Question

Question 1 Complementary base pairing is the result of Question 1 options: hydrogen bonding the fact...

Question 1

Complementary base pairing is the result of

Question 1 options:

hydrogen bonding

the fact that complementary bases fit together physically

covalent bonding

ionic bonding

the fact that strands of DNA are wound around each other in a double helix

Question 2

During DNA replication, the function of RNA primers is to

Question 2 options:

open replication bubbles

serve as starting points for DNA strand elongation by DNA polymerase I in the 3' - 5' direction

serve as starting points for DNA strand elongation by DNA polymerase III

prevent new-separated strands of DNA from rejoining

serve as a binding site for DNA ligase

Question 3

Which of the following is a correct representation of a segment of DNA?

1. 5'ATTC3'
3'ATTC5'
4. 5'ATAG3'
3'TATC5'
2. 5'AUUC3'
3'UAAG5'
5. 5'ACGA3'
3'TGCT5'
3. 5'CCGG3'
5'GGCC3'

Question 3 options:

1

1 and 3

2 and 3

4 and 5

5 and 1

Question 4

A DNA nucleotide contains
1.      a cyclic nitrogen-containing part
2.      a single ring containing five carbons
3.      a part which contains four oxygen atoms surrounding a central atom.

In order, 1, 2 and 3 are

Question 4 options:

a base, a phosphate group, a sugar

a sugar, a base, a phosphate group

a base, a sugar, a phosphate group

a phosphate group, a sugar, a base

a sugar, a phosphate group, a base

Question 5

5'GGCATA(X)
(Z)CCGTAT(Y)

If the above is a representation of a piece of double-stranded DNA, what symbols should occupy the positions (X),(Y) and (Z)?

Question 5 options:

3',3',5'.

5',3',3'

5',3',5'

5',5',3'

3',5',3'

Question 6

If the percentage composition of thymine in a DNA molecule is 22%, what is the percentage composition of cytosine?

Question 6 options:

28%

32%

26%

22%

18%

Question 7

If a free phosphate is found at the 5' end of a DNA strand, what is found at the other end of the same strand?

Question 7 options:

a hydroxyl group on the 5' carbon of a deoxyribose sugar

a hydroxyl group on the 3' carbon of a deoxyribose sugar

a phosphate group on the 5' carbon of a deoxyribose sugar

a phosphate group on the 3' carbon of a deoxyribose sugar

a base attached to the 3' carbon of a deoxyribose sugar

Question 8

A mutant form of E. coli has been discovered in which replication is unsuccessful because the RNA primer is not released from the template strand. Which enzyme do you think is nonfunctional?

Question 8 options:

DNA polymerase III

primase

ligase

helicase

DNA polymerase I / RNAase H

Question 9

The paired bases of a DNA molecule are best described as

Question 9 options:

covalently linked across the width of the double helix

identical

mirror images

complementary

single-stranded

Question 10

In what order do the following molecules become involved in DNA replication?
1.      single-stranded binding proteins
2.      DNA polymerase III
3.      primase
4.      helicase

Question 10 options:

4,1,3,2

4,3,1,2

1,3,4,2

3,2,4,1

2,3,4,1

Homework Answers

Answer #1

1. Complementary base pairing is the result of Hydrogen bonding between the complementary bases in the DNA structure.

2. During DNA replication, the function of RNA primers is to serve as starting points for DNA strand elongation by DNA polymerase III. This short RNA primer provides the free 3'OH which required for DNA pol to work.

3. 4 and 5 is the correct representation of the segment of DNA.

4. a base, a sugar, a phosphate group, and this the part of nucleotide which is building block of DNA.

5. 3',5',3'

6. 28% cytosine will be there because according to chargaff's rule the composition of bases in DNA would be A=T and C=G

