Question 1

How can a single gene code for more than one protein?

Accepted Answer

A) Different RNA polymerases transcribe it and produce different proteins. 
B) Different types of ribosomes translate the resulting mRNA, producing different proteins. 
C) Different introns can be removed to produce different proteins. 
D) The exons within a mRNA can be spliced together in different ways. 
A) Different RNA polymerases transcribe it and produce different proteins. 
B) Different types of ribosomes translate the resulting mRNA, producing different proteins. 
C) Different introns can be removed to produce different proteins. 
D) The exons within a mRNA can be spliced together in different ways.

Question 2

Which of the following elongates RNA molecules in the nucleus?

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

tRNA is necessary for transcription to occur. True or False?

Accepted Answer

A) True 
 B)False

Question 4

Which of the following has the fewest nucleotides in its strand?

Accepted Answer

A) mRNA having 75 nucleotides. 
B) mRNA having 50 codons. 
C) protein having 40 amino acids. 
D) protein with 2 polypeptides, each having 35 amino acids. 
E) mRNA having 100 bases. 
A) mRNA having 75 nucleotides. 
B) mRNA having 50 codons. 
C) protein having 40 amino acids. 
D) protein with 2 polypeptides, each having 35 amino acids. 
E) mRNA having 100 bases.

Question 5

Which of the following molecules functions to transfer genetic information from one generation to the next?

Accepted Answer

A) DNA 
B) mRNA 
C) tRNA 
D) proteins 
E) lipids 
A) DNA 
B) mRNA 
C) tRNA 
D) proteins 
E) lipids

Question 6

Suppose the template DNA strand of a "mini-gene" has the base sequence TACCCGGATTCA. The anticodon of the tRNA that carries the first amino acid to the ribosome will be:

Accepted Answer

A) AUG. 
B) UAC. 
C) UCA. 
D) AGU. 
A) AUG. 
B) UAC. 
C) UCA. 
D) AGU.

Question 7

Give the sequence of bases in transcribed mRNA from the original DNA base sequence TAGGCTAA.

Accepted Answer

The answer of Give the sequence of bases in transcribed...

Question 8

Which of the following is noted when comparing DNA and RNA?

Accepted Answer

A) No sugar is present in either molecule. 
B) Hydrogen bonding is important only in DNA. 
C) Only DNA has a backbone made up of sugars and phosphates. 
D) Adenine pairs with different bases in DNA and RNA. 
E) Thymine pairs with different bases in DNA and RNA. 
A) No sugar is present in either molecule. 
B) Hydrogen bonding is important only in DNA. 
C) Only DNA has a backbone made up of sugars and phosphates. 
D) Adenine pairs with different bases in DNA and RNA. 
E) Thymine pairs with different bases in DNA and RNA.

Question 9

In eukaryotic cells, ________ occurs in the nucleus, resulting in the production of mRNA, which then travels to the cytoplasm for protein synthesis via ________.

Accepted Answer

transcript

Question 10

What is the reason calico cats are almost always female?

Accepted Answer

A) inactivation of the X chromosome 
B) lack of a Y chromosome in females 
C) activation of the calico gene by the female sex hormone estrogen 
D) inactivation of the calico gene in males by the sex hormone testosterone 
E) a mutation on the X chromosome 
A) inactivation of the X chromosome 
B) lack of a Y chromosome in females 
C) activation of the calico gene by the female sex hormone estrogen 
D) inactivation of the calico gene in males by the sex hormone testosterone 
E) a mutation on the X chromosome

Question 11

Steroid hormones have the ability to regulate transcription. True or False?

Accepted Answer

A) True 
 B)False

Question 12

Compare and contrast the three major RNA molecules involved in translation.

Accepted Answer

mRNA, tRNA, and rRNA are all single-stra

Question 13

The genetic material of some viruses, such as HIV, is not normal DNA but is instead:

Accepted Answer

A) RNA. 
B) protein. 
C) carbohydrate. 
D) lipid. 
E) single-stranded DNA. 
A) RNA. 
B) protein. 
C) carbohydrate. 
D) lipid. 
E) single-stranded DNA.

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

Question 15

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) the deletion of three bases near the start of the coding sequence 
E) a base insertion near the end 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) the deletion of three bases near the start of the coding sequence 
E) a base insertion near the end of the coding sequence

Question 16

What is the anticodon for AUC?

Accepted Answer

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

Question 17

All of the following are directly involved in translation EXCEPT:

Accepted Answer

A) ribosomes. 
B) tRNA. 
C) amino acids. 
D) DNA. 
E) mRNA. 
A) ribosomes. 
B) tRNA. 
C) amino acids. 
D) DNA. 
E) mRNA.

Question 18

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 19

The Barr body is the X chromosome in the cell that is expressed, while the other X chromosome is inactivated. True or False?

Accepted Answer

A) True 
 B)False

Question 20

Transfer RNA is:

Accepted Answer

A) a nucleic acid that, by itself, codes for the primary structure of a protein. 
B) made directly from DNA during transcription. 
C) permanently incorporated into the structure of ribosomes. 
D) larger if the protein to be made has a longer amino acid sequence. 
A) a nucleic acid that, by itself, codes for the primary structure of a protein. 
B) made directly from DNA during transcription. 
C) permanently incorporated into the structure of ribosomes. 
D) larger if the protein to be made has a longer amino acid sequence.

Exam 12: Gene Expression and Regulation

How can a single gene code for more than one protein?

Which of the following elongates RNA molecules in the nucleus?

tRNA is necessary for transcription to occur. True or False?

Which of the following has the fewest nucleotides in its strand?

Which of the following molecules functions to transfer genetic information from one generation to the next?

Suppose the template DNA strand of a "mini-gene" has the base sequence TACCCGGATTCA. The anticodon of the tRNA that carries the first amino acid to the ribosome will be:

Give the sequence of bases in transcribed mRNA from the original DNA base sequence TAGGCTAA.

Which of the following is noted when comparing DNA and RNA?

In eukaryotic cells, ________ occurs in the nucleus, resulting in the production of mRNA, which then travels to the cytoplasm for protein synthesis via ________.

What is the reason calico cats are almost always female?

Steroid hormones have the ability to regulate transcription. True or False?

Compare and contrast the three major RNA molecules involved in translation.

The genetic material of some viruses, such as HIV, is not normal DNA but is instead:

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

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

What is the anticodon for AUC?

All of the following are directly involved in translation EXCEPT:

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

The Barr body is the X chromosome in the cell that is expressed, while the other X chromosome is inactivated. True or False?

Transfer RNA is:

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

Filters

In eukaryotic cells, occurs in the nucleus, resulting in the production of mRNA, which then travels to the cytoplasm for protein synthesis via .