Subject SAT (College Board) Biology: Questions 770 - 776 of 805

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Question number: 770

» DNA and Evolution

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MCQ▾

Question

The main role of enhancer is to

Choices

Choice (4) Response

a.

bind RNA polymerase

b.

serves as CAT box binding proteins

c.

work adjacent to the TATA box

d.

modulate transcription

Question number: 771

» Atoms and Compounds

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MCQ▾

Question

The oxygen evolved during photosynthesis comes from water molecule. Which one of the following pair of elements gets involved in the reaction?

Choices

Choice (4) Response

a.

Magnesium and chlorine

b.

Manganese and chlorine

c.

Manganese and potassium

d.

Magnesium and molybdenum

Question number: 772

» Atoms and Compounds

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MCQ▾

Question

Enzymes are

Choices

Choice (4) Response

a.

Make endergonic reactions proceed spontaneously

b.

Lower the activation energy of a reaction

c.

Are not very specific in their choice of substrates

d.

Are needed in large quantities because they are used up during catalysis

Question number: 773

» DNA and Evolution

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MCQ▾

Question

Essentiality in Rho-dependent termination of transcription in E. coli

Choices

Choice (4) Response

a.

ATP

b.

Nearly 50 nucleotides of uncomplexed mRNA

c.

Both a. and b. are correct

d.

None of the above

Question number: 774

» Atoms and Compounds

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MCQ▾

Question

Anoxygenic photosynthesis is a characteristic of

Choices

Choice (4) Response

a.

Ulva

b.

Rhodospirillum

c.

Chlamydomonas

d.

Spirogyra

Question number: 775

» Organization and Regulation

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MCQ▾

Question

Oxygenic photosynthesis occurs in

Choices

Choice (4) Response

a.

Phodospirillum

b.

Oscillatoria

c.

Chlorobium

d.

Chromatium

Question number: 776

» Atoms and Compounds

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MCQ▾

Question

Which of the following statements is false with respect to an enzyme’s ability to catalyses a reaction?

Choices

Choice (4) Response

a.

An enzyme binds reactants such that they are positioned correctly and can achieve their transition-state configurations.

b.

An enzyme provides a reaction surface and a suitable environment for the reaction to take place.

c.

Enzyme can weaken bonds in reactants through the binding process.

d.

An enzyme allows the reaction to endure a less stable transition state than would normally be the case.

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