12.1 Mutations Reading Questions

12.1 Mutations Reading Questions

9th Grade

10 Qs

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12.1 Mutations Reading Questions

12.1 Mutations Reading Questions

Assessment

Quiz

Biology, Science

9th Grade

Medium

Created by

Elizabeth Ngo

Used 4+ times

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is nondisjunction?

Failure of genes to be passed on to future generations

A mutation caused by the environment

Failure of chromosomes to separate properly

A duplication of genes on a chromosome

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Mutations in DNA molecules can occur when —

replication of DNA is exact

a DNA enzyme attaches to an RNA codon

RNA codons are replaced by DNA nucleotides

a change occurs in DNA nucleotide bases

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Which of the following changes would be expected in the amino acid chain if the following mutation occurred?

(use the codon chart)

ACG GUC CCG - ACG GCC CCG

The amino acid sequence would be shorter than expected.

The identity of one amino acid would change

The amino acid sequence would remain unchanged.

The identities of more than one amino acid would change.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which part of DNA provides instructions for how to produce a protein?

The sequence of nitrogen bases

The sugar molecules

The phosphate groups

The bonds that hold the sugar and bases together

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Substitutions, insertions, and deletions are known as “point” mutations because they

change the genetic information of DNA

affect the structure of a chromosome

involve only a single nucleotide

change the amino acid that is inserted into a protein

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following can be a mutagen?

an inversion

a toxic chemical

a nucleotide

a random mutation

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The DNA sequence TTT codes for the amino acid lysine. The DNA sequence TTC also codes for lysine. What can you conclude from this information?

a deletion in the genetic instructions may not be significant

adding a nucleotide to a genetic sequence has no effect

any substitution that changes the genetic code affects a trait

this kind of substitution in the genetic code may go unnoticed

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