Question 1

Which of the following is the correct expansion of CRISPR?

Accepted Answer

A)  connected and regulated important short portions of RNA 
B)  clustered regularly interspaced short palindromic repeats 
C)  clustered regularly interspaced short portions of RNA 
D)  connected and regulated interspaced palindromic RNA 
A)  connected and regulated important short portions of RNA 
B)  clustered regularly interspaced short palindromic repeats 
C)  clustered regularly interspaced short portions of RNA 
D)  connected and regulated interspaced palindromic RNA

Question 2

How many different kinds of nucleic acids exist?

Accepted Answer

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

Question 3

Which of the following RNA molecules is degraded by an siRNA molecule?

Accepted Answer

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

Question 4

Which of the following is true if unwinding occurs in the middle of a molecule of DNA?

Accepted Answer

A)  Replication occurs only in the forward direction. 
B)  Replication occurs only in the reverse direction. 
C)  Replication occurs in both directions. 
D)  Replication does not occur. 
A)  Replication occurs only in the forward direction. 
B)  Replication occurs only in the reverse direction. 
C)  Replication occurs in both directions. 
D)  Replication does not occur.

Question 5

Which of the following statements is true of primers?

Accepted Answer

A)  They are long nucleotide fragments. 
B)  They are RNA oligonucleotides. 
C)  They act as strong oxidizing agents. 
D)  They are synthesized from deoxyribonucleoside diphosphates. 
A)  They are long nucleotide fragments. 
B)  They are RNA oligonucleotides. 
C)  They act as strong oxidizing agents. 
D)  They are synthesized from deoxyribonucleoside diphosphates.

Question 6

Which of the following correctly describes the linkages found in ATP?

Accepted Answer

A)  one anhydride and two esters 
B)  two anhydrides and one ester 
C)  three anhydrides and no esters 
D)  three esters and no anhydrides 
A)  one anhydride and two esters 
B)  two anhydrides and one ester 
C)  three anhydrides and no esters 
D)  three esters and no anhydrides

Question 7

Which of the following sugars is found in DNA?

Accepted Answer

A)  3-deoxy- L-ribose 
B)  2-deoxy-D-ribose 
C)  2-deoxy-L-ribose 
D)  3-deoxy-D-ribose 
A)  3-deoxy- L-ribose 
B)  2-deoxy-D-ribose 
C)  2-deoxy-L-ribose 
D)  3-deoxy-D-ribose

Question 8

Which of the following correctly describes satellites and telomeres?

Accepted Answer

A)  Both can occur at the ends or in the middle of chromosomes. 
B)  Both can occur only at the ends of chromosomes. 
C)  Satellites occur only at the ends of chromosomes, but telomeres can be found at the ends or in the middle of chromosomes. 
D)  Telomeres occur only at the ends of chromosomes, but satellites can be found at the ends or in the middle of chromosomes. 
A)  Both can occur at the ends or in the middle of chromosomes. 
B)  Both can occur only at the ends of chromosomes. 
C)  Satellites occur only at the ends of chromosomes, but telomeres can be found at the ends or in the middle of chromosomes. 
D)  Telomeres occur only at the ends of chromosomes, but satellites can be found at the ends or in the middle of chromosomes.

Question 9

Which type of RNA degrades specific mRNA molecules?

Accepted Answer

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

Question 10

Which of the following is a function of a clamp protein?

Accepted Answer

A)  It joins two nucleotides in a leading strand. 
B)  It helps synthesize short oligonucleotides. 
C)  It allows the leading strand to be threaded through it. 
D)  It joins Okazaki fragments in a lagging strand. 
A)  It joins two nucleotides in a leading strand. 
B)  It helps synthesize short oligonucleotides. 
C)  It allows the leading strand to be threaded through it. 
D)  It joins Okazaki fragments in a lagging strand.

Question 11

Which of the following is true of thymine and uracil?

