DNA STRUCTURE AND REPLICATION QUIZ

Without telomerase, what would happen to the ends of chromosomes after each round of replication?

Nothing would happen

Chromosomes would get longer

Chromosomes would become progressively shorter

None of these

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Which of the following is not a structural motif in DNA binding proteins?

TFIID

bZIP

zinc finger

helix-turn-helix

TRUE ANSWER : ?
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An RNA primer is synthesized by

DNA helicases

ligase

primase

DNA topoisomerase

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Messelsen and Stahl model of replication was called

conservative replication

semi-conservative replication

Cri du Chat

dispersive replication

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The nicks or gaps between Okazaki fragments are eventually sealed by

polymerase

DNA ligase

gyrase

RNA ligase

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DNA helicase is used to

unwind the double helix

None of these

break a phosphodiester bond in DNA strand

interact the double helix closely

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Nucleosome is

an hexamer of three histones without H1 protein

an octamer of four histones without H1 protein

an hexamer of three histones with H1 protein

an octamer of four histones with H1 protein

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For the DNA replication in eukaryotes, the cell cycle consists of

G1,S, G2 and M phases

G1, G2 and M phases

S, G2 and M phases

G2 and M phases

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Which of the following would not contain DNA?

Mold

Bacteria

Glass crystals

Yeast

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What is the exact name of the classical Watson-Crick double helix DNA?

A-DNA

X-DNA

B-DNA

Z-DNA

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