DNA Structure and Replication

DNA Structure and Replication

9th Grade

20 Qs

quiz-placeholder

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DNA Structure and Replication

DNA Structure and Replication

Assessment

Quiz

Science

9th Grade

Practice Problem

Hard

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20 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the role of DNA polymerase I in DNA replication?

DNA polymerase I synthesizes new DNA strands.

DNA polymerase I removes RNA primers and fills in the gaps with DNA nucleotides.

DNA polymerase I unwinds the DNA double helix.

DNA polymerase I repairs damaged DNA strands.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What occurs during the initiation step of DNA replication?

The DNA strand is unzipped by DNA Helicase.

DNA polymerase synthesizes the new DNA strand.

The DNA strands are completely separated by ligase.

Nucleases degrade the RNA primers.

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the function of single-strand binding proteins in DNA replication?

They stabilize the unwound DNA strands, preventing them from re-annealing.

They initiate the replication process by unwinding the DNA helix.

They provide the energy required for DNA synthesis.

They repair any errors in the DNA sequence during replication.

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which type of bond joins nitrogenous bases in DNA?

Ionic bonds

Covalent bonds

Hydrogen bonds

Metallic bonds

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the significance of complementary base pairing in DNA?

It ensures accurate replication and transcription of genetic information.

It allows for the formation of hydrogen bonds between nucleotides.

It prevents mutations from occurring during DNA synthesis.

It facilitates the binding of RNA polymerase to DNA.

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What are the three components of a nucleotide?

A phosphate group, a sugar (deoxyribose), and a nitrogenous base.

A phosphate group, a sugar (ribose), and an amino acid.

A nitrogenous base, a sugar (deoxyribose), and a fatty acid.

A phosphate group, a sugar (glucose), and a nitrogenous base.

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What are the four nitrogenous bases in DNA?

Adenine (A), Thymine (T), Cytosine (C), Guanine (G)

Adenine (A), Uracil (U), Cytosine (C), Guanine (G)

Adenine (A), Thymine (T), Cytosine (C), Uracil (U)

Cytosine (C), Thymine (T), Guanine (G), Uracil (U)

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