DNA STRUCTURE AND REPLICATION QUIZ

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

bZIP

zinc finger

TFIID

helix-turn-helix

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

None of these

Chromosomes would get longer

Chromosomes would become progressively shorter

Nothing would happen

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DNA replication in eukaryotes occurs only in

M phase

G2 phase

G1 phase

S phase

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Which of the following in DNA replication and transcription are common?

synthesis in the 5'-3' direction

utilization the same enzyme

None of these

incorporation of deoxynucleotides

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Number of times the two DNA strands are interwined in circular DNA and is known as

twisting number

none of these

linking number

helix frequency

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Which will require a higher temperature to denature?

RNA with a high A-T content

DNA with a high A-T content

RNA with a high G-C content

DNA with a high G-C content

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DNA replication takes place in which direction?

3' to 5'

5 'to 3'

Randomly

Vary from organism to organism

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Proteins which help to open the double helix for DNA synthesis are

DNA helicases

ligase

DNA topoisomerase

single stranded binding proteins

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In DNA double helix, the two DNA chains are held together by

None of these

hydrogen bonds between the pair of bases

ionic bonds between the pair of bases

covalent bonds between the pair of bases

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Messelsen and Stahl model of replication was called

dispersive replication

semi-conservative replication

conservative replication

Cri du Chat

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