Bacteria are grown in a medium containing 15NH4Cl for a number of generations so that all of the DNA is made of fully "heavy" DNA.The bacteria are moved to a new medium and grown in 14NH4Cl so that all new DNA will be "light".If replication were dispersive,what would the DNA look like after two generation times.

A) All of the DNA is made of 2 "light" strands. B) Half of the DNA is made of 2 "light" strands and half of the DNA is made of 1 "light" strand and 1 "heavy" strand. C) All of the DNA is made of 1 "heavy" strand and 1 "light" strand. D) Each strand is made of a mixture of "heavy" and "light" DNA,with each strand being between 75% and 100% "light". E) 75% of the DNA is made of 2 "light" strands and 25% of the DNA is made of 2 "heavy" strands. A) All of the DNA is made of 2 "light" strands. B) Half of the DNA is made of 2 "light" strands and half of the DNA is made of 1 "light" strand and 1 "heavy" strand. C) All of the DNA is made of 1 "heavy" strand and 1 "light" strand. D) Each strand is made of a mixture of "heavy" and "light" DNA,with each strand being between 75% and 100% "light". E) 75% of the DNA is made of 2 "light" strands and 25% of the DNA is made of 2 "heavy" strands.

Exam 13: Dna Replication and Repair

Bacteria are grown in a medium containing ¹⁵NH₄Cl for a number of generations so that all of the DNA is made of fully "heavy" DNA.The bacteria are moved to a new medium and grown in ¹⁴NH₄Cl so that all new DNA will be "light".If replication were dispersive,what would the DNA look like after two generation times.

(Multiple Choice)

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Question 61

What is the average rate of replication in bacteria like E.coli?

(Multiple Choice)

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Question 62

What enzyme is responsible for recognizing a chemical alteration in the DNA and removing the base by cleavage of the bond holding the base to the deoxyribose sugar moiety?

(Multiple Choice)

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Question 63

The specific site on the bacterial chromosome at which replication begins is called the ________.

(Multiple Choice)

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Question 64

Replication moves outward from the origin in direction(s)and is said to be .

(Multiple Choice)

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Question 65

You are the enzyme responsible for carrying out mismatch repair.You notice a mismatched pair in the DNA strand and you know it is your job to remove one of the bases in the mismatched pair.How would you decide which nucleotide to remove?

(Essay)

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Question 66

After cuts are made on the two sides of the lesion in nucleotide excision repair,what holds the damaged part of the strand in position for a while before its final removal?

(Multiple Choice)

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Question 67

Which DNA repair mechanism removes altered nucleotides generated by reactive chemicals present in the diet or produced by metabolism?

(Multiple Choice)

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Question 68

The DNA strand growing toward the replication fork grows in a 5'->3' direction as the replication fork advances and is called the __.

(Multiple Choice)

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Question 69

Who was the first to purify an enzyme from bacterial extracts that could incorporate DNA precursors into a polymer?

(Multiple Choice)

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Question 70

What is responsible for joining the last deoxyribonucleotide added during RNA primer digestion and the 5' end of the previously synthesized and adjacent DNA fragment?

(Multiple Choice)

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Question 71

What technique was used in the discovery of the existence in eukaryotic cells of replicons,a discovery in which single DNA molecules were shown to be replicated simultaneously at several sites along their length?

(Multiple Choice)

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Question 72

Which eukaryotic DNA polymerase is thought to be the primary DNA-synthesizing enzyme during replication of the leading strand?

(Multiple Choice)

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Question 73

Which eukaryotic DNA polymerase appears to be the primary DNA-synthesizing enzyme during replication of the leading strand?

(Multiple Choice)

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Question 74

Cutting of the damaged strand on both sides of lesion by endonucleases

(Multiple Choice)

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Question 75

All DNA polymerases lay down nucleotides in a direction and move along the template in a _ direction.

(Multiple Choice)

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Question 76

Cyclin-dependent kinase activity stays high through mitosis after rising prior to DNA synthesis.Which of the following results from its elevated activity?

(Multiple Choice)

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Question 77

___ are DNA unwinding enzymes that unwind the DNA in a reaction using the energy from to move along one of the DNA strands,breaking the _ holding the two strands together.

(Multiple Choice)

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Question 78

The small portions in which eukaryotic cells replicate their genomes are called _______.

(Multiple Choice)

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Question 79

In bacteria,a _ is formed when a associates transiently with a _.

(Multiple Choice)

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Question 80

Showing 61 - 80 of 92

What is the average rate of replication in bacteria like E.coli?

