Subject SAT (College Board) Biology: Questions 199 - 203 of 805

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Question number: 199

» Cell

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MCQ▾

Question

Virus attacks a bacterium but neither multiplies nor does the bacterium die due to

Choices

Choice (4) Response

a.

Assimilation

b.

Viral stability

c.

Lysogeny

d.

Adsorption

Question number: 200

» DNA and Evolution

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MCQ▾

Question

Which one of the following is not uniform in all DNA molecules?

Choices

Choice (4) Response

a.

The pattern of the helix structure

b.

The arrangement of sugar-phosphate groups

c.

The sequence of nitrogenous bases on a strand of DNA

d.

The pairing of adenine with thymine and cytosine with guanine

Question number: 201

» Cell

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MCQ▾

Question

Select the correct option with respect to mitosis

Choices

Choice (4) Response

a.

Golgi complex and endoplasmic reticulum are still visible at the end of prophase

b.

Chromatids separate but remain in the centre of cell in anaphase

c.

Chromosomes move to spindle equator and get aligned along equatorial plate in metaphase

d.

Chromatids start moving towards opposite poles in telophase

Question number: 202

» Organism and Population

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MCQ▾

Question

Gymnosperms are NOT

Choices

Choice (4) Response

a.

Seed plants.

b.

Naked seed plants.

c.

Flowering plants.

d.

Conifers.

Question number: 203

» DNA and Evolution

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MCQ▾

Question

Plasmid vectors utilized in cloning often contain a gene for the N-terminal 146 amino acids of the enzyme β-galactosidase. What is the purpose of including this gene in the vector?

Choices

Choice (4) Response

a.

It enables the plasmid vector to replicate in E. coli host cells.

b.

It allows selection of E. coli host cells that contain plasmid in which the insert has been ligated.

c.

It cleaves the insert to allow it to be ligated into the vector.

d.

It allows selection of E. coli host cells that contain the plasmid.

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