13) Primase synthesizes primers made of A) Carbohydrate B) DNA C) Lipoprotein D)

Question

13) Primase synthesizes primers made of A) Carbohydrate B) DNA C) Lipoprotein D) Protein E) None of the above 14) Which enzyme replaces RNA primers with DNA during DNA replication? A) DNA polymerase I B) DNA polymerase III C) DNA polymerase Z D) DNA replacease E) None of the above 15) Which enzyme forms covalent bonds between newly synthesized Okazaki fragments? A) DNA ligase B) DNA polymerase I C) DNA polymerase II D) DNA polymerase III E) None of the above 16) Which term best describes the collection of enzymes working together at a replication fork? A) Helisome B) Polymerosome C) Replisome D) Transcriptome E) None of the above

Explanation / Answer

13.E. primase synthesizes primers made of RNA. All replication starts with RNA primer not DNA.

14.A. DNA Pol I replaces the primer during replication by Nick translation mechanism ( in prokaryotic system)

15.A. DNA lygase joins the okazaki fragments.

16. C. The enzyme complex working together in Replication called replisome

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