Question 1

When is cell-to-cell communication particularly important in regulating gene expression?

Accepted Answer

A) During mitosis 
B) During meiosis 
C) During embryonic development 
D) During replication 
A) During mitosis 
B) During meiosis 
C) During embryonic development 
D) During replication

Question 2

The signal transduction pathway allows ________.

Accepted Answer

A) one cell to regulate the gene expression of another cell 
B) a cell to repair damage to its DNA 
C) genes from one organism to be inserted into the nucleus of another organism's cells 
D) whole genomes to be sequenced 
A) one cell to regulate the gene expression of another cell 
B) a cell to repair damage to its DNA 
C) genes from one organism to be inserted into the nucleus of another organism's cells 
D) whole genomes to be sequenced

Question 3

What is the main cause of cancer?

Accepted Answer

A) DNA replication no longer working properly 
B) Exposure to carcinogens in the environment 
C) Old age, during which the cells of the body no longer work properly 
D) We do not currently know the main cause of cancer. 
A) DNA replication no longer working properly 
B) Exposure to carcinogens in the environment 
C) Old age, during which the cells of the body no longer work properly 
D) We do not currently know the main cause of cancer.

Question 4

What is a gene?

Accepted Answer

A) A discrete sequence of DNA nucleotides 
B) A section of DNA that codes for one or more proteins 
C) A section of DNA that codes for a portion of a protein 
D) All of these and more are part of the expanding definition of a gene. 
A) A discrete sequence of DNA nucleotides 
B) A section of DNA that codes for one or more proteins 
C) A section of DNA that codes for a portion of a protein 
D) All of these and more are part of the expanding definition of a gene.

Question 5

The type of mutation that alters the nucleotide sequence of a gene but does not alter the amino acid sequence of the protein produced from that gene is called ________ mutation.

Accepted Answer

A) missense 
B) silent 
C) nonsense 
D) frameshift 
A) missense 
B) silent 
C) nonsense 
D) frameshift

Question 6

Do all cells of the body express the same genes?

Accepted Answer

A) Yes, since they all contain the same DNA 
B) Yes, since they all make the same proteins 
C) No, since they don't contain the same DNA 
D) No, since they don't all need to make the same proteins 
A) Yes, since they all contain the same DNA 
B) Yes, since they all make the same proteins 
C) No, since they don't contain the same DNA 
D) No, since they don't all need to make the same proteins

Question 7

How would the cDNA created in a lab compare to the original DNA?

Accepted Answer

A) It would contain only the genes that were producing proteins in the cell at the time the cDNA was created. 
B) It would be identical to the original DNA. 
C) It would be a single strand instead of the original double-stranded DNA. 
D) It would be circular, similar to bacterial DNA. 
A) It would contain only the genes that were producing proteins in the cell at the time the cDNA was created. 
B) It would be identical to the original DNA. 
C) It would be a single strand instead of the original double-stranded DNA. 
D) It would be circular, similar to bacterial DNA.

Question 8

What is the main function of DNA helicase in DNA replication?

Accepted Answer

A) Unzipping the DNA double helix 
B) Adding complementary DNA bases to the newly forming DNA strand 
C) Proofreading the DNA molecule 
D) Fusing DNA fragments together 
A) Unzipping the DNA double helix 
B) Adding complementary DNA bases to the newly forming DNA strand 
C) Proofreading the DNA molecule 
D) Fusing DNA fragments together

Question 9

Which of the following statement is not correct about DNA replication?

Accepted Answer

A) It happens in the nucleus 
B) It is semi-conservative 
C) Only genes are replicated in DNA replication 
D) It involves DNA polymerase 
A) It happens in the nucleus 
B) It is semi-conservative 
C) Only genes are replicated in DNA replication 
D) It involves DNA polymerase

Question 10

What is the type of bond between two strands of DNA?

Accepted Answer

A) A peptide bond 
B) A hydrogen bond 
C) A ionic bond 
D) A covalent bond 
A) A peptide bond 
B) A hydrogen bond 
C) A ionic bond 
D) A covalent bond

Question 11

The PCR technique doubles the amount of DNA in a sample in each cycle.If you started the PCR technique with two fragments of double-stranded DNA, calculate how many double-stranded DNA fragments you would you have after four cycles.

Accepted Answer

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

Question 12

What is the name of the enzyme that builds cDNA out of mRNA?

Accepted Answer

A) DNA polymerase 
B) RNA polymerase 
C) Reverse transcriptase 
D) DNA helicase 
A) DNA polymerase 
B) RNA polymerase 
C) Reverse transcriptase 
D) DNA helicase

Question 13

Are there ways to prevent cancer?

Accepted Answer

A) No, cancer cannot be prevented; it can only be treated. 
B) No, cancer cannot be prevented or treated. 
C) Yes, there are many ways cancer can be prevented, including through a healthy diet and exercise. 
D) Yes, cancer can be prevented, but only with intense exercise. 
A) No, cancer cannot be prevented; it can only be treated. 
B) No, cancer cannot be prevented or treated. 
C) Yes, there are many ways cancer can be prevented, including through a healthy diet and exercise. 
D) Yes, cancer can be prevented, but only with intense exercise.

Question 14

The genetic code is ________.

