Question 1

What are the non-coding segments of DNA called?

Accepted Answer

A)  introns 
B)  exons 
C)  inseqs 
D)  excisors 
E)  incisors 
A)  introns 
B)  exons 
C)  inseqs 
D)  excisors 
E)  incisors A

Question 2

To which of the following books does DNA compare?

Accepted Answer

A)  a novel 
B)  a mathematics textbook 
C)  a cookbook 
D)  a travel guide 
E)  a biography 
A)  a novel 
B)  a mathematics textbook 
C)  a cookbook 
D)  a travel guide 
E)  a biography C

Question 3

Of all the different codons that exist, three of them

Accepted Answer

A)  are not used in any organisms. 
B)  do not code for an amino acid. 
C)  code for non-functional amino acids. 
D)  signify 'start here'. 
E)  do more than one of these things. 
A)  are not used in any organisms. 
B)  do not code for an amino acid. 
C)  code for non-functional amino acids. 
D)  signify 'start here'. 
E)  do more than one of these things. E

Question 4

Which of the following is NOT a homeotic gene?

Accepted Answer

A)  Tinman 
B)  groucho 
C)  Dunce 
D)  Toll 
E)  all of these are homeotic genes 
A)  Tinman 
B)  groucho 
C)  Dunce 
D)  Toll 
E)  all of these are homeotic genes

Question 5

If there were only 2 RNA nucleotides and each codon was 4 letters long, how many amino acids could be coded for?

Accepted Answer

A)  2 
B)  4 
C)  8 
D)  16 
E)  32 
A)  2 
B)  4 
C)  8 
D)  16 
E)  32

Question 6

Examine the figure above and answer the following question(s). In this representation of transcription, strand # 1 represents

Accepted Answer

A)  the coding DNA strand. 
B)  the transcript. 
C)  the template for the coding DNA strand. 
D)  the coded RNA strand. 
E)  both the transcript and the coded RNA strand. 
A)  the coding DNA strand. 
B)  the transcript. 
C)  the template for the coding DNA strand. 
D)  the coded RNA strand. 
E)  both the transcript and the coded RNA strand.

Question 7

In a sickled red blood cell, what do the hemoglobin molecules do?

Accepted Answer

A)  repel each other 
B)  stick together 
C)  fracture and release their contents into the cytoplasm 
D)  create holes in the cell membrane 
E)  more than one of these 
A)  repel each other 
B)  stick together 
C)  fracture and release their contents into the cytoplasm 
D)  create holes in the cell membrane 
E)  more than one of these

Question 8

What is the genetic code?

Accepted Answer

A)  all of our genes collectively 
B)  all of our base-pairs collectively 
C)  the genetic "words" that code for amino acids 
D)  the genes on DNA that code for proteins 
E)  more than one of these describes the genetic code 
A)  all of our genes collectively 
B)  all of our base-pairs collectively 
C)  the genetic "words" that code for amino acids 
D)  the genes on DNA that code for proteins 
E)  more than one of these describes the genetic code

Question 9

Homeotic genes are, in general, in control of

Accepted Answer

A)  X chromosome inactivation. 
B)  formation of major body parts. 
C)  methylation of nucleotides. 
D)  dosage compensation. 
E)  more than one of these. 
A)  X chromosome inactivation. 
B)  formation of major body parts. 
C)  methylation of nucleotides. 
D)  dosage compensation. 
E)  more than one of these.

Question 10

Which of the following is NOT true of homeotic genes?

Accepted Answer

A)  they control the development of body parts 
B)  they are highly conserved genes 
C)  they are specific to specific species 
D)  PAX6 is an example of one 
E)  they have been discovered by knockout experiments 
A)  they control the development of body parts 
B)  they are highly conserved genes 
C)  they are specific to specific species 
D)  PAX6 is an example of one 
E)  they have been discovered by knockout experiments

Question 11

In eukaryotes, most translation takes place in or on the

Accepted Answer

A)  nucleus. 
B)  rough endoplasmic reticulum. 
C)  smooth endoplasmic reticulum. 
D)  cytoplasm. 
E)  Golgi bodies. 
A)  nucleus. 
B)  rough endoplasmic reticulum. 
C)  smooth endoplasmic reticulum. 
D)  cytoplasm. 
E)  Golgi bodies.

Question 12

If an anticodon was AUG, what would the corresponding nucleotides on DNA be?

