Question 1

Based on this figure, which molecule (if any) could be attached to the 5' end of the right-hand DNA strand?

Accepted Answer

A)  phosphate
B)  deoxyribose
C)  cytosine
D)  adenine
E)  No molecule could attach to this end.

Question 2

In the comparison of a DNA molecule to a twisted ladder, the uprights of the ladder are:

Accepted Answer

A)  nitrogenous bases linked together.
B)  deoxyribose linked to phosphate.
C)  deoxyribose linked to sulfate.
D)  nitrogenous bases linked to phosphate.
E)  hydrogen bonds between bases.

Question 3

DNA polymerase and other repair enzymes ________ the newly synthesized DNA strand during and after the replication process.

Accepted Answer

The answer of DNA polymerase and other repair enzymes ________...

Question 4

Which of the following is TRUE in the Watson-Crick model of DNA?

Accepted Answer

A)  Ribose always bonds to a nitrogenous base.
B)  During replication, the phosphate groups are copied but the base sequence is not copied.
C)  Phosphate groups always bond to ribose.
D)  The number of adenines equals the number of guanines.
E)  Four different types of bases are found in DNA.

Question 5

Why did scientists initially think DNA would be a poor candidate for the hereditary information within a cell?

Accepted Answer

A)  Griffith's experiments suggested that protein was the hereditary material.
B)  Studies showed that viruses lacking DNA passed genetic traits to the next generation.
C)  DNA was shown to be made of only four different kinds of nucleotides.
D)  The work of Franklin and Wilkins showed that DNA could not be the hereditary material.

Question 6

In an analysis of the nucleotide composition of DNA to see which bases are equivalent in amount, which of the following is true?

Accepted Answer

A)  A = C
B)  A = G and C = T
C)  A + C = G + T
D)  A + T = C + G

Question 7

By the early 1900s, scientists had determined that heritable information existed as discrete units called genes, which were located on ________.

Accepted Answer

The answer of By the early 1900s, scientists had determined...

Question 8

What was the most significant conclusion of Griffith's experiments with pneumonia in mice?

Accepted Answer

A)  Mice exposed to the S-strain bacterium became resistant to the R-strain bacterium.
B)  There is a substance present in dead bacteria that can cause a heritable change in living bacteria.
C)  The genetic material was definitively proven to be DNA.
D)  S-strain bacteria can cause pneumonia.
E)  Heat destroys the hereditary material.

Question 9

A strand of DNA is a polymer of nucleotides held together by hydrogen bonds. True or False?

Accepted Answer

A) True 
 B)False

Question 10

When a cell divides:

Accepted Answer

A)  each daughter cell receives a nearly perfect copy of the parent cell's genetic information.
B)  each daughter cell receives exactly half the genetic information in the parent cell.
C)  each daughter cell receives the same amount of genetic information that was in the parent cell, but it has been altered.

Question 11

DNA helicase is involved in "rewinding" the strands of DNA back into a helix after replication. True or False?

Accepted Answer

A) True 
 B)False

Question 12

DNA possesses:

Accepted Answer

A)  A, U, G, and C bases.
B)  only C and T bases.
C)  only A and G bases.
D)  C, T, A, and G bases.
E)  both U and T bases.

Question 13

All of the following are found in DNA EXCEPT:

Accepted Answer

A)  deoxyribose.
B)  guanine.
C)  a phosphate group.
D)  a phospholipid group.
E)  thymine.

Question 14

Which of the following is TRUE regarding how the DNA in your body's cells can accumulate mutations?

Accepted Answer

A)  Mistakes are never made during DNA replication; they always occur during the G1 phase of interphase.
B)  Some DNA spontaneously breaks down every second, making the chromosome significantly shorter with every passing day.
C)  The ultraviolet radiation in sunlight may induce changes in DNA.
D)  Spontaneous mutation rates are around one in every four nucleotides that are replicated.

Question 15

For the DNA sequence G-C-C-T-A-T in one polynucleotide chain, the sequence found in the other polynucleotide chain must be:

Accepted Answer

A)  C-G-G-A-T-A.
B)  G-C-C-A-T-A.
C)  C-G-G-A-U-A.
D)  A-T-T-C-G-C.
E)  G-C-C-T-A-T.

Question 16

All of the following occur during DNA replication EXCEPT the:

Accepted Answer

A)  separation of parental DNA strands.
B)  use of parental DNA as a template.
C)  use of DNA polymerase enzymes.
D)  synthesis of totally new double-stranded DNA molecules.

Question 17

The DNA of chromosomes is composed of two strands wound about each other in the shape of a ________.

Accepted Answer

double hel...

Question 18

The hereditary material present in all cells is:

Accepted Answer

A)  protein.
B)  RNA.
C)  DNA.
D)  R-strain.
E)  S-strain.

Question 19

During DNA replication, the continuous daughter strand is the leading strand. True or False?

Accepted Answer

A) True 
 B)False

Question 20

Briefly describe the basic process of DNA replication.

Accepted Answer

DNA helicase unwinds the double helix of...

Exam 11: Dna: the Molecule of Heredity

For the DNA sequence G-C-C-T-A-T in one polynucleotide chain, the sequence found in the other polynucleotide chain must be:

Correct AnswerverifiedShow Answer

During DNA replication, the continuous daughter strand is the leading strand. True or False?

Correct AnswerverifiedShow Answer

Which of the following is TRUE in the Watson-Crick model of DNA?

Correct AnswerverifiedShow Answer

A strand of DNA is a polymer of nucleotides held together by hydrogen bonds. True or False?

Correct AnswerverifiedShow Answer

What was the most significant conclusion of Griffith's experiments with pneumonia in mice?

Correct AnswerverifiedShow Answer

The hereditary material present in all cells is:

Correct AnswerverifiedShow Answer

The DNA of chromosomes is composed of two strands wound about each other in the shape of a ________.

Correct Answerverifieddouble hel...View AnswerShow Answer

Briefly describe the basic process of DNA replication.

Correct AnswerverifiedDNA helicase unwinds the double helix of...View AnswerShow Answer

In the comparison of a DNA molecule to a twisted ladder, the uprights of the ladder are:

Correct AnswerverifiedShow Answer

Which of the following is TRUE regarding how the DNA in your body's cells can accumulate mutations?

Correct AnswerverifiedShow Answer

Based on this figure, which molecule (if any) could be attached to the 5' end of the right-hand DNA strand?

Correct AnswerverifiedShow Answer

In an analysis of the nucleotide composition of DNA to see which bases are equivalent in amount, which of the following is true?

Correct AnswerverifiedShow Answer

When a cell divides:

Correct AnswerverifiedShow Answer

Why did scientists initially think DNA would be a poor candidate for the hereditary information within a cell?

Correct AnswerverifiedShow Answer

DNA polymerase and other repair enzymes ________ the newly synthesized DNA strand during and after the replication process.

Correct AnswerverifiedShow Answer

All of the following occur during DNA replication EXCEPT the:

Correct AnswerverifiedShow Answer

DNA possesses:

Correct AnswerverifiedShow Answer

DNA helicase is involved in "rewinding" the strands of DNA back into a helix after replication. True or False?

Correct AnswerverifiedShow Answer

All of the following are found in DNA EXCEPT:

Correct AnswerverifiedShow Answer

By the early 1900s, scientists had determined that heritable information existed as discrete units called genes, which were located on ________.

Correct AnswerverifiedShow Answer

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double hel...
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DNA helicase unwinds the double helix of...
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