DNA STRUCTURE AND REPLICATION QUIZ

Proteins involved in opening a replication bubble are

single stranded binding proteins

ligase

DNA helicases

DNA topoisomerase

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An important difference between eukaryotic and prokaryotic DNA replication is

eukaryotic DNA polymerases are faster

multiple origins of replication in eukaryotes

RNA primers are not required in eukaryotes

more DNA polymerases are found in eukaryotes

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In the study of one experiment it was found that the value of Tm for DNA is = 40° C. If the cell has 20% GC at the above Tm, then what will be value of 'Tm' if the GC% increases to 60%?

Decreases

Can not be compared

Remains same

Increases

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

X-DNA

A-DNA

Z-DNA

B-DNA

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

G1,S, G2 and M phases

S, G2 and M phases

G1, G2 and M phases

G2 and M phases

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DNA with a G-C content of 50% will melt at approximately

60°C

100 °C

90 °C

70 °C

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Which of the following is an active site on its single polypeptide chain for DNA Polymerase I?

All of these

3' → 5' exonuclease

5' → 3' polymerase

5' → 3' exonuclease

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What is the name given to the points at which a DNA helix is unwound and new strands develop?

Okazaki fragments

Leading strands

Replication forks

Replication origins

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Messelsen and Stahl model of replication was called

semi-conservative replication

conservative replication

dispersive replication

Cri du Chat

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DNA segments capable of moving from one place in the genome to another is known as

transposons

introns

retrovirus

moving elements

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