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Inorganic and Organic Biomolecules

DNA replicati...

Question

DNA replication includes which of the following enzymes?

A

DNA ligase

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B

DNA polymerase and ligase

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C

RNA polymerase and ligase

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D

All of the above

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Solution

The correct option is D All of the above
DNA polymerase and ligase as well as RNA polymerase and ligase have an important role in DNA replication. DNA replication, like all biological polymerization processes, proceeds in three enzymatically catalyzed and coordinated steps : initiation, elongation and termination. All enzymes mentioned play important roles in these steps of replication.

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Q. The type of RNA polymerase controlling DNA replication are

Q. Which of the following enzyme is used to lay the foundation for DNA polymerase to start the addition of dNTPs during DNA replication?

Q. How many of the following statements are correct ?

A. DNA dependent DNA polymerase requires DNA primer for initiating replication but DNA dependent RNA polymerase does not require any primer for transcription.

B. DNA dependent DNA polymerase requires RNA primer for initiating replication but DNA dependent RNA polymerase does not require any primer for transcription.

C. During replication, unwinding of DNA double helix forms a fork-like structure called replication fork.

D. During transcription, unwinding of the DNA double helix by DNA dependent RNA polymerase forms a transcription bubble.

E. During transcription, unwinding of DNA double helix by DNA dependent RNA polymerase forms a transcription fork.

Q. Which of the following statements is/are true with regards to DNA replication in E.coli?
a. It completes the process of replication within 18 minutes.
b. DNA polymerase catalyzes the polymerization very rapidly.
c. DNA polymerase catalyzes the reaction with a high degree of accuracy.

Q. Consider the following statements regarding characters of Archaebacteria that they share with eukaryotes:
I. The cell wall does not contain peptidoglycan.
II. DNA associated with histones.
III. Translation initiated with formylated methionine.
IV. RNA polymerase similar to eukaryotic RNA polymerase II
V. ATPase similarity
VI. Similar DNA replication and repair
How many of the above characters Archaebacteria share with eukaryotes?

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