Accepted Answer

A)  TAC 
B)  ATG 
C)  UAC 
D)  AUG 
E)  CGT 
A)  TAC 
B)  ATG 
C)  UAC 
D)  AUG 
E)  CGT

Question 13

A gene mutation

Accepted Answer

A)  is a change in the nucleotide sequence of DNA. 
B)  may be harmful. 
C)  may arise spontaneously. 
D)  may have no effect. 
E)  is true of all of these. 
A)  is a change in the nucleotide sequence of DNA. 
B)  may be harmful. 
C)  may arise spontaneously. 
D)  may have no effect. 
E)  is true of all of these.

Question 14

Once the amino acid on the second tRNA bonds with the amino acid of the first tRNA, what happens to that first tRNA?

Accepted Answer

A)  it remains attached to the rRNA. 
B)  it moves into the nucleus to get more instructions from mRNA. 
C)  it breaks down into its component nucleotides. 
D)  it leaves the ribosome and may pick up another amino acid. 
E)  it transforms into a mRNA. 
A)  it remains attached to the rRNA. 
B)  it moves into the nucleus to get more instructions from mRNA. 
C)  it breaks down into its component nucleotides. 
D)  it leaves the ribosome and may pick up another amino acid. 
E)  it transforms into a mRNA.

Question 15

Which of the following processes is responsible for the conversion of DNA information into messenger RNA?

Accepted Answer

A)  replication 
B)  transcription 
C)  duplication 
D)  translation 
E)  any of these 
A)  replication 
B)  transcription 
C)  duplication 
D)  translation 
E)  any of these

Question 16

Which nucleotide forms the tail of a completed messenger RNA transcript?

Accepted Answer

A)  adenine 
B)  thymine 
C)  cytosine 
D)  guanine 
E)  a combination of more than one of these 
A)  adenine 
B)  thymine 
C)  cytosine 
D)  guanine 
E)  a combination of more than one of these

Question 17

____ molecules carry amino acids to ribosomes.

Accepted Answer

A)  Template RNA 
B)  Messenger RNA 
C)  Transfer RNA 
D)  Ribosomal RNA 
E)  All of these 
A)  Template RNA 
B)  Messenger RNA 
C)  Transfer RNA 
D)  Ribosomal RNA 
E)  All of these

Question 18

Mutations can be

Accepted Answer

A)  neutral. 
B)  beneficial. 
C)  lethal. 
D)  heritable. 
E)  all of these. 
A)  neutral. 
B)  beneficial. 
C)  lethal. 
D)  heritable. 
E)  all of these.

Question 19

A ribosome contains

Accepted Answer

A)  RNA. 
B)  DNA. 
C)  proteins. 
D)  RNA and proteins. 
E)  RNA, DNA, and proteins. 
A)  RNA. 
B)  DNA. 
C)  proteins. 
D)  RNA and proteins. 
E)  RNA, DNA, and proteins.

Question 20

Which of the following mutations always lead(s) to a shift of the mRNA's reading frame?

Accepted Answer

A)  deletion and insertion 
B)  deletion and substitution 
C)  insertion and substitution 
D)  substitution 
E)  insertion 
A)  deletion and insertion 
B)  deletion and substitution 
C)  insertion and substitution 
D)  substitution 
E)  insertion

Exam 7: Gene Expression and Control

What are the non-coding segments of DNA called?

To which of the following books does DNA compare?

Of all the different codons that exist, three of them

Which of the following is NOT a homeotic gene?

If there were only 2 RNA nucleotides and each codon was 4 letters long, how many amino acids could be coded for?

Examine the figure above and answer the following question(s). In this representation of transcription, strand # 1 represents

In a sickled red blood cell, what do the hemoglobin molecules do?

What is the genetic code?

Homeotic genes are, in general, in control of

Which of the following is NOT true of homeotic genes?

In eukaryotes, most translation takes place in or on the

If an anticodon was AUG, what would the corresponding nucleotides on DNA be?

A gene mutation

Once the amino acid on the second tRNA bonds with the amino acid of the first tRNA, what happens to that first tRNA?

Which of the following processes is responsible for the conversion of DNA information into messenger RNA?

Which nucleotide forms the tail of a completed messenger RNA transcript?

____ molecules carry amino acids to ribosomes.

Mutations can be

A ribosome contains

Which of the following mutations always lead(s) to a shift of the mRNA's reading frame?

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

Dna Structure and Function

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

Filters