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

Adding complementary DNA bases to the newly forming DNA strand

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

each new DNA double helix consists of one old strand and one new strand

each new DNA double helix consists of two old strands

each new DNA double helix contains 25% of the old DNA double helix

each new DNA double helix consists of two new strands

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

Only genes are replicated in DNA replication

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

They each contain a slightly different sugar molecule.

DNA is double stranded, and RNA is a single strand.

How is DNA linked to the production of proteins?

DNA holds the instructions for the cells on how to make proteins.

Proteins hold the instructions on how to make DNA.

DNA is the end point of protein production that allows cells to finish making proteins.

DNA is not linked to the production of proteins.

Why does transcription occur in the nucleus and not in the cytoplasm in eukaryotes?

RNA cannot exist in the cytoplasm.

Ribosomes cannot leave the nucleus.

Codons are only found in the nucleus.

three nucleotides of RNA that code for an amino acid

three nucleotides of DNA that code for an amino acid

the section of DNA that codes for a protein

the section of RNA that codes for a protein

are located inside the nucleus in eukaryotic cells

are involved in making ATP for eukaryotic cells

What part of a chromosome goes through transcription and translation?

Only genes go through transcription and translation.

Only introns go through transcription and translation.

Both introns and exons go through transcription and translation.

All of the chromosome goes through transcription and translation.

All of these and more are part of the expanding definition of a gene.

A discrete sequence of DNA nucleotides

A section of DNA that codes for one or more proteins

A section of DNA that codes for a portion of a protein

What is a terminator?

A promoter is a region of DNA that marks the end of a gene.

A promoter is a region of mRNA that is sliced out.

A promoter is a region of DNA that marks the beginning of a gene.

A promoter is a region of mRNA where RNA polymerase binds.

Which of the following statements is correct regarding promoters?

Promoters are regions of DNA that indicates the start of a gene

Promoters are regions of DNA where RNA polymerase can bind to start transcription

Promoters act as a "start here" signal to help control gene expression

Where does translation occur in eukaryotes?

Both in the nucleus and in the cytoplasm

In neither the nucleus nor the cytoplasm

How is translation initiated?

Two ribosomal subunits bind to the mRNA transcript.

DNA helicase binds to the origins of replication.

RNA polymerase binds to the promoter sequence.

Two ribosomal subunits bind to the DNA sequence.

The genetic code is .

our DNA, in other words what makes us who we are

the complementary base-pairing of A going with T and C going with G

what allows codons to be translated into amino acids

What is the correct sequence of events during translation?

Initiation, elongation, termination

Elongation, initiation, termination

Termination, elongation, initiation

Initiation, elongation, initiation

Do all cells of the body express the same genes?

No, since they don't all need to make the same proteins

Yes, since they all contain the same DNA

Yes, since they all make the same proteins

No, since they don't contain the same DNA

Can one gene make different proteins?

Yes, by splicing the resulting mRNA differently (i.e., removing different exons)

Yes, by modifying the original DNA

No, because one gene codes only for a single protein

No, because genes do not make proteins

What does it mean when we say a gene is "turned off"?

The gene cannot be transcribed and translated into a protein.

The gene is no longer working properly.

What is gene regulation?

Mechanisms that turn on and off specific genes to change which proteins are made

Mechanisms that regulate the replication of DNA

Mechanisms that regulate which genes get copied

Mechanisms that turn on and off mitosis in the cell cycle

In what way(s) can mRNAs be processed?

All of the above are ways in which mRNAs can be processed

By adding caps and tails to the ends of the mRNAs

By removing the introns (the noncoding regions) of the mRNAs

By splicing the exons (the coding regions) of the mRNAs in different ways

The signal transduction pathway allows ________.

one cell to regulate the gene expression of another cell

a cell to repair damage to its DNA

genes from one organism to be inserted into the nucleus of another organism's cells

What are carcinogens?

Physical or chemical factors that can lead to mutations causing cancer

The only source of mutations in cells

Chemical factors that can treat cancer

How does a cell typically know when to divide?

Proto-oncogenes code for growth factor proteins that initiate cell division.

Cells have an internal clock and divide only when they reach a certain age.

Tumor suppressor genes code for growth factor proteins that initiate cell division.

Oncogenes code for growth factor proteins that initiate cell division.

cells with proto-oncogene activated

what happens when cells get old

Oncogenes are mutated proto-oncogenes.

Oncogenes are necessary genes that help regulate the cell cycle.

Oncogenes are mutated tumor-suppressor genes.

Oncogenes are necessary genes that inhibit the cell cycle.

Which of the following mutations can help lead to cancer?

All of the above would lead to cancer

Mutations to tumor suppressor genes

What is a "benign" tumor?

A mass of cells that grows out of control but remains at the site of origin

A single mutated cell that could potentially develop into cancer

A mass of cells that grows out of control and spreads to other tissues

What is the main cause of cancer?

Exposure to carcinogens in the environment

DNA replication no longer working properly

Old age, during which the cells of the body no longer work properly

We do not currently know the main cause of cancer.

The Core Chapter 6 Test Review

Authored by Mandana Lagreca

Biology

University

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the monomer of the DNA molecule?

Polynucleotide

Monosaccharide

Nucleotide

Peptide

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What do the letters D-N-A stand for?

Dioxyribonucleic acid

Dioxyribonuclear acid

Deoxyribonucleic acid

Deoxyrobonuclear acid

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

A peptide bond

A hydrogen bond

A ionic bond

A covalent bond

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is different from one DNA nucleotide to the next?

The sugar molecule

The phosphate group

The base

The protein

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the three components of a DNA nucleotide?

A sugar, a phosphate and a base

A sugar, a base, and a polypeptide

A sugar, a phosphate, and a peptide

A phosphate, a base, and a polypeptide

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If you know that a DNA double helix consists of 20% adenine, what percentage of the DNA double helix is guanine (G)?

20%

30%

80%

There is not information to know

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which enzyme is responsible for adding complementary DNA bases to an exposed DNA strand?

DNA helicase

DNA polymerase

DNA ligase

DNA peptidase

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The Core Chapter 6 Test Review

What is the monomer of the DNA molecule?

What do the letters D-N-A stand for?

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

What is different from one DNA nucleotide to the next?

What are the three components of a DNA nucleotide?

If you know that a DNA double helix consists of 20% adenine, what percentage of the DNA double helix is guanine (G)?

Which enzyme is responsible for adding complementary DNA bases to an exposed DNA strand?

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

According to the base pairing rules of DNA, if the sequence of bases on one strand was AGGCCTTA, what would be the sequence of bases on the complementary strand?

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

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