What enzyme is responsible for recognizing a chemical alteration in the DNA and removing the base by cleavage of the bond holding the base to the deoxyribose sugar moiety?

The specific site on the bacterial chromosome at which replication begins is called the ________.

Replication moves outward from the origin in direction(s)and is said to be .

You are the enzyme responsible for carrying out mismatch repair.You notice a mismatched pair in the DNA strand and you know it is your job to remove one of the bases in the mismatched pair.How would you decide which nucleotide to remove?

After cuts are made on the two sides of the lesion in nucleotide excision repair,what holds the damaged part of the strand in position for a while before its final removal?

Which DNA repair mechanism removes altered nucleotides generated by reactive chemicals present in the diet or produced by metabolism?

The DNA strand growing toward the replication fork grows in a 5'->3' direction as the replication fork advances and is called the __.

Who was the first to purify an enzyme from bacterial extracts that could incorporate DNA precursors into a polymer?

What is responsible for joining the last deoxyribonucleotide added during RNA primer digestion and the 5' end of the previously synthesized and adjacent DNA fragment?

What technique was used in the discovery of the existence in eukaryotic cells of replicons,a discovery in which single DNA molecules were shown to be replicated simultaneously at several sites along their length?

Which eukaryotic DNA polymerase is thought to be the primary DNA-synthesizing enzyme during replication of the leading strand?

Which eukaryotic DNA polymerase appears to be the primary DNA-synthesizing enzyme during replication of the leading strand?

Cutting of the damaged strand on both sides of lesion by endonucleases

All DNA polymerases lay down nucleotides in a direction and move along the template in a _ direction.

Cyclin-dependent kinase activity stays high through mitosis after rising prior to DNA synthesis.Which of the following results from its elevated activity?

___ are DNA unwinding enzymes that unwind the DNA in a reaction using the energy from to move along one of the DNA strands,breaking the _ holding the two strands together.

The small portions in which eukaryotic cells replicate their genomes are called _______.

In bacteria,a _ is formed when a associates transiently with a _.

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

Exam 13: Dna Replication and Repair

What is the average rate of replication in bacteria like E.coli?

What enzyme is responsible for recognizing a chemical alteration in the DNA and removing the base by cleavage of the bond holding the base to the deoxyribose sugar moiety?

The specific site on the bacterial chromosome at which replication begins is called the ________.

Replication moves outward from the origin in ________ direction(s)and is said to be ________.

You are the enzyme responsible for carrying out mismatch repair.You notice a mismatched pair in the DNA strand and you know it is your job to remove one of the bases in the mismatched pair.How would you decide which nucleotide to remove?

After cuts are made on the two sides of the lesion in nucleotide excision repair,what holds the damaged part of the strand in position for a while before its final removal?

Which DNA repair mechanism removes altered nucleotides generated by reactive chemicals present in the diet or produced by metabolism?

The DNA strand growing toward the replication fork grows ______ in a 5'->3' direction as the replication fork advances and is called the ________.

Who was the first to purify an enzyme from bacterial extracts that could incorporate DNA precursors into a polymer?

What is responsible for joining the last deoxyribonucleotide added during RNA primer digestion and the 5' end of the previously synthesized and adjacent DNA fragment?

What technique was used in the discovery of the existence in eukaryotic cells of replicons,a discovery in which single DNA molecules were shown to be replicated simultaneously at several sites along their length?

Which eukaryotic DNA polymerase is thought to be the primary DNA-synthesizing enzyme during replication of the leading strand?

Which eukaryotic DNA polymerase appears to be the primary DNA-synthesizing enzyme during replication of the leading strand?

Cutting of the damaged strand on both sides of lesion by endonucleases

All DNA polymerases lay down nucleotides in a ______ direction and move along the template in a _______ direction.

Cyclin-dependent kinase activity stays high through mitosis after rising prior to DNA synthesis.Which of the following results from its elevated activity?

_________ are DNA unwinding enzymes that unwind the DNA in a reaction using the energy from ________ to move along one of the DNA strands,breaking the _______ holding the two strands together.

The small portions in which eukaryotic cells replicate their genomes are called _______.

In bacteria,a _______ is formed when a ________ associates transiently with a _______.

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

Replication moves outward from the origin in direction(s)and is said to be .

The DNA strand growing toward the replication fork grows in a 5'->3' direction as the replication fork advances and is called the __.

All DNA polymerases lay down nucleotides in a direction and move along the template in a _ direction.

___ are DNA unwinding enzymes that unwind the DNA in a reaction using the energy from to move along one of the DNA strands,breaking the _ holding the two strands together.

In bacteria,a _ is formed when a associates transiently with a _.