Module 6

Question 1

What is a gene mutation

Answer 1

Change in the sequence of base pairs in a DNA molecule in a DNA molecule

Question 2

What increases the prob of mutations

Answer 2

Mutagens

Question 3

Why do mutations have no effect

Answer 3

Mutations do not alter the polypeptide so the structure has not changed

Question 4

When does a INSERTION mutation occur

Answer 4

When a nucleotide is randomly inserted into the DNA sequence

Question 5

What is an INSERTION mutation

Answer 5

Changes the amino acid that would have been coded for by the original base triplet

Question 6

What is a deletion mutation

Answer 6

Where a nucleotide is randomly deleted from DNA sequence

Question 7

What is sub mutation

Answer 7

Base in DNA sequence is randomly swapped for a different base

Question 8

What makes sub mutation different from insertion and deletion

Answer 8

Sub only change the aminos acid for the triplet

Question 9

What is silent mutation

Answer 9

Type of sub mutation where mutation does not alter the amino acid sequence

Question 10

What is missense mutations

Answer 10

Type of sub mutation where mutation alters a single amino acid

Question 11

What is nonsense mutations

Answer 11

Type of sub mutation where mutations creates a premature stop codon

Question 12

What is a structural gene

Answer 12

Codes for a protein that has a function within a cell

Question 13

Lac operas controls….

Answer 13

Production of lactase

Question 14

What is an inducible enzyme

Answer 14

Only synthesized when lactose is present

Question 15

How does the operator stop transcriptions

Answer 15

As RNA polymerase cannot attach to the promoter