Question 1

List three ways in which an RNA molecule differs from a DNA molecule.

Accepted Answer

RNA is normally single-strande

Question 2

Which of the following contains codons?

Accepted Answer

A) ribosomal RNA 
B) DNA 
C) messenger RNA 
D) transfer RNA 
E) RNA polymerase 
A) ribosomal RNA 
B) DNA 
C) messenger RNA 
D) transfer RNA 
E) RNA polymerase

Question 3

If a bacterial protein is made from 30 amino acids, how many nucleotides are needed to code for its production?

Accepted Answer

A) 30 
B) 60 
C) 90 
D) 120 
E) 600 
A) 30 
B) 60 
C) 90 
D) 120 
E) 600

Question 4

How many bases are in a codon?

Accepted Answer

A) 3 
B) 4 
C) 20 
D) 64 
A) 3 
B) 4 
C) 20 
D) 64

Question 5

The genetic code is:

Accepted Answer

A) different in different organisms. 
B) read in sets of three bases called codons. 
C) used during the translation of DNA to mRNA. 
A) different in different organisms. 
B) read in sets of three bases called codons. 
C) used during the translation of DNA to mRNA.

Question 6

Both DNA and RNA:

Accepted Answer

A) are single-stranded molecules. 
B) contain the same four types of nitrogen-containing bases. 
C) have the same five-carbon sugars. 
D) contain phosphate groups. 
E) cannot be present in a cell simultaneously. 
A) are single-stranded molecules. 
B) contain the same four types of nitrogen-containing bases. 
C) have the same five-carbon sugars. 
D) contain phosphate groups. 
E) cannot be present in a cell simultaneously.

Question 7

If the sequence of bases in a section of DNA is TAGGCTAA, what is the corresponding sequence of bases in mRNA?

Accepted Answer

A) ATCCGATT 
B) TAGGCTAA 
C) CGAAUCGG 
D) AATCGGAT 
E) AUCCGAUU 
A) ATCCGATT 
B) TAGGCTAA 
C) CGAAUCGG 
D) AATCGGAT 
E) AUCCGAUU

Question 8

What does mRNA carry away from the nucleus?

Accepted Answer

A) enzymes 
B) ribosomes 
C) information 
D) amino acids 
E) tRNA 
A) enzymes 
B) ribosomes 
C) information 
D) amino acids 
E) tRNA

Question 9

Which of the following is found in RNA but NOT in DNA?

Accepted Answer

A) adenine 
B) uracil 
C) thymine 
D) phosphate groups 
E) deoxyribose 
A) adenine 
B) uracil 
C) thymine 
D) phosphate groups 
E) deoxyribose

Question 10

Describe the three basic steps or processes involved in transcription.

Accepted Answer

First, initiation involves RNA polymeras

Question 11

A codon of mRNA consists of three bases that code for an amino acid. True or False?

Accepted Answer

A) True 
 B)False

Question 12

Which of the following attaches to specific amino acids?

Accepted Answer

A) ribosomal RNA 
B) DNA 
C) messenger RNA 
D) transfer RNA 
E) RNA polymerase 
A) ribosomal RNA 
B) DNA 
C) messenger RNA 
D) transfer RNA 
E) RNA polymerase

Question 13

A gene mutation is defined as change in the:

Accepted Answer

A) nucleotide sequence of RNA. 
B) nucleotide sequence of DNA. 
C) activation of a gene. 
D) structure of ribosomes. 
A) nucleotide sequence of RNA. 
B) nucleotide sequence of DNA. 
C) activation of a gene. 
D) structure of ribosomes.

Question 14

Which of the following has two polynucleotide strands?

Accepted Answer

A) ribosomal RNA 
B) DNA 
C) messenger RNA 
D) transfer RNA 
E) RNA polymerase 
A) ribosomal RNA 
B) DNA 
C) messenger RNA 
D) transfer RNA 
E) RNA polymerase

Question 15

Which of the following is TRUE regarding gene expression?

Accepted Answer

A) Gene expression remains constant throughout an organism's life span. 
B) Different individuals of the same species express all of the same genes. 
C) Gene expression is not influenced by the environment. 
D) Different tissues within an organism express different genes. 
A) Gene expression remains constant throughout an organism's life span. 
B) Different individuals of the same species express all of the same genes. 
C) Gene expression is not influenced by the environment. 
D) Different tissues within an organism express different genes.

Question 16

A gene can be mutated with no resulting functional change in the protein that is produced from that gene if:

Accepted Answer

A) the mutation alters the active site of an enzyme. 
B) a codon has changed, but it codes for the same amino acid as the original codon. 
C) an entire codon has been removed. 
D) RNA polymerase can edit the mutation from the mRNA produced during translation. 
A) the mutation alters the active site of an enzyme. 
B) a codon has changed, but it codes for the same amino acid as the original codon. 
C) an entire codon has been removed. 
D) RNA polymerase can edit the mutation from the mRNA produced during translation.

Question 17

Suppose one strand of a "mini-gene" has the base sequence TACCCGGATTCA. If we assume no introns are involved, how many amino acids does the polypeptide encoded by this gene have?

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 12 
A) 2 
B) 4 
C) 6 
D) 12

Question 18

The anticodon for AUC is ________.

Accepted Answer

The answer of The anticodon for AUC is ________....

Question 19

A "mini-gene" has the base sequence TACCCGTGCACG. Which of the following sequences represents a single base substitution?

Accepted Answer

A) TACCCGTGCACG 
B) TACCCGAGCACG 
C) TACCCGGCACG 
D) TACCCGTGTCACG 
E) TACCGTGCTACG 
A) TACCCGTGCACG 
B) TACCCGAGCACG 
C) TACCCGGCACG 
D) TACCCGTGTCACG 
E) TACCGTGCTACG

Question 20

Which of the following contains four types of nucleotides but no uracil?

Accepted Answer

A) ribosomal RNA 
B) DNA 
C) messenger RNA 
D) transfer RNA 
E) RNA polymerase 
A) ribosomal RNA 
B) DNA 
C) messenger RNA 
D) transfer RNA 
E) RNA polymerase

Exam 12: Gene Expression and Regulation

List three ways in which an RNA molecule differs from a DNA molecule.

Which of the following contains codons?

If a bacterial protein is made from 30 amino acids, how many nucleotides are needed to code for its production?

How many bases are in a codon?

The genetic code is:

Both DNA and RNA:

If the sequence of bases in a section of DNA is TAGGCTAA, what is the corresponding sequence of bases in mRNA?

What does mRNA carry away from the nucleus?

Which of the following is found in RNA but NOT in DNA?

Describe the three basic steps or processes involved in transcription.

A codon of mRNA consists of three bases that code for an amino acid. True or False?

Which of the following attaches to specific amino acids?

A gene mutation is defined as change in the:

Which of the following has two polynucleotide strands?

Which of the following is TRUE regarding gene expression?

A gene can be mutated with no resulting functional change in the protein that is produced from that gene if:

Suppose one strand of a "mini-gene" has the base sequence TACCCGGATTCA. If we assume no introns are involved, how many amino acids does the polypeptide encoded by this gene have?

The anticodon for AUC is ________.

A "mini-gene" has the base sequence TACCCGTGCACG. Which of the following sequences represents a single base substitution?

Which of the following contains four types of nucleotides but no uracil?

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

The Continuity of Life: Cellular Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amidst Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

How Do Ecosystems Work

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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