Subject SAT (College Board) Biology: Questions 380 - 383 of 824

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Question number: 380

» DNA and Evolution

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MCQ▾

Question

Which of the following is true about Z-DNA helix?

Choices

Choice (5)Response

a.

It tends to be found at the 3’ end of the genes

b.

It has fewer base pairs per turn than B-DNA

c.

It has alternating GC sequences

d.

It is a permanent conformation of DNA

e.

All of the above

Question number: 381

» Organism and Population

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MCQ▾

Question

Decomposers are organisms that

Choices

Choice (5)Response

a.

Operate in living body and simplify organic substances of cells step by step

b.

Elaborate chemical substances, causing death of tissues

c.

Attack and kill plants as well as animals

d.

Operate in relay terms, simplifying step by step the organic constituents of dead body

e.

All of the above

Question number: 382

» Cell

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MCQ▾

Question

Which type of bonding is responsible for the secondary structure of proteins?

Choices

Choice (5)Response

a.

Peptide bonds between amino acids.

b.

Salt bridges between charged side chains of amino acids.

c.

Hydrogen bonding between the and groups of peptide bonds.

d.

Disulphide bridges between cysteine residues.

e.

All of the above

Question number: 383

» Atoms and Compounds

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MCQ▾

Question

A Lewis base is a…

Choices

Choice (5)Response

a.

lone pair donar

b.

lone pair acceptor

c.

proton acceptor

d.

proton donar

e.

None of the above

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