Question 1

Which of the following statements is true of a molecule of tRNA?

Accepted Answer

A)  It contains 73-93 nucleotides per chain. 
B)  It is about the same size as an average-sized molecule of mRNA. 
C)  It is much larger than an average-sized molecule of mRNA. 
D)  It contains 200-250 nucleotides per chain. 
A)  It contains 73-93 nucleotides per chain. 
B)  It is about the same size as an average-sized molecule of mRNA. 
C)  It is much larger than an average-sized molecule of mRNA. 
D)  It contains 200-250 nucleotides per chain.

Question 2

Which of the following statements is true of the two daughter strands of DNA?

Accepted Answer

A)  They are both synthesized continuously. 
B)  They are both synthesized discontinuously. 
C)  The lagging strand is synthesized continuously, but the leading strand is synthesized discontinuously. 
D)  The leading strand is synthesized continuously, but the lagging strand is synthesized discontinuously. 
A)  They are both synthesized continuously. 
B)  They are both synthesized discontinuously. 
C)  The lagging strand is synthesized continuously, but the leading strand is synthesized discontinuously. 
D)  The leading strand is synthesized continuously, but the lagging strand is synthesized discontinuously.

Question 3

Where are satellites located on the chromosomes?

Accepted Answer

A)  between the center and the ends 
B)  only at the ends 
C)  only at the centers 
D)  at both the centers and the ends 
A)  between the center and the ends 
B)  only at the ends 
C)  only at the centers 
D)  at both the centers and the ends

Question 4

Which of the following molecules are genes made of?

Accepted Answer

A)  DNA 
B)  histones 
C)  carbohydrates 
D)  RNA 
A)  DNA 
B)  histones 
C)  carbohydrates 
D)  RNA

Question 5

How many different chemical units make up a nucleotide?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
A)  2 
B)  3 
C)  4 
D)  5

Question 6

How many different bases are found in DNA?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 7

Which of the following statements best describes the secondary structure of DNA?

Accepted Answer

A)  It is a double helix with the bases on the inside. 
B)  It is a double helix with the bases on the outside. 
C)  It is a single helix. 
D)  It is a triple helix. 
A)  It is a double helix with the bases on the inside. 
B)  It is a double helix with the bases on the outside. 
C)  It is a single helix. 
D)  It is a triple helix.

Question 8

What is transcription?

Accepted Answer

A)  It is the synthesis of a new DNA strand using a parental DNA strand as the template. 
B)  It is the process for the transfer of genetic information from DNA to RNA. 
C)  It is the process for the transfer of genetic information from RNA to DNA. 
D)  It is the synthesis of proteins in the cell cytoplasm with the help of ribosomes. 
A)  It is the synthesis of a new DNA strand using a parental DNA strand as the template. 
B)  It is the process for the transfer of genetic information from DNA to RNA. 
C)  It is the process for the transfer of genetic information from RNA to DNA. 
D)  It is the synthesis of proteins in the cell cytoplasm with the help of ribosomes.

Question 9

Examine the given structural formula that consists of an adenine molecule bonded to a five-carbon sugar molecule.   Which of the following is the name of this substance?

Accepted Answer

A)  adenosine 
B)  deoxyadenosine 
C)  riboxyadenosine 
D)  deoxyadenine 
A)  adenosine 
B)  deoxyadenosine 
C)  riboxyadenosine 
D)  deoxyadenine

Question 10

Which of the following bases is found only in RNA and not in DNA?

Accepted Answer

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

Question 11

Where in the nucleosome are the histones found?

Accepted Answer

A)  in the core with the DNA double helix wrapped around them 
B)  on the outer layer wrapped around the DNA double helix 
C)  uniformly distributed 
D)  in all of these arrangements 
A)  in the core with the DNA double helix wrapped around them 
B)  on the outer layer wrapped around the DNA double helix 
C)  uniformly distributed 
D)  in all of these arrangements

Question 12

Which of the following statements is correct?

Accepted Answer

A)  Adenine and guanine are both purines. 
B)  Adenine and guanine are both pyrimidines. 
C)  Adenine is a purine, and guanine is a pyrimidine. 
D)  Adenine is a pyrimidine, and guanine is a purine. 
A)  Adenine and guanine are both purines. 
B)  Adenine and guanine are both pyrimidines. 
C)  Adenine is a purine, and guanine is a pyrimidine. 
D)  Adenine is a pyrimidine, and guanine is a purine.

