Question 1

Mutations may have an effect on phenotype because

Accepted Answer

A)  they alter the stability of the DNA. 
B)  they change the amino acids encoded by the mRNA codon. 
C)  they remove information from the DNA code. 
D)  they alter the binding of transcription factors and change gene expression. 
E)  All of the answers are correct. 
A)  they alter the stability of the DNA. 
B)  they change the amino acids encoded by the mRNA codon. 
C)  they remove information from the DNA code. 
D)  they alter the binding of transcription factors and change gene expression. 
E)  All of the answers are correct.

Question 2

Which of the following statements is CORRECT?

Accepted Answer

A)  All chemical mutagens bind to DNA and interfere with replication. 
B)  New mutations are usually recessive. 
C)  Chemicals described as base analogues are mutagenic because they remove bases from the DNA backbone. 
D)  Deamination of cytosine to form uracil in the genome results in the production of a non-functional enzyme. 
E)  All of the answers are correct. 
A)  All chemical mutagens bind to DNA and interfere with replication. 
B)  New mutations are usually recessive. 
C)  Chemicals described as base analogues are mutagenic because they remove bases from the DNA backbone. 
D)  Deamination of cytosine to form uracil in the genome results in the production of a non-functional enzyme. 
E)  All of the answers are correct.

Question 3

Genes are being discovered using cDNA. cDNA is

Accepted Answer

A)  a direct copy of the DNA at a particular gene locus. 
B)  only useful if the gene product is an enzyme. 
C)  created from mRNA transcripts, and therefore does not include introns. 
D)  the complementary double-stranded DNA of a specific gene. 
E)  None of the answers are correct. 
A)  a direct copy of the DNA at a particular gene locus. 
B)  only useful if the gene product is an enzyme. 
C)  created from mRNA transcripts, and therefore does not include introns. 
D)  the complementary double-stranded DNA of a specific gene. 
E)  None of the answers are correct.

Question 4

When a cell has unrepaired DNA damage and progresses into mitosis, this can result in an increased rate of

Accepted Answer

A)  proliferation. 
B)  chromosome replication. 
C)  gene duplication. 
D)  All of the answers are incorrect. 
E)  chromosomal recombination. 
A)  proliferation. 
B)  chromosome replication. 
C)  gene duplication. 
D)  All of the answers are incorrect. 
E)  chromosomal recombination.

Question 5

DNA repair is most efficient in preventing perpetuation of mutations if it occurs

Accepted Answer

A)  during S phase. 
B)  during G2 phase. 
C)  prior to S phase. 
D)  after mitosis has occurred. 
E)  during Go. 
A)  during S phase. 
B)  during G2 phase. 
C)  prior to S phase. 
D)  after mitosis has occurred. 
E)  during Go.

Exam 13: Genomes, Mutation and Cancer

Mutations may have an effect on phenotype because

Which of the following statements is CORRECT?

Genes are being discovered using cDNA. cDNA is

When a cell has unrepaired DNA damage and progresses into mitosis, this can result in an increased rate of

DNA repair is most efficient in preventing perpetuation of mutations if it occurs

Nature of Molecules

Biomolecules

The Chemistry of Life

Functioning Cells

Movement Across Membranes

Harvesting Energy

Cells, Tissues and Signals

Cell Division

Inheritance

Genes, Chromosomes and Dna

The Genetic Code

Gene Expression

Viruses

Genetic Engineering and Biotechnology

Reproduction, Growth and Development of Flowering Plants

Structure of Plants

Plant Nutrition, Transport and Adaptation to Stress

Plant Hormones and Growth Responses

Animal Reproduction

Animal Development

Homeostasis: Water, Solutes and Excretion

Gas Exchange in Animals

Circulation

Metabolism, Temperature Regulation and Environmental Stress

Animal and Human Nutrition

Innate Defences and the Immune System

Hormonal Control in Animals

Nervous Systems

Animal Movement

Animal Behaviour

Evolving Life

Evolving Earth

Mechanisms of Evolution

Bacteria

The Protists

Plants

Fungi

Simple Animals: Sponges to Flatworms

Annelids, Molluscs, Nematodes and Arthropods

Echinoderms and Chordates

Australian Biota

Population Ecology

Living in Communities

Ecosystems

Human Impacts

Filters