Question 1

If the DNA coding sequence was CGA - ATC, the mRNA would be

Accepted Answer

A)  GCU - UAG. 
B)  AUC - CGA. 
C)  UAG - GCU. 
D)  UAG - CGU. 
E)  none of these. 
A)  GCU - UAG. 
B)  AUC - CGA. 
C)  UAG - GCU. 
D)  UAG - CGU. 
E)  none of these.

Question 2

Which of the following would NOT be the cause of mutations in DNA sequences?

Accepted Answer

A)  RNA polymerase 
B)  DNA polymerase 
C)  transposable elements 
D)  UV light 
E)  more than one of these 
A)  RNA polymerase 
B)  DNA polymerase 
C)  transposable elements 
D)  UV light 
E)  more than one of these

Question 3

Which of the following is an action of ricin?

Accepted Answer

A)  binding to carbohydrates on the plasma membrane 
B)  removal of an adenine base from rRNA 
C)  ribosome inactivation 
D)  none of these are actions of ricin 
E)  all of these (except d) are actions of ricin 
A)  binding to carbohydrates on the plasma membrane 
B)  removal of an adenine base from rRNA 
C)  ribosome inactivation 
D)  none of these are actions of ricin 
E)  all of these (except d) are actions of ricin

Question 4

What happens to ricin in the plant in which it is found?

Accepted Answer

A)  it is hydrolyzed and the amino acids that result are used to make new proteins 
B)  it is complexed with carbohydrates to make a cell wall component 
C)  it is broken down into monosaccharides that are then used to generate ATP 
D)  it is hydrolyzed into fatty acids which are further hydrolyzed to make steroids 
E)  it is hydrolyzed and the nucleotides that result are used to make DNA and RNA 
A)  it is hydrolyzed and the amino acids that result are used to make new proteins 
B)  it is complexed with carbohydrates to make a cell wall component 
C)  it is broken down into monosaccharides that are then used to generate ATP 
D)  it is hydrolyzed into fatty acids which are further hydrolyzed to make steroids 
E)  it is hydrolyzed and the nucleotides that result are used to make DNA and RNA

Question 5

Selecting the Exception Four of the five answers listed below are steps in translation. Select the EXCEPTION.

Accepted Answer

A)  initiation 
B)  replication 
C)  chain elongation 
D)  termination 
E)  peptide bond formation 
A)  initiation 
B)  replication 
C)  chain elongation 
D)  termination 
E)  peptide bond formation

Question 6

Which of the following is NOT a characteristic of RNA?

Accepted Answer

A)  single stranded 
B)  ribose sugar 
C)  nucleic acid 
D)  bases are A, T, C, G 
E)  phosphates attached to sugars 
A)  single stranded 
B)  ribose sugar 
C)  nucleic acid 
D)  bases are A, T, C, G 
E)  phosphates attached to sugars

Question 7

Which of the following adds RNA nucleotides, one at a time, during transcription?

Accepted Answer

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

Question 8

Which of the following NOT a protection from most mutations?

Accepted Answer

A)  very few bases actually change 
B)  the genetic code is redundant 
C)  most of our DNA is non-coding 
D)  genes contain non-coding regions 
E)  all of these protect us from mutations 
A)  very few bases actually change 
B)  the genetic code is redundant 
C)  most of our DNA is non-coding 
D)  genes contain non-coding regions 
E)  all of these protect us from mutations

Question 9

In most species, all mRNA transcripts begin with

Accepted Answer

A)  methionine. 
B)  a ribosome. 
C)  AUG. 
D)  the P site. 
E)  an anticodon. 
A)  methionine. 
B)  a ribosome. 
C)  AUG. 
D)  the P site. 
E)  an anticodon.

Question 10

If an mRNA carries CUCGAU as a sequence, what would be the complementary sequence on the DNA?

Accepted Answer

A)  CTCGAT 
B)  GUGCUA 
C)  GTGCAT 
D)  GAGCTA 
E)  ACATGC 
A)  CTCGAT 
B)  GUGCUA 
C)  GTGCAT 
D)  GAGCTA 
E)  ACATGC

Question 11

Insertion mutations are often caused by

Accepted Answer

A)  base-pair substitutions. 
B)  frameshift mutations. 
C)  transposable elements. 
D)  gene duplications. 
E)  deletions. 
A)  base-pair substitutions. 
B)  frameshift mutations. 
C)  transposable elements. 
D)  gene duplications. 
E)  deletions.

Question 12

Examine the figure above and answer the following question(s). In this representation of transcription, the first genetic word of RNA is

Accepted Answer

A)  ATG. 
B)  ATA. 
C)  UAU. 
D)  GUG. 
E)  AUG. 
A)  ATG. 
B)  ATA. 
C)  UAU. 
D)  GUG. 
E)  AUG.