Question 13

Which of the following correctly gives the base sequence that would replace the numbers 1-4 in the following segment of DNA?

Accepted Answer

A)  AGTC 
B)  TCAG 
C)  UCAG 
D)  CTGA 
A)  AGTC 
B)  TCAG 
C)  UCAG 
D)  CTGA

Question 14

snRNA is involved in which of the following processes?

Accepted Answer

A)  splicing 
B)  transcription 
C)  translation 
D)  none of these 
A)  splicing 
B)  transcription 
C)  translation 
D)  none of these

Question 15

Which of the following is true of the telomeres found in vertebrates?

Accepted Answer

A)  The base sequence GGATTG is repeated a few times. 
B)  The base sequence GGATTG is repeated hundreds to thousands of times. 
C)  The base sequence TTAGGG is repeated a few times. 
D)  The base sequence TTAGGG is repeated hundreds to thousands of times. 
A)  The base sequence GGATTG is repeated a few times. 
B)  The base sequence GGATTG is repeated hundreds to thousands of times. 
C)  The base sequence TTAGGG is repeated a few times. 
D)  The base sequence TTAGGG is repeated hundreds to thousands of times.

Question 16

Examine the following structural formula containing guanine, a sugar, and phosphate groups.   Which of the following types of bases and sugars does this substance contain?

Accepted Answer

A)  a purine base and a ribose sugar 
B)  a purine base and a deoxyribose sugar 
C)  a pyrimidine base and a ribose sugar 
D)  a pyrimidine base and a deoxyribose sugar 
A)  a purine base and a ribose sugar 
B)  a purine base and a deoxyribose sugar 
C)  a pyrimidine base and a ribose sugar 
D)  a pyrimidine base and a deoxyribose sugar

Question 17

Examine the given structural formula that consists of an adenine molecule bonded to a five-carbon sugar molecule.   How is this substance classified?

Accepted Answer

A)  as a nucleic acid 
B)  as a nucleoside 
C)  as a nucleotide 
D)  as an amino acid 
E)  as a fatty acid 
A)  as a nucleic acid 
B)  as a nucleoside 
C)  as a nucleotide 
D)  as an amino acid 
E)  as a fatty acid

Question 18

Which of the following base pairs is found in RNA?

Accepted Answer

A)  guanine and adenine 
B)  adenine and cytosine 
C)  guanine and uracil 
D)  adenine and uracil 
A)  guanine and adenine 
B)  adenine and cytosine 
C)  guanine and uracil 
D)  adenine and uracil

Question 19

Which of the following make up a nucleoside?

Accepted Answer

A)  base + sugar 
B)  base + phosphate 
C)  base + phosphate + sugar 
D)  phosphate + sugar 
A)  base + sugar 
B)  base + phosphate 
C)  base + phosphate + sugar 
D)  phosphate + sugar

Question 20

How many histones are part of a nucleosome?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  8 
A)  1 
B)  2 
C)  4 
D)  8

Exam 24: Nucleotides, Nucleic Acids, and Heredity

Which of the following statements is true of a molecule of tRNA?

Which of the following statements is true of the two daughter strands of DNA?

Where are satellites located on the chromosomes?

Which of the following molecules are genes made of?

How many different chemical units make up a nucleotide?

How many different bases are found in DNA?

Which of the following statements best describes the secondary structure of DNA?

What is transcription?

Examine the given structural formula that consists of an adenine molecule bonded to a five-carbon sugar molecule. Which of the following is the name of this substance?

Which of the following bases is found only in RNA and not in DNA?

Where in the nucleosome are the histones found?

Which of the following statements is correct?

Which of the following correctly gives the base sequence that would replace the numbers 1-4 in the following segment of DNA?

snRNA is involved in which of the following processes?

Which of the following is true of the telomeres found in vertebrates?

Examine the following structural formula containing guanine, a sugar, and phosphate groups. Which of the following types of bases and sugars does this substance contain?

Examine the given structural formula that consists of an adenine molecule bonded to a five-carbon sugar molecule. How is this substance classified?

Which of the following base pairs is found in RNA?

Which of the following make up a nucleoside?

How many histones are part of a nucleosome?

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