DNA Structure and Replication

1

Which of the following does cytosine pair with?

Adenine

Thymine

Uracil

Guanine

1

Eukaryotes contain chromosomes, and prokaryotes contain a chromosome.

double-stranded linear; double-stranded circular

single-stranded circular; single-stranded linear

double-stranded circular; double-stranded linear

single-stranded linear; single-stranded circular

1

You isolate a cell strain in which the joining together of Okazaki fragments is impaired and suspect that a mutation has occurred in an enzyme found at the replication fork. Which enzyme is most likely to be mutated?

Helicase

DNA Polymerase III

Topoisomerase

Ligase

1

DNA replicates by which of the following models?

None of these

null

1

Which enzyme is responsible for proofreading the nucleic acid bases and correcting potential errors?

Ligase

Helicase

Telomerase

DNA Polymerase

1

Which enzyme is responsible for infinite cell division in some cell lines?

Telomerase

DNA Polymerase

Helicase

Ligase

1

Use Chargaff's rule to explain the data in the table above.

Since the %A and the %T are approximately the same in each sample, adenine and thymine molecules must pair up in a double-stranded DNA molecule.

Since the %C and the %T add up to approximately 50 percent in each sample, cytosine and thymine molecules must both contain a single ring.

Since the %A and the %G add up to approximately 50 percent in each sample, adenine and guanine molecules must pair up in a double-stranded DNA molecule.

Since the %(A+T) is greater than the %(G+C) in each sample, DNA molecules must have a poly-A tail at one end.

1

If 40% of the nucleotides in a DNA molecule are guanine, then what percent are expected to be thymine?

40%

20%

10%

30%

1

Which of the following most accurately demonstrates DNA replication at the replication fork?

null

1

If DNA underwent 3 rounds of Replication, what percent of the total DNA present would be compromised of the original DNA molecule?

12.5%

0%

6.25%

25%

1

Which of the following sequences shown below would be the matching new strand of the following DNA sequence: 5'-GATTCAA-3'

5'-CTAAGUU-3'

3'-CTAAGTT-5'

5'-CTAAGUU-3'

3'-CUAAGUU-5'

1

Which of the following statements regarding DNA is NOT true?

Adenine and guanine are pyrimidines

One end of a single stranded molecule ends with a phospahte and the other end has a deoxyribose

The basic unit is a nucleotide that contains deoxyribose

Guanine and cytosine always form 3 hydrogen bonds

1

Below is a segment of replicating DNA.
Which Strand is the template for discontinuous (lagging) strand synthesis?

A

B

C

D

DNA Structure and Replication

Which of the following does cytosine pair with?

Eukaryotes contain ________chromosomes, and prokaryotes contain a________ chromosome.

You isolate a cell strain in which the joining together of Okazaki fragments is impaired and suspect that a mutation has occurred in an enzyme found at the replication fork. Which enzyme is most likely to be mutated?

DNA replicates by which of the following models?

Which enzyme is responsible for proofreading the nucleic acid bases and correcting potential errors?

Which enzyme is responsible for infinite cell division in some cell lines?

Use Chargaff's rule to explain the data in the table above.

If 40% of the nucleotides in a DNA molecule are guanine, then what percent are expected to be thymine?

Which of the following most accurately demonstrates DNA replication at the replication fork?

If DNA underwent 3 rounds of Replication, what percent of the total DNA present would be compromised of the original DNA molecule?

Which of the following sequences shown below would be the matching new strand of the following DNA sequence: 5'-GATTCAA-3'

Which of the following statements regarding DNA is NOT true?

Below is a segment of replicating DNA. Which Strand is the template for discontinuous (lagging) strand synthesis?

Which of the following does cytosine pair with?

Eukaryotes contain ________chromosomes, and prokaryotes contain a________ chromosome.

You isolate a cell strain in which the joining together of Okazaki fragments is impaired and suspect that a mutation has occurred in an enzyme found at the replication fork. Which enzyme is most likely to be mutated?

DNA replicates by which of the following models?

Which enzyme is responsible for proofreading the nucleic acid bases and correcting potential errors?

Which enzyme is responsible for infinite cell division in some cell lines?

Use Chargaff's rule to explain the data in the table above.

If 40% of the nucleotides in a DNA molecule are guanine, then what percent are expected to be thymine?

Which of the following most accurately demonstrates DNA replication at the replication fork?

If DNA underwent 3 rounds of Replication, what percent of the total DNA present would be compromised of the original DNA molecule?

Which of the following sequences shown below would be the matching new strand of the following DNA sequence: 5'-GATTCAA-3'

Which of the following statements regarding DNA is NOT true?

Below is a segment of replicating DNA. Which Strand is the template for discontinuous (lagging) strand synthesis?

Eukaryotes contain chromosomes, and prokaryotes contain a chromosome.

Below is a segment of replicating DNA.
Which Strand is the template for discontinuous (lagging) strand synthesis?

Eukaryotes contain chromosomes, and prokaryotes contain a chromosome.

Below is a segment of replicating DNA.
Which Strand is the template for discontinuous (lagging) strand synthesis?