Question 13

rRNA differs from other types of RNA in what way or ways?

Accepted Answer

A)  it acts as an enzyme. 
B)  it carries amino acids. 
C)  it is complexed with a protein. 
D)  it carries the complete instructions for making a protein. 
E)  it is different in more than one of these ways. 
A)  it acts as an enzyme. 
B)  it carries amino acids. 
C)  it is complexed with a protein. 
D)  it carries the complete instructions for making a protein. 
E)  it is different in more than one of these ways.

Question 14

In transcription,

Accepted Answer

A)  several proteins can made from the same DNA molecule. 
B)  promoters are at the beginning of a gene. 
C)  messenger RNA is produced. 
D)  a specific enzyme called RNA polymerase is required. 
E)  all of these are true. 
A)  several proteins can made from the same DNA molecule. 
B)  promoters are at the beginning of a gene. 
C)  messenger RNA is produced. 
D)  a specific enzyme called RNA polymerase is required. 
E)  all of these are true.

Question 15

The tightly condensed non-functional X chromosome is called a(an)

Accepted Answer

A)  Barr body. 
B)  Y chromosome. 
C)  autosome. 
D)  X linked chromosome. 
E)  Watson segment. 
A)  Barr body. 
B)  Y chromosome. 
C)  autosome. 
D)  X linked chromosome. 
E)  Watson segment.

Question 16

DNA molecules contain protein coding sequences called

Accepted Answer

A)  genotypes. 
B)  genomes. 
C)  nucleotides. 
D)  genes. 
E)  ribonucleic acids. 
A)  genotypes. 
B)  genomes. 
C)  nucleotides. 
D)  genes. 
E)  ribonucleic acids.

Question 17

To what, specifically, does oxygen in a hemoglobin molecule bind?

Accepted Answer

A)  another oxygen 
B)  hydrogen 
C)  iron 
D)  methionine 
E)  nitrogen 
A)  another oxygen 
B)  hydrogen 
C)  iron 
D)  methionine 
E)  nitrogen

Question 18

Ricin is internationally considered as a weapon. Its use is now banned in most countries according to the ____.

Accepted Answer

A)  Madrid protocol. 
B)  Paris protocol. 
C)  Kyoto protocol. 
D)  Geneva protocol. 
E)  Vienna protocol. 
A)  Madrid protocol. 
B)  Paris protocol. 
C)  Kyoto protocol. 
D)  Geneva protocol. 
E)  Vienna protocol.

Question 19

Which of the following processes is (are) part of gene expression?
I. Transduction
II. transcription
III. translation

Accepted Answer

A)  I and II 
B)  I and III 
C)  II and III 
D)  I, II, and III 
E)  III only 
A)  I and II 
B)  I and III 
C)  II and III 
D)  I, II, and III 
E)  III only

Question 20

During transcription,

Accepted Answer

A)  non-coding sequences are removed from the RNA transcript. 
B)  regulatory proteins attach to the DNA at the promotor site. 
C)  DNA polymerase assembles RNA nucleotides. 
D)  the entire DNA strand opens up for complete gene transcription. 
E)  tRNA brings nucleotides to the DNA strand. 
A)  non-coding sequences are removed from the RNA transcript. 
B)  regulatory proteins attach to the DNA at the promotor site. 
C)  DNA polymerase assembles RNA nucleotides. 
D)  the entire DNA strand opens up for complete gene transcription. 
E)  tRNA brings nucleotides to the DNA strand.

Exam 7: Gene Expression and Control

If the DNA coding sequence was CGA - ATC, the mRNA would be

Which of the following would NOT be the cause of mutations in DNA sequences?

Which of the following is an action of ricin?

What happens to ricin in the plant in which it is found?

Selecting the Exception Four of the five answers listed below are steps in translation. Select the EXCEPTION.

Which of the following is NOT a characteristic of RNA?

Which of the following adds RNA nucleotides, one at a time, during transcription?

Which of the following NOT a protection from most mutations?

In most species, all mRNA transcripts begin with

If an mRNA carries CUCGAU as a sequence, what would be the complementary sequence on the DNA?

Insertion mutations are often caused by

Examine the figure above and answer the following question(s). In this representation of transcription, the first genetic word of RNA is

rRNA differs from other types of RNA in what way or ways?

In transcription,

The tightly condensed non-functional X chromosome is called a(an)

DNA molecules contain protein coding sequences called

To what, specifically, does oxygen in a hemoglobin molecule bind?

Ricin is internationally considered as a weapon. Its use is now banned in most countries according to the ____.

Which of the following processes is (are) part of gene expression? I. Transduction II. transcription III. translation

During transcription,

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

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