7. a hydroxyl group on the 3' carbon of a deoxyribose sugar

8. DNA polymerase I / RNAase H

9. complementary

10. 4,1,3,2

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
QUESTION 1 * Compared to the leading strand, the lagging strand requires ________ primers.?? A. more...
QUESTION 1 * Compared to the leading strand, the lagging strand requires ________ primers.?? A. more B. the same number of C. less QUESTION 2 * Which enzyme synthesizes the majority of the DNA polymer for both the leading and lagging strands??? A. DNA polymerase I B. primase C. DNA polymerase III D. helicase QUESTION 3 * For each origin of replication, how many DNA polymerase III enzymes are needed??? A. 1 B. 8 C. 4 D. 2 QUESTION 4...
The prokaryotic replication enzyme that removes and replaces primers is _______. a. ligase b. DNA polymerase...
The prokaryotic replication enzyme that removes and replaces primers is _______. a. ligase b. DNA polymerase I c. primase d. DNA polymerase II Primers are found on: a. only Okazaki fragments. b. both the leading and lagging strands. c. only the leading strand. d. only the lagging strand. e. DNA polymerase III. Which replication enzyme seals the nicks between Okazaki fragments? a. Primase b. DNA polymerase I c. DNA LIgase d. Topoisomerase The first step in the replication of DNA...
What can you infer from the information presented in this table? Proteins Involved in DNA Synthesis...
What can you infer from the information presented in this table? Proteins Involved in DNA Synthesis Process Protein Function Opening the helix Helicase SS binding proteins Topoisomerase Breaks hydrogen bonds between base pairs Stabilizes single-stranded DNA Breaks and rejoins DNA strand to untwist the double helix Synthesis of leading strand Primase DNA polymerase III Sliding clamp Catalyzes the synthesis of the RNA primer Adds bases to the growing DNA strand Holds DNA polymerase in place during strand elongation Synthesis of...
During DNA replication, DNA polymerase is only used to replicate the leading strand (Polymerase is not...
During DNA replication, DNA polymerase is only used to replicate the leading strand (Polymerase is not used on the lagging strand). True False The phrase "DNA replicating away from helicase" describes the lagging strand. True False The phosphate-sugar backbone connects nucleotides within a strand using ____ bonds between the phosphate of one nucleotide and carbon number ___ of the previous nucleotide. hydrogen..... 5' covalent..... 3' covalent..... 5' hydrogen..... 3' Which bonds are broken during DNA replication? hydrogen bonds phosphodiester bonds...
1. This enzyme replaces RNA primers with a compatible DNA segment. RNA Primase DNA Polymerase III...
1. This enzyme replaces RNA primers with a compatible DNA segment. RNA Primase DNA Polymerase III Topoisomerase DNA Polymerase I 2. This class of enzymes prevent DNA molecules from damaging themselves by relieving strain, untangling, cutting and rejoining strands. They will ride ahead of the replication fork preventing over-winding. Helicase DNA Ligase Topoisomerase RNA polymerase 3. This type of molecule prevents the two separated strands of DNA in a replication bubble from re-establishing their hydrogen bonds ("reannealing"). DNA Polymerase III...
Put the steps of initiation of DNA replication in their correct sequence.       -   ...
Put the steps of initiation of DNA replication in their correct sequence.       -       1.       2.       3.       4.       5.       DNA polymerase catalyzes the synthesis of new DNA by adding deoxyribonucleotides, beginning by attaching the first to the 3' hydroxyl (-OH) of the last ribonucleotide in the primer.       -       1.       2.       3.       4.       5.      ...
DNA can be distinguished from its “cousin” RNA because A. DNA is always single stranded B....
DNA can be distinguished from its “cousin” RNA because A. DNA is always single stranded B. DNA is always double stranded C. DNA is comprised of a base, a ribose sugar ring attached to a phosphate group D. RNA has an hydroxyl group on the 3’ carbon of its ribose ring structure E. DNA has an hydroxyl group on the 2’ carbon of its ribose ring structure F. RNA has an hydroxyl group on the 2’ carbon of its ribose...
DNA Replication 1. Define DNA replication. 2. What is the role of base pairing in DNA...
DNA Replication 1. Define DNA replication. 2. What is the role of base pairing in DNA replication? Would this process of replication be possible without base pairing? 3. Describe the process of semi-conservative DNA replication. 4. Describe the experiment that led to the discovery that DNA was replicated through a semi-conservative process. 5. Define replication origins. 6. Why is the specific sequence of the replication origin relevant to DNA replication? 7. Describe the process of DNA replication, including the enzymes...
1. Incubating a competent strain of Escherichia coli with DNA in the form of a plasmid...
1. Incubating a competent strain of Escherichia coli with DNA in the form of a plasmid could lead to: Group of answer choices A. Transformation B. Conjugation C. Transduction D. Vertical gene transfer 2. During DNA replication the lagging strand is synthesized: Group of answer choices A. Continuously B. In Okazaki fragments C. In the same direction as the advancing replication fork D. From 3' to 5' 3. Which enzyme is responsible for linking Okazaki fragments in a newly created...
QUESTION 21 Which molecule or enzyme mediates the process of Transcription? a. RNA Polymerase b. RIbosomes...
QUESTION 21 Which molecule or enzyme mediates the process of Transcription? a. RNA Polymerase b. RIbosomes c. Primase d. DNA Polymerase e. ribosomal RNA QUESTION 22 Which site of the tRNA molecule binds to the mRNA molecule? a. Poly-A tail b. anti-codon c. codon d. exon e. intron QUESTION 23 Which of the following accurately describes the Central Dogma? a. RNA to Protein to DNA b. DNA to Protein to RNA c. DNA to RNA to Protein d. Protein to...