Accepted Answer

A)  Both have a methyl group at C-5. 
B)  Thymine has a methyl group at C-5, but uracil does not. 
C)  Uracil has a methyl group at C-5, but thymine does not. 
D)  Neither has a methyl group at C-5. 
A)  Both have a methyl group at C-5. 
B)  Thymine has a methyl group at C-5, but uracil does not. 
C)  Uracil has a methyl group at C-5, but thymine does not. 
D)  Neither has a methyl group at C-5.

Question 12

Which type of RNA is used to prevent the expression of an undesirable gene?

Accepted Answer

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

Question 13

Hybridization in PCR involves which of the following?

Accepted Answer

A)  covalent bonds 
B)  dipole-dipole interactions 
C)  ionic bonds 
D)  hydrogen bonds 
A)  covalent bonds 
B)  dipole-dipole interactions 
C)  ionic bonds 
D)  hydrogen bonds

Question 14

Which of the following enzymes are used for DNA fingerprinting?

Accepted Answer

A)  DNA polymerases 
B)  ligases 
C)  proteases 
D)  restriction enzymes 
A)  DNA polymerases 
B)  ligases 
C)  proteases 
D)  restriction enzymes

Question 15

Which of the following does not have a primary amine as part of its structure?

Accepted Answer

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

Question 16

During the opening of a condensed chromosome superstructure, at which residues of histones does acetylation occur?

Accepted Answer

A)  cysteine 
B)  histidine 
C)  lysine 
D)  phenylalanine 
A)  cysteine 
B)  histidine 
C)  lysine 
D)  phenylalanine

Question 17

Which of the following is true of DNA and RNA?

Accepted Answer

A)  Both DNA and RNA are found in chromosomes. 
B)  DNA is found in chromosomes, but RNA is not. 
C)  RNA is found in chromosomes, but DNA is not. 
D)  Neither DNA nor RNA is found in chromosomes. 
A)  Both DNA and RNA are found in chromosomes. 
B)  DNA is found in chromosomes, but RNA is not. 
C)  RNA is found in chromosomes, but DNA is not. 
D)  Neither DNA nor RNA is found in chromosomes.

Question 18

Why is DNA replication considered semiconservative?

Accepted Answer

A)  because one strand of new DNA is partially synthesized 
B)  because each new molecule of DNA contains one leading strand and one lagging strand 
C)  because each new molecule of DNA contains one parental strand and one new strand 
D)  because of all these reasons 
A)  because one strand of new DNA is partially synthesized 
B)  because each new molecule of DNA contains one leading strand and one lagging strand 
C)  because each new molecule of DNA contains one parental strand and one new strand 
D)  because of all these reasons

Question 19

Which pair of bases is linked together by two hydrogen bonds?

Accepted Answer

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

Question 20

How many nucleosomes form the repeating unit of chromatin?

Accepted Answer

A)  2 
B)  4 
C)  6 
D)  8 
A)  2 
B)  4 
C)  6 
D)  8

Exam 24: Nucleotides, Nucleic Acids, and Heredity

Which of the following is the correct expansion of CRISPR?

How many different kinds of nucleic acids exist?

Which of the following RNA molecules is degraded by an siRNA molecule?

Which of the following is true if unwinding occurs in the middle of a molecule of DNA?

Which of the following statements is true of primers?

Which of the following correctly describes the linkages found in ATP?

Which of the following sugars is found in DNA?

Which of the following correctly describes satellites and telomeres?

Which type of RNA degrades specific mRNA molecules?

Which of the following is a function of a clamp protein?

Which of the following is true of thymine and uracil?

Which type of RNA is used to prevent the expression of an undesirable gene?

Hybridization in PCR involves which of the following?

Which of the following enzymes are used for DNA fingerprinting?

Which of the following does not have a primary amine as part of its structure?

During the opening of a condensed chromosome superstructure, at which residues of histones does acetylation occur?

Which of the following is true of DNA and RNA?

Why is DNA replication considered semiconservative?

Which pair of bases is linked together by two hydrogen bonds?

How many nucleosomes form the repeating unit of chromatin?

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

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