Question 1

Which of the RNAs act as an enzyme?

Accepted Answer

A)  mRNA 
B)  rRNA 
C)  tRNA 
D)  mRNA and rRNA 
E)  none of the RNAs act as an enzyme 
A)  mRNA 
B)  rRNA 
C)  tRNA 
D)  mRNA and rRNA 
E)  none of the RNAs act as an enzyme

Question 2

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 3

If the codon consisted of only 2 nucleotides there would be how many possible codons?

Accepted Answer

A)  4 
B)  8 
C)  16 
D)  32 
E)  64 
A)  4 
B)  8 
C)  16 
D)  32 
E)  64

Question 4

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 5

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 6

Four of the five answers listed below are found in RNA molecules.Select the EXCEPTION.

Accepted Answer

A)  adenine 
B)  guanine 
C)  thymine 
D)  uracil 
E)  cytosine 
A)  adenine 
B)  guanine 
C)  thymine 
D)  uracil 
E)  cytosine

Question 7

tRNA is most like

Accepted Answer

A)  a delivery truck 
B)  a garbage truck 
C)  a messenger 
D)  a carpenter 
E)  a physical therapist 
A)  a delivery truck 
B)  a garbage truck 
C)  a messenger 
D)  a carpenter 
E)  a physical therapist

Question 8

In multicellular organisms,specialization in structure and function of cells is caused by

Accepted Answer

A)  inhibition of transcription. 
B)  methylation of nucleotides. 
C)  a differential expression of genes. 
D)  translation without transcription. 
E)  more than one of these. 
A)  inhibition of transcription. 
B)  methylation of nucleotides. 
C)  a differential expression of genes. 
D)  translation without transcription. 
E)  more than one of these.

Question 9

In sickle cell anemia,glutamic acid is substituted for

Accepted Answer

A)  valine 
B)  lysine 
C)  serine 
D)  arginine 
E)  phenylalanine 
A)  valine 
B)  lysine 
C)  serine 
D)  arginine 
E)  phenylalanine

Question 10

In prokaryotes,translation takes place in the

Accepted Answer

A)  cytoplasm. 
B)  nucleus. 
C)  plasma membrane. 
D)  endoplasmic reticulum. 
E)  Golgi bodies. 
A)  cytoplasm. 
B)  nucleus. 
C)  plasma membrane. 
D)  endoplasmic reticulum. 
E)  Golgi bodies.

Question 11

Examine the figure above and answer the following question(s).
-In this representation of transcription,strand # ____ is ____ because it ____.

Accepted Answer

A)  2; RNA; is double-stranded 
B)  3; RNA; contains uracil 
C)  2; RNA; contains thymine 
D)  2; RNA; has no uracil 
E)  3; DNA; contains adenine 
A)  2; RNA; is double-stranded 
B)  3; RNA; contains uracil 
C)  2; RNA; contains thymine 
D)  2; RNA; has no uracil 
E)  3; DNA; contains adenine

Question 12

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 13

What is the advantage of having introns in our genes?

Accepted Answer

A)  multiple proteins can be formed in protein synthesis 
B)  protection from viruses 
C)  they can be modified into new proteins 
D)  protection from thymine dimer formation 
E)  there is no known advantage to having introns in our genes 
A)  multiple proteins can be formed in protein synthesis 
B)  protection from viruses 
C)  they can be modified into new proteins 
D)  protection from thymine dimer formation 
E)  there is no known advantage to having introns in our genes

Question 14

A person with a mutated SRY gene will

Accepted Answer

A)  be an XX female. 
B)  have normal male genitalia. 
C)  be sterile. 
D)  have both male and female genitalia. 
E)  have no genitalia. 
A)  be an XX female. 
B)  have normal male genitalia. 
C)  be sterile. 
D)  have both male and female genitalia. 
E)  have no genitalia.

Question 15

Classification.Answer the questions in reference to the five RNA codons listed below.
 a.AUG
b.CAU
c.UUG
d.UUA
e.AAA
-If DNA nucleotide sequence was CAT,this would be the tRNA anticodon.

Accepted Answer

The answer of Classification.Answer the questions in reference to the...

Question 16

Which RNA is the first to be activated in the process of protein synthesis?

Accepted Answer

A)  mRNA 
B)  tRNA 
C)  rRNA 
D)  dRNA 
E)  sRNA 
A)  mRNA 
B)  tRNA 
C)  rRNA 
D)  dRNA 
E)  sRNA

Question 17

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 18

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 19

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 20

MATCHING
Answer the following questions regarding protein synthesis by matching each term with the most appropriate description.
a.anticodon
b.rRNA
c.codon
d.ribosome
e.genetic code
f.translation termination
g.messenger RNA
h.promoters
i.transcription
j.translation
-guided and catalyzed by RNA polymerases

Accepted Answer

The answer of MATCHING
Answer the following questions regarding protein synthesis...

Exam 7: Gene Expression and Control

Which of the RNAs act as an enzyme?

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

If the codon consisted of only 2 nucleotides there would be how many possible codons?

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

Insertion mutations are often caused by

Four of the five answers listed below are found in RNA molecules.Select the EXCEPTION.

tRNA is most like

In multicellular organisms,specialization in structure and function of cells is caused by

In sickle cell anemia,glutamic acid is substituted for

In prokaryotes,translation takes place in the

Examine the figure above and answer the following question(s). -In this representation of transcription,strand # ____ is ____ because it ____.

Homeotic genes are,in general,in control of

What is the advantage of having introns in our genes?

A person with a mutated SRY gene will

Classification.Answer the questions in reference to the five RNA codons listed below. a.AUG b.CAU c.UUG d.UUA e.AAA -If DNA nucleotide sequence was CAT,this would be the tRNA anticodon.

Which RNA is the first to be activated in the process of protein synthesis?

Mutations can be

Which of the following is NOT a homeotic gene?

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

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

Examine the figure above and answer the following question(s). -In this representation of transcription,strand # is because it .