Accepted Answer

A) our DNA, in other words what makes us who we are 
B) our genome 
C) the complementary base-pairing of A going with T and C going with G 
D) what allows codons to be translated into amino acids 
A) our DNA, in other words what makes us who we are 
B) our genome 
C) the complementary base-pairing of A going with T and C going with G 
D) what allows codons to be translated into amino acids

Question 15

What is the correct pathway of information to go from a gene to a protein in a eukaryotic cell?

Accepted Answer

Information located on DNA, and specific

Question 16

Which of the following statements is incorrect regarding DNA and RNA?

Accepted Answer

A) They each contain a slightly different sugar molecule. 
B) DNA is double stranded, and RNA is a single strand. 
C) One of the bases is different. 
D) All of the above are correct. 
A) They each contain a slightly different sugar molecule. 
B) DNA is double stranded, and RNA is a single strand. 
C) One of the bases is different. 
D) All of the above are correct.

Question 17

DNA replication is a semi-conservative process.This means that after replication, ________.

Accepted Answer

A) each new DNA double helix consists of two old strands 
B) each new DNA double helix consists of one old strand and one new strand 
C) each new DNA double helix contains 25% of the old DNA double helix 
D) each new DNA double helix consists of two new strands 
A) each new DNA double helix consists of two old strands 
B) each new DNA double helix consists of one old strand and one new strand 
C) each new DNA double helix contains 25% of the old DNA double helix 
D) each new DNA double helix consists of two new strands

Question 18

Three of the following statements are correct.Identify the statement that is not correct regarding genetically modified organisms.

Accepted Answer

A) There are no risks associated with GM crops. 
B) GM crops have been produced with increased nutrition. 
C) GM crops have been produced that are disease resistant. 
D) GM animals are not in our food supply. 
A) There are no risks associated with GM crops. 
B) GM crops have been produced with increased nutrition. 
C) GM crops have been produced that are disease resistant. 
D) GM animals are not in our food supply.

Question 19

The base that is not found in DNA, but only in RNA is ________.

Accepted Answer

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

Question 20

Can one gene make different proteins?

Accepted Answer

A) Yes, by splicing the resulting mRNA differently (i.e., removing different exons) 
B) Yes, by modifying the original DNA 
C) No, because one gene codes only for a single protein 
D) No, because genes do not make proteins 
A) Yes, by splicing the resulting mRNA differently (i.e., removing different exons) 
B) Yes, by modifying the original DNA 
C) No, because one gene codes only for a single protein 
D) No, because genes do not make proteins

When is cell-to-cell communication particularly important in regulating gene expression?

The signal transduction pathway allows ________.

What is the main cause of cancer?

What is a gene?

The type of mutation that alters the nucleotide sequence of a gene but does not alter the amino acid sequence of the protein produced from that gene is called ________ mutation.

Do all cells of the body express the same genes?

How would the cDNA created in a lab compare to the original DNA?

What is the main function of DNA helicase in DNA replication?

Which of the following statement is not correct about DNA replication?

What is the type of bond between two strands of DNA?

The PCR technique doubles the amount of DNA in a sample in each cycle.If you started the PCR technique with two fragments of double-stranded DNA, calculate how many double-stranded DNA fragments you would you have after four cycles.

What is the name of the enzyme that builds cDNA out of mRNA?

Are there ways to prevent cancer?

The genetic code is ________.

What is the correct pathway of information to go from a gene to a protein in a eukaryotic cell?

Which of the following statements is incorrect regarding DNA and RNA?

DNA replication is a semi-conservative process.This means that after replication, ________.

Three of the following statements are correct.Identify the statement that is not correct regarding genetically modified organisms.

The base that is not found in DNA, but only in RNA is ________.

Can one gene make different proteins?

An Introduction to the Science of Life

The Chemistry of Life

The Cell: The Fundamental Unit of Life

Energy and Life

Chromosomes and Inheritance

Darwinian Evolution

Biodiversity 1: Microscopic Organisms

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Biology The Core: Appendix

Filters

Exam 6: DNA: The Molecule of Life

When is cell-to-cell communication particularly important in regulating gene expression?

The signal transduction pathway allows ________.

What is the main cause of cancer?

What is a gene?

The type of mutation that alters the nucleotide sequence of a gene but does not alter the amino acid sequence of the protein produced from that gene is called ________ mutation.

Do all cells of the body express the same genes?

How would the cDNA created in a lab compare to the original DNA?

What is the main function of DNA helicase in DNA replication?

Which of the following statement is not correct about DNA replication?

What is the type of bond between two strands of DNA?

The PCR technique doubles the amount of DNA in a sample in each cycle.If you started the PCR technique with two fragments of double-stranded DNA, calculate how many double-stranded DNA fragments you would you have after four cycles.

What is the name of the enzyme that builds cDNA out of mRNA?

Are there ways to prevent cancer?

The genetic code is ________.

What is the correct pathway of information to go from a gene to a protein in a eukaryotic cell?

Which of the following statements is incorrect regarding DNA and RNA?

DNA replication is a semi-conservative process.This means that after replication, ________.

Three of the following statements are correct.Identify the statement that is not correct regarding genetically modified organisms.

The base that is not found in DNA, but only in RNA is ________.

Can one gene make different proteins?

An Introduction to the Science of Life

The Chemistry of Life

The Cell: The Fundamental Unit of Life

Energy and Life

Chromosomes and Inheritance

Darwinian Evolution

Biodiversity 1: Microscopic Organisms

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Biology The Core: Appendix

Filters