How does a frameshift mutation affect the reading frame of a gene?

It shifts the reading frame, altering the entire amino acid sequence downstream.

It does not affect the reading frame.

It only affects the first codon.

It replaces one amino acid with another.

Predict the effect of a substitution mutation that changes a codon from UUU to UUC.

It will have no effect on the protein (silent mutation).

It will result in a frameshift mutation.

It will cause a nonsense mutation.

It will change the protein structure significantly.

Analyze the impact of a deletion mutation in a gene coding for an enzyme.

The enzyme will be produced but with altered function.

The enzyme will be produced normally.

The enzyme will not be produced at all.

The enzyme will be produced with enhanced function.

Evaluate the importance of proofreading by DNA polymerase during replication.

It reduces the frequency of mutations by correcting errors.

It ensures the DNA is unwound properly.

It prevents the formation of Okazaki fragments.

It adds RNA primers to the DNA strand.

What is the consequence of a nonsense mutation in a gene?

It results in a shorter, nonfunctional protein.

It results in a longer protein.

It has no effect on the protein.

It changes one amino acid in the protein.

What is the effect of a silent mutation on a protein?

It has no effect on the protein's function.

It changes the protein's function.

It results in a nonfunctional protein.

It causes the protein to be longer.

Which of the following best describes a missense mutation?

A mutation that changes one amino acid in the protein.

A mutation that does not change the amino acid sequence.

A mutation that results in a premature stop codon.

A mutation that shifts the reading frame.

Discuss the potential effects of a frameshift mutation on protein synthesis.

It may result in a protein with a completely different amino acid sequence.

It will have no effect on the protein.

It will only affect the first amino acid.

It will result in a longer protein.

How does the enzyme helicase facilitate DNA replication?

It unwinds the DNA double helix.

It synthesizes new DNA strands.

What is the purpose of transcription?

To copy DNA into a molecule of mRNA.

To read a copy of mRNA to build a protien.

What is the purpose of the chart shown in the image?

To indicate what codon codes for each amino acid

To show the process of transcription

To display the different types of nucleic acids

A DNA mutation is a change in a DNA base sequence. This can occur if one or more extra bases are inserted or added into a DNA sequence, if one or more bases get replaced by different bases, or if one or more bases are lost or removed from a DNA sequence. Identify the deletion mutation if the NORMAL DNA sequence was: T A C A G G G C T C C C

Mutation 2 T A C G G G C T C C C

Mutation 1 T A C A G G G T T C C C

Mutation 3 T A C A G A G G C T C C C

A DNA mutation is a change in a DNA base sequence. This can occur if one or more extra bases are inserted or added into a DNA sequence, if one or more bases get replaced by different bases, or if one or more bases are lost or removed from a DNA sequence. Identify the insertion mutation if the NORMAL DNA sequence was: T A C A G G G C T C C C

Mutation 1: T A C T A G G G C T C C C

Mutation 2: T A G A G G G C T C C C

Mutation 3: T A G A G G C C T C C C

Exploring DNA: Structure and Mutations

Authored by BRITTANY COSSEY

Biology

9th Grade

NGSS covered

Used 12+ times

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29 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the shape of the DNA molecule?

Linear

Double helix

Circular

Zigzag

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following base pairs is correct according to the base pairing rules?

Adenine - Cytosine

Guanine - Thymine

Adenine - Thymine

Cytosine - Thymine

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During DNA replication, which enzyme is responsible for unwinding the DNA double helix?

DNA polymerase

Helicase

Ligase

Primase

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of DNA polymerase in DNA replication?

Unwinds the DNA strand

Joins Okazaki fragments

Synthesizes new DNA strands

Adds RNA primers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a type of point mutation?

Inversion

Deletion

Substitution

Duplication

What is the complementary strand for the DNA sequence 5'-ATCG-3'?

5'-TAGC-3'

3'-TAGC-5'

5'-CGAT-3'

3'-CGAT-5'

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following mutations is likely to have the most significant effect on a protein?

Silent mutation

Missense mutation

Nonsense mutation

Neutral mutation

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