DNA Replication

Semi-conservative model

Education

2 plays

16 questions

WHAY.CHUIN

•about 5 years ago

Question 1

Multiple Choice

10 points

Which of the following statements best explains the mechanism for DNA replication?

DNA replication is reductive, because half the total DNA present is copied.

DNA replication is semi-conservative, because each DNA strand serves as a template during replication.

DNA replication is dispersive, because the two resulting DNA molecules are mixtures of parent and daughter DNA.

DNA replication is conservative, because one resulting molecule is identical to the original and the other consists of two new strands.

Question 2

Multiple Choice

10 points

Which diagram illustrates the semi-conservative model of DNA replication?

Question 3

Multiple Choice

10 points

What is the starting point in replication called?

A.Race start!

B.Promoter

C.Origin

D.Terminator

Question 4

Multiple Choice

10 points

In DNA replication, DNA "unwinds" to form two template strands: the leading strand and the lagging strand. Which of the following statements about these strands is true?

A.Okazaki fragments are used to synthesize the leading strand of DNA.

B.The leading strand of DNA is synthesized continuously.

C.DNA polymerase can only synthesize DNA on the leading strand.

D. The lagging strand can only be synthesized once the leading strand has been completed.

Question 5

Multiple Choice

10 points

What type of bond does helicase break?

A.phosphodiester bond

B.peptide bond

C.hydrogen bond

D.ester bond

Question 6

True/False

10 points

The G-C base pairs would be harder to split.

A.True

B.False

Question 7

Multiple Choice

10 points

Which structure is single-strand binding (SSB) protein?

A.1

B.2

C.3

D.4

Question 8

Multiple Choice

10 points

Which of the following enzymes remove supercoiling in replicating DNA ahead of the replication fork?

A.5

B.6

C.7

D.8

Question 9

Drag and Drop into Text

10 points

[[1]] catalyze the addition of [[2]] nucleotides that complementary to the [[3]] template to form RNA [[4]].

primase

RNA

DNA

primer

Question 10

Multiple Choice

10 points

What is the function of the enzyme DNA polymerase III?

A.gluing together Okazaki fragments.

B.adding free DNA nucleotides during replication.

C.unzipping the two strands of DNA.

D.stabilizing the single strand DNA.

Question 11

Short Answer

10 points

Based on the diagram, the first DNA nucleotide will be added by DNA polymerase III is

Question 12

Multiple Choice

10 points

What will be the complementary strand of the following: 5'-ATGCGTACG-3'

A.5'-ATGCGTACG-3'

B.3'-TACGCATGC-5'

C.5'-TACGCATGC-3'

D.3'-UACGCAUGC-5'

Question 13

Multiple Choice

10 points

The mechanism of DNA replication is studied in a replication fork. Which is a characteristic of this replication fork?

A.Strands I and II have base sequences that are identical to each other.

B.Strands II and IV have an antiparallel orientation as the fork moves to the right.

C.Strands I and III will be covalently bonded to each other when replication is completed.

D.Strands III and IV will be H-bonded to each other when replication is completed.

Question 14

Multiple Choice

10 points

_________ removes the RNA primer and replace it with DNA nucleotides.

A.DNA polymerase I

B.DNA polymerase III

C.DNA ligase

D.Primase

Question 15

Multiple Choice

10 points

Which protein can catalyze the formation of phosphodiester bonds?

A.DNA ligase

B.DNA polymerase I

C.DNA polymerase III

D.Helicase

Question 16

Multiple Choice

10 points

Which of the following is true about DNA polymerase?

A.It can synthesize DNA in the 5’ to 3’ direction.

B.It can synthesize DNA in the 3’ to 5’ direction.

C.It can synthesize mRNA in the 3’ to 5’ direction.

D.It can synthesize mRNA in the 5’ to 3’ direction.