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Process of DNA Replication

New strand fo...

Question

New strand formation on a DNA template can be initiated only by

A

DNA polymerase

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B

DNA polymerase III

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C

RNA primer

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D

DNA primer

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Solution

The correct option is C RNA primer
New strand formation on a DNA template can be initiated only by RNA primer.

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Similar questions

Q. Which among the following statements is/are correct?

Statement 1: In the double-stranded DNA, only one strand serves as a template for the duplication of the new DNA.

Statement 2: Leading strand is continuously synthesised in 5’-3’ direction and lagging strand is discontinuously synthesised in 3’-5’ direction.

Statement 3: DNA polymerase reads the template strand in 5’-3’ direction.

Statement 4: Replication proceeds only in 5’-3’ direction

Choose the correct option

Q. How many of the following statements are correct with respect to transcription?

i) Both the strands of DNA function as template for transcription

ii) The transcribed strand separates from the template strand

iii) A primer is required for transcription

iv) A double stranded RNA is formed after transcription

v) RNA polymerase catalyses the process of transcription

Q. The DNA dependent DNA polymerases catalyse polymerisation only in one direction, that is ___(i)___. The replication is continuous on the template strand with polarity ___(ii)___ . Replication is discontinuous on the template strand with polarity ___(iii)___.

Select the correct option for (i), (ii) and (iii).
[0.7 mark]

Q. Consider these following sentences and choose the correct ones.
I. Each gene contains a specific promoter region and a leader sequence for guiding the beginning of transcription.
II. Only one strand for DNA, called template strand is copied by RNA polymerase this strand runs in

3^{'} \to 5^{'}

direction.
III. RNA polymerase adds complementary nucleotides forming single strand mRNA in

3^{'} \to 5^{'}

direction.
IV. Section of DNA that has been transcribed is rewound into its original configuration.

Q. Rearrange the following in the correct sequence to accomplish an important biotechnological reaction: [3]
(a) In vitro synthesis of copies of DNA of interest
(b) Chemically synthesized oligonucleotides
(c) Enzyme DNA-polymerase
(d) Complementary region of DNA
(e) Genomic DNA template
(f) Nucleotides provided
(g) Primers
(h) Thermostable DNA-polymerase (from Thermus aquaticus)
(i) Denaturation of ds-DNA

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