Question 1

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)  tRNA 
A)  mRNA 
B)  rRNA 
C)  snRNA 
D)  tRNA

Question 2

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. 
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.

Question 3

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. 
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.

Question 4

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 × 107 
A)  1 × 106 
B)  1 × 109 
C)  1 × 1012 
D)  1 × 107

Question 5

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

Accepted Answer

A)  20 
B)  200 
C)  2000 
D)  20,000 
A)  20 
B)  200 
C)  2000 
D)  20,000

Question 6

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 nucleus 
A)  in the Golgi apparatus 
B)  in the endoplasmic reticulum 
C)  in the plasma membrane 
D)  in the nucleus

Question 7

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

Accepted Answer

A)  helicases 
B)  ligases 
C)  primases 
D)  restriction enzymes 
A)  helicases 
B)  ligases 
C)  primases 
D)  restriction enzymes

Question 8

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'-monophosphate 
A)  uridine 5'-monophosphate 
B)  deoxyuracil phosphate 
C)  uracil phosphate 
D)  deoxyuridine 5'-monophosphate

Question 9

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)  primases 
A)  gyrases 
B)  ligases 
C)  DNA polymerases 
D)  primases

Question 10

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. Watson 
A)  O. Avery 
B)  G. Beadle 
C)  E. Chargaff 
D)  J. Watson

Question 11

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. 
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.

Question 12

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. 
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.

Question 13

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-ribose 
A)  D-ribose 
B)  L-ribose 
C)  2-deoxy-D-ribose 
D)  2-deoxy-L-ribose

Question 14

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°C 
A)  25°C 
B)  50°C 
C)  70°C 
D)  95°C

Question 15

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 helix 
A)  a cloverleaf 
B)  a double helix 
C)  an L-shape 
D)  a single helix

Question 16

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

Question 17

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. 
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.

Question 18

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

Accepted Answer

A)  a base 
B)  a disaccharide 
C)  a monosaccharide 
D)  a phosphate 
A)  a base 
B)  a disaccharide 
C)  a monosaccharide 
D)  a phosphate

Question 19

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 these 
A)  reproducing itself 
B)  supplying information necessary to make proteins 
C)  reproducing itself and supplying information necessary to make proteins 
D)  none of these

Question 20

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. 
A)  the bases 
B)  the phosphates 
C)  the sugars 
D)  They are all part of the backbone.

Exam 24: Nucleotides, Nucleic Acids, and Heredity

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

How does thymine differ from uracil?

Which of the following statements describes the small ribosomal subunit?

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

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

Where is DNA located in a eukaryotic cell?

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

Which of the following is a nucleoside that contains uracil?

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

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

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

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

Which of the following sugars is found in RNA?

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

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

Where is CRISPR DNA found?

Which of the following statements is correct?

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

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

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

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters