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Copy of 4.) DNA Structure and Replication Questions (5/28/2026)

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Poslední aktualizace about 1 month ago
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Use your notes to complete the following questions.

Use your notes to complete the following questions.

2
2
1
3.5
2
2
2
5
2.5
Otázka 1
1.

Explain what is happening to the bottom DNA molecule, include the enzymes and proteins that are involved.

I will have to grade this.

Otázka 2
2.

Explain what is happening to the DNA molecule, include the enzymes that are involved.

I will have to grade this.

For 3-8, identify the nitrogenous bases.

Note the pattern of the hydrogen bonds (the number of dotted-lines) between those already labeled.

I must grade this.

Use the abbreviations

Adenine (A)

Thymine (T)

Guanine (G)

Cytosine (C)

0.5
Otázka 3
3.

Nitrogenous base

0.5
Otázka 4
4.

Nitrogenous base

0.5
0.5
0.5
0.5

Identify the labeled parts of the nucleotide for 9-11.

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Otázka 9
9.

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Otázka 10
10.

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Otázka 11
11.

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Otázka 12
12.

How many different varieties of #11 are there?

Otázka 13
13.

Click on the box that surrounds a complete and correct nucleotide.

Otázka 14
14.

a. In a single strand of DNA, the on one nucleotide binds to the deoxyribose of the next nucleotide.

b. Chargaff's rules states that the DNA of any organism contains equal proportions of and and equal proportions of and (I have to regrade this).

c. Logical thinking using Chargaff's rules - In a strand of DNA, if the percentage of adenine was 20%, the percentage of guanine in the same strand must be .

d. bonds connect the nitrogen bases of one strand to the nitrogen bases of the other strand of DNA.

Otázka 15
15.

Why is DNA replication called semi-conservative?

I must grade this.

Otázka 16
16.

What does it mean that the two strands of DNA molecule are complementary?

I must grade this.

Otázka 17
17.

Reorder the following steps from beginning to end.

  1. The enzyme DNA polymerase moves along the exposed strands and adds complementary nucleotides to each nucleotide in each existing strand.

  2. The DNA double helix breaks or unzips down the middle between the base pairs.

  3. Two new identical DNA molecules have been produced.

  4. A complementary strand is created for each of the two strands of the original double helix.

Otázka 18
18.

Below is one-half of a DNA molecule.

Create the complementary strand (you must use UPPERCASE LETTERS).

Use the abbreviations

  • Adenine (A)

  • Thymine (T)

  • Guanine (G)

  • Cytosine (C)

A

T

G

C

A

A

A

T

T

G

C

T

C

A

C

C

G

G

G

G

A

T

C

A

G

Otázka 19
19.

Match each item with its correct description.

Přetahovatelná položkaarrow_right_altOdpovídající položka

DNA Ligase

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Unwinds and separates the double-stranded DNA

Topoisomerase

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Adds complementary DNA nucleotides to a growing DNA strand

DNA Polymerase

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Joins Okazaki fragments on the lagging strand

DNA Helicase

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Synthesizes a short RNA primer

Primase

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Relieves tension in the DNA strands ahead of the replication fork.

Otázka 5
5.

Nitrogenous base

Otázka 6
6.

Nitrogenous base

Otázka 7
7.

Nitrogenous base

Otázka 8
8.

Nitrogenous base