Question 1

Which of the following is a nucleoside that contains uracil?

Accepted Answer

A)   uridine 5'-monophosphate
B)   deoxyuracil phosphate
C)   uracil phosphate
D)   deoxyuridine 5'-monophosphateE) None of the above
F) A) and D)

Question 2

Approximately how many cells are present in the body of a human adult?

Accepted Answer

A)   1 × 106
B)   1 × 109
C)   1 × 1012
D)   1 × 107E) None of the above
F) All of the above

Question 3

Which of the following sugars is found in RNA?

Accepted Answer

A)   D-ribose
B)   L-ribose
C)   2-deoxy-D-ribose
D)   2-deoxy-L-riboseE) B) and C)
F) A) and D)

Question 4

Which of the following are not part of the backbone of DNA?

Accepted Answer

A)   the bases
B)   the phosphates
C)   the sugars
D)   They are all part of the backbone.E) A) and B)
F) All of the above

Question 5

Which of the following best describes the three-dimensional structure of tRNA?

Accepted Answer

A)   a cloverleaf
B)   a double helix
C)   an L-shape
D)   a single helixE) All of the above
F) C) and D)

Question 6

Which of the following scientists is most closely associated with analyzing the base content of DNA?

Accepted Answer

A)   O. Avery
B)   G. Beadle
C)   E. Chargaff
D)   J. WatsonE) B) and D)
F) A) and D)

Question 7

Approximately how many nucleotides are present in the Okazaki fragments in prokaryotes?

Accepted Answer

A)   20
B)   200
C)   2000
D)   20,000E) A) and B)
F) A) and C)

Question 8

Which of the following types of enzyme ensures that the correct base for growing the chain is aligned with the template chain?

Accepted Answer

A)   gyrases
B)   ligases
C)   DNA polymerases
D)   primasesE) A) and B)
F) A) and C)

Question 9

Which type of RNA complexes with proteins to form RNA molecules that aid the process of splicing in a cell nucleus?

Accepted Answer

A)   mRNA
B)   rRNA
C)   snRNA
D)   tRNAE) A) and B)
F) None of the above

Question 10

How does thymine differ from uracil?

Accepted Answer

A)   Unlike uracil, thymine is bonded to a methyl group at position 5.
B)   Unlike uracil, thymine has a carbonyl carbon at position 2.
C)   Unlike uracil, thymine is bonded to an amine group at position 5.
D)   Unlike uracil, thymine has a double bond between the carbons of positions 5 and 6.E) B) and C)
F) A) and B)

Question 11

Which of the following statements is correct?

Accepted Answer

A)   Cytosine and thymine are both purines.
B)   Cytosine and thymine are both pyrimidines.
C)   Cytosine is a purine, and thymine is a pyrimidine.
D)   Cytosine is a pyrimidine, and thymine is a purine.E) All of the above
F) None of the above

Question 12

Which of the following enzymes are used to join Okazaki fragments?

Accepted Answer

A)   helicases
B)   ligases
C)   primases
D)   restriction enzymesE) B) and D)
F) None of the above

Question 13

In PCR, what temperature is needed to unwind DNA and make it single stranded so that it can hybridize with the primer?

Accepted Answer

A)   25°C
B)   50°C
C)   70°C
D)   95°CE) B) and D)
F) A) and C)

Question 14

What is a function of the DNA present in the chromosomes of a cell?

Accepted Answer

A)   reproducing itself
B)   supplying information necessary to make proteins
C)   reproducing itself and supplying information necessary to make proteins
D)   none of theseE) None of the above
F) B) and C)

Question 15

Which of the following statements describes the small ribosomal subunit?

Accepted Answer

A)   It consists of one large RNA molecule and approximately 20 different proteins.
B)   It consists of one small RNA molecule and approximately 35 different proteins.
C)   It consists of two RNA molecules and approximately 20 different proteins.
D)   It consists of two RNA molecules and approximately 35 different proteins.E) C) and D)
F) A) and B)

Question 16

Which of the following is not a component of a nucleotide?

Accepted Answer

A)   a base
B)   a disaccharide
C)   a monosaccharide
D)   a phosphateE) A) and B)
F) A) and D)

Question 17

Which of the following statements is true of the lagging strand?

Accepted Answer

A)   It is synthesized discontinuously along the 3'-to-5' strand.
B)   It is synthesized continuously along the 3'-to-5' strand.
C)   It is synthesized continuously.
D)   It is synthesized discontinuously.E) A) and B)
F) A) and C)

Question 18

Which of the following is a correct statement about the distribution of genes in a molecule of DNA?

Accepted Answer

A)   In both bacteria and higher organisms, the genes are continuous.
B)   In both bacteria and higher organisms, the genes are discontinuous.
C)   In bacteria, the genes are continuous, but in higher organisms, they are discontinuous.
D)   In bacteria, the genes are discontinuous, but in higher organisms, they are continuous.E) B) and D)
F) A) and B)

Question 19

Where is DNA located in a eukaryotic cell?

Accepted Answer

A)   in the Golgi apparatus
B)   in the endoplasmic reticulum
C)   in the plasma membrane
D)   in the nucleusE) B) and C)
F) All of the above

Question 20

Where is CRISPR DNA found?

Accepted Answer

A)   in fungi and algae
B)   in bacteria and archaea
C)   in algae and protozoa
D)   in viruses and fungiE) A) and B)
F) A) and C)

Exam 24: Nucleotides, Nucleic Acids, and Heredity

Which of the following types of enzyme ensures that the correct base for growing the chain is aligned with the template chain?

Correct AnswerverifiedShow Answer

Which of the following enzymes are used to join Okazaki fragments?

Correct AnswerverifiedShow Answer

Approximately how many nucleotides are present in the Okazaki fragments in prokaryotes?

Correct AnswerverifiedShow Answer

Where is DNA located in a eukaryotic cell?

Correct AnswerverifiedShow Answer

Which of the following is not a component of a nucleotide?

Correct AnswerverifiedShow Answer

Which of the following statements is true of the lagging strand?

Correct AnswerverifiedShow Answer

Which of the following is a nucleoside that contains uracil?

Correct AnswerverifiedShow Answer

Where is CRISPR DNA found?

Correct AnswerverifiedShow Answer

Which of the following sugars is found in RNA?

Correct AnswerverifiedShow Answer

Which of the following scientists is most closely associated with analyzing the base content of DNA?

Correct AnswerverifiedShow Answer

Approximately how many cells are present in the body of a human adult?

Correct AnswerverifiedShow Answer

Which type of RNA complexes with proteins to form RNA molecules that aid the process of splicing in a cell nucleus?

Correct AnswerverifiedShow Answer

Which of the following statements is correct?

Correct AnswerverifiedShow Answer

Which of the following statements describes the small ribosomal subunit?

Correct AnswerverifiedShow Answer

What is a function of the DNA present in the chromosomes of a cell?

Correct AnswerverifiedShow Answer

Which of the following are not part of the backbone of DNA?

Correct AnswerverifiedShow Answer

In PCR, what temperature is needed to unwind DNA and make it single stranded so that it can hybridize with the primer?

Correct AnswerverifiedShow Answer

Which of the following best describes the three-dimensional structure of tRNA?

Correct AnswerverifiedShow Answer

How does thymine differ from uracil?

Correct AnswerverifiedShow Answer

Which of the following is a correct statement about the distribution of genes in a molecule of DNA?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified