Question 1

In eukaryotic cells, occurs in the nucleus, resulting in the production of mRNA, which then travels to the ribosome for into an amino acid chain.

Accepted Answer

transcript

Question 2

Which point mutation would be most likely to have a catastrophic effect?

Accepted Answer

A)  A base substitution 
B)  A base deletion near the start of the coding sequence 
C)  A base deletion near the end of the coding sequence 
D)  A base insertion near the end of the coding sequence 
E)  The deletion of three bases near the start of the coding sequence 
A)  A base substitution 
B)  A base deletion near the start of the coding sequence 
C)  A base deletion near the end of the coding sequence 
D)  A base insertion near the end of the coding sequence 
E)  The deletion of three bases near the start of the coding sequence

Question 3

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

Question 4

Imagine that the short DNA base sequence GGCTGC is transcribed and then translated by a ribosome. The follo activated tRNA molecules are available in the cytoplasm:   What resulting dipeptide will form?

Accepted Answer

A)  Alanine- alanine 
B)  Threonine- glycine 
C)  Cysteine- alanine 
D)  Proline- threonine 
E)  Glycine- cysteine 
A)  Alanine- alanine 
B)  Threonine- glycine 
C)  Cysteine- alanine 
D)  Proline- threonine 
E)  Glycine- cysteine

Question 5

Suppose one strand of a "mini- gene" has the base sequence TACCCGGATTCA. The last codon in the mRNA sequence will be

Accepted Answer

A)  AGU. 
B)  UGA. 
C)  TCA. 
D)  AGT. 
A)  AGU. 
B)  UGA. 
C)  TCA. 
D)  AGT.

Question 6

If a tRNA molecule that is specialized for the transfer of the amino acid valine has the anticodon CAG, it will couple with the codon

Accepted Answer

A)  GTC. 
B)  TUG. 
C)  CAG. 
D)  GAC. 
E)  GUC. 
A)  GTC. 
B)  TUG. 
C)  CAG. 
D)  GAC. 
E)  GUC.

Question 7

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

Accepted Answer

A)  Adenine 
B)  Thymine 
C)  Uracil 
D)  Deoxyribose 
E)  Phosphate groups 
A)  Adenine 
B)  Thymine 
C)  Uracil 
D)  Deoxyribose 
E)  Phosphate groups

Question 8

What is the anticodon for AUC?

Accepted Answer

A)  AUC 
B)  TAG 
C)  CUA 
D)  UAG 
E)  GAU 
A)  AUC 
B)  TAG 
C)  CUA 
D)  UAG 
E)  GAU

Question 9

The sequence of nitrogen- containing bases on one strand of DNA could determine all of the following EXCEPT the sequence of

Accepted Answer

A)  amino acids in a protein molecule. 
B)  ribose and phosphate molecules in tRNA. 
C)  nitrogen- containing bases in mRNA. 
D)  nitrogen- containing bases in the other DNA strand. 
A)  amino acids in a protein molecule. 
B)  ribose and phosphate molecules in tRNA. 
C)  nitrogen- containing bases in mRNA. 
D)  nitrogen- containing bases in the other DNA strand.

Question 10

Steroid hormones have the ability to regulate transcription.

Accepted Answer

A) True 
 B)False

Question 11

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

Accepted Answer

RNA is normally single- strand

Question 12

What is an anticodon?

Accepted Answer

A)  Three consecutive amino acids in a protein 
B)  Three consecutive bases in mRNA 
C)  Three consecutive bases in tRNA 
D)  The beginning of a DNA molecule 
E)  Four consecutive bases in tRNA 
A)  Three consecutive amino acids in a protein 
B)  Three consecutive bases in mRNA 
C)  Three consecutive bases in tRNA 
D)  The beginning of a DNA molecule 
E)  Four consecutive bases in tRNA

Question 13

What is the site of protein synthesis in the cell?

Accepted Answer

A)  Ribosome 
B)  Nucleus 
C)  Nucleolus 
D)  Smooth endoplasmic reticulum 
E)  Eukaryotic chromosome 
A)  Ribosome 
B)  Nucleus 
C)  Nucleolus 
D)  Smooth endoplasmic reticulum 
E)  Eukaryotic chromosome

Question 14

A tRNA that carries a specific amino acid enters the protein- synthesizing machinery at the ribosomes and pairs with the appropriate

Accepted Answer

A)  anticodon. 
B)  amino acid. 
C)  charge. 
D)  codon. 
A)  anticodon. 
B)  amino acid. 
C)  charge. 
D)  codon.

Question 15

The anticodon for the codon AUC is .

Accepted Answer

The answer of The anticodon for the codon AUC is...

