Choice (5)Response

a.

They prepare their food without the help of light

b.

They do not like sunlight for brightness

c.

Due to the absence of chlorophyll they are incapable of manufacturing their own food

d.

They use other food materials manufactured by other bacteria

e.

All of the above

Question 147

Cell
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Question

MCQ▾

Chromosomes at anaphase are of various shapes depending upon position of centromere. It is J shaped when centromere is

Choices

Choice (5)Response

a.

submetacentric

b.

acrocentric

c.

metacentric

d.

telocentric

e.

Question does not provide sufficient data or is vague

Question 148

Cell
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Question

MCQ▾

Tailed bacteriophage is

Tailed bacteriophages

Tailed Bacteriophages

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Choices

Choice (5)Response

a.

Actively motile in water

b.

Non-motile

c.

Motile on surface of plant leaves

d.

Motile on bacterial surface

e.

All of the above

Question 149

Cell
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Question

MCQ▾

Which of the following statements correctly describes the behavior of the hemoglobin protein in sickle-cell disease?

Choices

Choice (5)Response

a.

The haemoglobin protein lacks a haem group.

b.

The haemoglobin protein dissociates into four subunits.

c.

The haemoglobin protein possesses an iron atom in the Fe (III) form rather than the normal Fe (II) form.

d.

Neighbouring haemoglobin proteins aggregate together.

e.

Question does not provide sufficient data or is vague