Question

BioLoG 11. chose the order below that most closely represents the order in which the following proteins participate in DNA replication. a. helicase, single stranded binging protein, primase DNA polymerase b. single -stranded binding protein, primase DNA polymerase helicase c. primase, DNA polymerase, single- stranded binding protein, helicase d. helicase, single- stranded binding protein DNA polymerase, primase. 12. what is the function of the enzyme primase during DNA replication? a. to unwind the double helix to prime it for replication b. to prime DNA for replication by preventing the formation of knots c. to add complementary nucleotides to a growing strand of DNA d. to assemble a RNA primer at the origin of application site e. to correct errors made during DNA replication 13. the short DNA segments formed on the discontinuously replicated strand are called a. Kawasaki fragments b. Nagasaki fragments c. Miyazaki fragments d. Okasaki fragments e. Suzuki fragments 14. which of the following best describes transcription? a. DNA- DNA b. DNA RNA c. DNA- protein 15. The enzyme that accomplish transcription is termed a. DNA polymerase. b. RNA polymerase. c. DNA ligase. d. RNA replicase 16. The transcription enzyme first attaches to the. .. of the gene a. coding region b. promoter region c. operator d. regulator e. initiator

Answer 1

Q11) Choose the order below that most closely represents the order in which the following proteins participate in DNA replication?

Answer- a, Helicase, single stranded binding protein, primase, DNA polymerase.

Explanation:- During DNA replication first there is unwinding of the DNA double helix occurs, it takes place by helicase ,

Than the single stranded binding proteins coat the separated strands of DNA near the replication fork, they prevent rewinding of DNA.

Primase makes a RNA primer complementary to the DNA strand. It gives a 3’ end to the DNA polymerase, here the DNA polymerase can attach.

DNA polymerase- It adds nucleotides one by one to make a new DNA, it is complementary to the template strand.

Q12) What is the function of the enzyme primase during DNA replication?

Answer:- C, To assemble a RNA primer at the origin of application site.

Explanation:- Primase creates a primer on a DNA strand by adding RNA nucleotides complementary to the DNA template, it works 5’to 3’ direction, so it replicates the leading strand continuously.

Q13) The short DNA segments formed on the discontinuously replicated strand are called?

Answer- D- Okasaki fragments.

Explanation:- These are the short sequences of DNA nucleotides synthesized discontinuously, they are latter gets attached by DNA ligase enzyme to create a lagging strand during DNA replication.

Q14) Which of the following best describes transcription?

Answer- B- DNA ->RNA.

Explanation:- In transcription the DNA sequence of a gene is copied to make an RNA molecule. So here DNA acts as a template.

Q15) The enzyme that accomplishes transcription?

Answer- B- RNA polymerase.

Explanation:- RNA polymerase is the enzyme which helps in the conversion of DNA to RNA, by linking nucleotides to form a RNA using DNA as a template strand.

Q16) The transcription enzyme first attaches to the _______ of the gene.

Answer:- B- Promoter region.

Explanation:- Transcription begins when RNA polymerase binds to a promoter sequence near the beginning of the gene (gets attached either directly or with the help of a helper protein)