Question 16

In females, an entire X chromosome is inactivated in each cell. The inactivated X chromosome is called the
.

Accepted Answer

The answer of In females, an entire X chromosome is...

Question 17

A "mini- gene" has the base sequence TACCCGTGCACG. If the T at the beginning of the sequence is deleted, what will be the consequence?

Accepted Answer

A)  The first nucleotide is always replaced anyway, so there will be no change. 
B)  RNA polymerase will correct the deletion, and a normal protein will be produced. 
C)  All of the codons after that point will be changed. 
D)  Only the amino acid coded for in that codon will be changed. 
E)  RNA polymerase will skip that codon, but all the others will be read normally. 
A)  The first nucleotide is always replaced anyway, so there will be no change. 
B)  RNA polymerase will correct the deletion, and a normal protein will be produced. 
C)  All of the codons after that point will be changed. 
D)  Only the amino acid coded for in that codon will be changed. 
E)  RNA polymerase will skip that codon, but all the others will be read normally.

Question 18

In a wild- type strain of fruit flies, the length of a gene from the start to the stop codon is 2,000 DNA bases. Suppose an experiment indicated that the mRNA molecule transcribed from this gene is much shorter (only 1,200 bases). What is the most likely explanation for this?

Accepted Answer

A)  The first 800 bases of DNA are always cut out as it is transcribed into mRNA. 
B)  The mRNA was prematurely degraded. 
C)  There are introns in the DNA that were cut out of the mRNA. 
D)  A mutation caused the formation of an extra stop codon in the gene. 
A)  The first 800 bases of DNA are always cut out as it is transcribed into mRNA. 
B)  The mRNA was prematurely degraded. 
C)  There are introns in the DNA that were cut out of the mRNA. 
D)  A mutation caused the formation of an extra stop codon in the gene.

Question 19

Transcription is the process of

Accepted Answer

A)  synthesizing an RNA molecule using a DNA template. 
B)  synthesizing a protein using information from mRNA. 
C)  synthesizing a DNA molecule from an RNA template. 
D)  replicating a single- stranded DNA molecule. 
E)  assembling an RNA molecule without a template. 
A)  synthesizing an RNA molecule using a DNA template. 
B)  synthesizing a protein using information from mRNA. 
C)  synthesizing a DNA molecule from an RNA template. 
D)  replicating a single- stranded DNA molecule. 
E)  assembling an RNA molecule without a template.

Question 20

The sequence of nitrogen- containing bases on one strand of DNA most directly determines the sequence of

Accepted Answer

A)  sugars in a polysaccharide molecule. 
B)  amino acids in a protein molecule. 
C)  fatty acids in a fat molecule. 
D)  bases in a protein molecule. 
A)  sugars in a polysaccharide molecule. 
B)  amino acids in a protein molecule. 
C)  fatty acids in a fat molecule. 
D)  bases in a protein molecule.

Exam 13: Gene Expression and Regulation

In eukaryotic cells, occurs in the nucleus, resulting in the production of mRNA, which then travels to the ribosome for into an amino acid chain.

Which point mutation would be most likely to have a catastrophic effect?

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?

Imagine that the short DNA base sequence GGCTGC is transcribed and then translated by a ribosome. The follo activated tRNA molecules are available in the cytoplasm: What resulting dipeptide will form?

Suppose one strand of a "mini- gene" has the base sequence TACCCGGATTCA. The last codon in the mRNA sequence will be

If a tRNA molecule that is specialized for the transfer of the amino acid valine has the anticodon CAG, it will couple with the codon

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

What is the anticodon for AUC?

The sequence of nitrogen- containing bases on one strand of DNA could determine all of the following EXCEPT the sequence of

Steroid hormones have the ability to regulate transcription.

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

What is an anticodon?

What is the site of protein synthesis in the cell?

A tRNA that carries a specific amino acid enters the protein- synthesizing machinery at the ribosomes and pairs with the appropriate

The anticodon for the codon AUC is .

In females, an entire X chromosome is inactivated in each cell. The inactivated X chromosome is called the .

A "mini- gene" has the base sequence TACCCGTGCACG. If the T at the beginning of the sequence is deleted, what will be the consequence?

In a wild- type strain of fruit flies, the length of a gene from the start to the stop codon is 2,000 DNA bases. Suppose an experiment indicated that the mRNA molecule transcribed from this gene is much shorter (only 1,200 bases). What is the most likely explanation for this?

Transcription is the process of

The sequence of nitrogen- containing bases on one strand of DNA most directly determines the sequence of

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

Cellular Reproduction

Meiosis: the Basis of Sexual 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 Amid 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

Energy Flow and Nutrient Cycling in Ecosystems

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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