DNA STRUCTURE AND REPLICATION QUIZ

The higher order structure of DNA shows symmetry, whereas the higher order structures of most proteins do not. Why isn't protein shape more regular like DNA?

All of these

The many different amino acid R groups on proteins confer many different shapes.

Some S amino acids cause proteins to bend; others cause protein to flatten.

DNA has one main function in cells whereas proteins have many.

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The accepted hypothesis for DNA replication is

conservative theory

dispersive theory

semi-conservative theory

evolutionary theory

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In an agarose gel, DNA is moving from

anode to cathode

left to right

cathode to anode

A to B

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What does ligase do during replication of DNA?

Digests mRNA when it is no longer needed

Makes copies of mRNA from DNA

Synthesizes the lagging strand

Joins nicks in DNA strands

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DNAs when charged, migrate in a gel towards the

will not migrate

none of these

positive pole

negative pole

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The site on a bacterial chromosome that marks the initiation point for chromosome replication is called

an initiation codon

a promoter

Pro

Ori

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The packing ratio of nucleosomes is about

6

9

8

7

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DNA polymerases I also has

3'-5'exonuclease activity

5'-3' endonuclease activity

5'-3' exonuclease activity

both (a) and (b)

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Okazaki fragments occur on the and are bonded together by

tRNA, polymerase

Lagging strand, ligase

Leading strand, polymerase

mRNA, anticodons

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The overall conclusion of the Hershey-Chase experiment was that

phage DNA was similar to bacterial DNA

the ratio of Adenine to thymine was always the same

proteins and DNA were responsible for heredity

DNA was responsible for heredity

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