Point Mutations Simulation

Question 1 of 4

Activity 15.2 Quiz

A _______ mutation does not change to the structure and function of a polypeptide.

silent

frame-shift

missense

nonsense

Correct. See Key Concept 15.1 Mutations Are Heritable Changes in DNA

Incorrect. See Key Concept 15.1 Mutations Are Heritable Changes in DNA

Activity 15.2 Quiz

A mouse carrying a mutation in a gene produces a polypeptide shorter in length than the normal polypeptide encoded by the gene. Which two types of point mutations are candidates for the mechanism that could produce such a result?

Silent or frame-shift mutations

Frame-shift or missense mutations

Missense or nonsense mutations

Nonsense or frame-shift mutations

Correct. See Key Concept 15.1 Mutations Are Heritable Changes in DNA

Incorrect. See Key Concept 15.1 Mutations Are Heritable Changes in DNA

Activity 15.2 Quiz

Refer to the figure of a portion of a DNA molecule and its encoded amino acid sequence.

Which point mutation will cause the most change to the amino acid sequence?

A deletion of three bases, A-A-T

A substitution of C for G at the end of the G-G-G sequence

A deletion of one base, C, at the end of the G-C-C sequence

A substitution of G for T at the end of the A-A-T sequence

Correct. See Key Concept 15.1 Mutations Are Heritable Changes in DNA

Incorrect. See Key Concept 15.1 Mutations Are Heritable Changes in DNA

Activity 15.2 Quiz

Refer to the two DNA sequences shown.

Original: -G-C-T-T-A-G-T-C-C-A-G-T-A-
Mutation: -G-C-T-T-A-T-C-C-A-G-T-A-T-

The top sequence is the original DNA sequence and the bottom sequence is a mutated form of the original sequence. What type of mutation occurred to produce the mutated sequence?

Silent mutation

Frame-shift mutation

Missense mutation

Nonsense mutation

Correct. See Key Concept 15.1 Mutations Are Heritable Changes in DNA

Incorrect. See Key Concept 15.1 Mutations Are Heritable Changes in DNA

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Chapter 15. Point Mutations Simulation