Question 1

In eukaryotic cells where is DNA found?

Accepted Answer

A)  in the cytoplasm 
B)  in the endoplasmic reticulum 
C)  in the lipid bilayer 
D)  in the nucleus 
A)  in the cytoplasm 
B)  in the endoplasmic reticulum 
C)  in the lipid bilayer 
D)  in the nucleus D

Question 2

Approximately what percentage of human DNA codes for proteins?

Accepted Answer

A)  3% 
B)  50% 
C)  75% 
D)  97% 
A)  3% 
B)  50% 
C)  75% 
D)  97% A

Question 3

Transcription corresponds to which of the following?

Accepted Answer

A)  the separation of the two strands of DNA to enable the formation of two identical DNA molecules 
B)  the transfer of genetic information from DNA to RNA 
C)  the transfer of genetic information from RNA to DNA 
D)  the use of genetic information to synthesize a specific protein 
A)  the separation of the two strands of DNA to enable the formation of two identical DNA molecules 
B)  the transfer of genetic information from DNA to RNA 
C)  the transfer of genetic information from RNA to DNA 
D)  the use of genetic information to synthesize a specific protein B

Question 4

Which type 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 5

Which of the following best characterizes the function of introns?

Accepted Answer

A)  They serve only as spacers. 
B)  They serve only as enzymes to properly splice exons. 
C)  They are most frequently spacers and rarely function as splicing enzymes. 
D)  they are most frequently splicing enzymes and rarely function as spacers. 
A)  They serve only as spacers. 
B)  They serve only as enzymes to properly splice exons. 
C)  They are most frequently spacers and rarely function as splicing enzymes. 
D)  they are most frequently splicing enzymes and rarely function as spacers.

Question 6

Primers are periodically placed in which of the following?

Accepted Answer

A)  the daughter of the lagging strand synthesis 
B)  the daughter of the leading strand synthesis 
C)  both newly synthesized strands 
D)  neither newly synthesized strand 
A)  the daughter of the lagging strand synthesis 
B)  the daughter of the leading strand synthesis 
C)  both newly synthesized strands 
D)  neither newly synthesized strand

Question 7

How many different components make up a nucleoside?

Accepted Answer

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

Question 8

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 9

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 10

Where on the chromosomes are satellites found?

Accepted Answer

A)  at center and the 5' end 
B)  only at the ends 
C)  only at the center 
D)  at both the center and the ends 
A)  at center and the 5' end 
B)  only at the ends 
C)  only at the center 
D)  at both the center and the ends

Question 11

Which of the following occurs when DNA is transcribed to mRNA?

Accepted Answer

A)  Both the exons and introns are transcribed in sequence. 
B)  Both the exons and introns are transcribed, but their sequence is changed. 
C)  Only the exons are transcribed. 
D)  Only the intros are transcribed. 
A)  Both the exons and introns are transcribed in sequence. 
B)  Both the exons and introns are transcribed, but their sequence is changed. 
C)  Only the exons are transcribed. 
D)  Only the intros are transcribed.

Question 12

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

Question 13

Which type of enzyme is important in DNA fingerprinting?

Accepted Answer

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

Question 14

Which of the following discovered the polymerase chain reaction (PCR)?

Accepted Answer

A)  C. Anfinsen 
B)  B. Blumberg 
C)  K. Mullis 
D)  L. Pauling 
A)  C. Anfinsen 
B)  B. Blumberg 
C)  K. Mullis 
D)  L. Pauling

Question 15

How many origins of replication are found on a typical human chromosome?

Accepted Answer

A)  1 
B)  about 100 
C)  several hundred 
D)  several thousand 
A)  1 
B)  about 100 
C)  several hundred 
D)  several thousand

Question 16

mRNA does which of the following?

Accepted Answer

A)  bring genetic information from the cytoplasm to the nucleus 
B)  bring genetic information from the nucleus to the cytoplasm 
C)  transport amino acids to the ribosome 
D)  none of the above 
A)  bring genetic information from the cytoplasm to the nucleus 
B)  bring genetic information from the nucleus to the cytoplasm 
C)  transport amino acids to the ribosome 
D)  none of the above

Question 17

Approximately how many base pairs must be duplicated at each cell cycle?

Accepted Answer

A)  3 × 106 
B)  3 × 109 
C)  3 × 1012 
D)  3 × 1015 
A)  3 × 106 
B)  3 × 109 
C)  3 × 1012 
D)  3 × 1015

Question 18

Which of the following is true of splicing?

Accepted Answer

A)  It involves both the snRNA and protein portions of a snRNP. 
B)  It involves only the protein portion of a snRNP. 
C)  It involves only the snRNA portion of a snRNP. 
D)  snRNPs are not involved in splicing. 
A)  It involves both the snRNA and protein portions of a snRNP. 
B)  It involves only the protein portion of a snRNP. 
C)  It involves only the snRNA portion of a snRNP. 
D)  snRNPs are not involved in splicing.

Question 19

Which of the following diseases is associated with xeroderma pigmentosa?

Accepted Answer

A)  breast cancer 
B)  liver cancer 
C)  pancreatic cancer 
D)  skin cancer 
A)  breast cancer 
B)  liver cancer 
C)  pancreatic cancer 
D)  skin cancer

Question 20

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

Exam 25: Nucleotides, Nucleic Acids, and Heredity

In eukaryotic cells where is DNA found?

Approximately what percentage of human DNA codes for proteins?

Transcription corresponds to which of the following?

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

Which of the following best characterizes the function of introns?

Primers are periodically placed in which of the following?

How many different components make up a nucleoside?

Which of the following statements is correct?

Hybridization in PCR involves which of the following?

Where on the chromosomes are satellites found?

Which of the following occurs when DNA is transcribed to mRNA?

How many nucleosomes form the repeating unit of chromatin?

Which type of enzyme is important in DNA fingerprinting?

Which of the following discovered the polymerase chain reaction (PCR)?

How many origins of replication are found on a typical human chromosome?

mRNA does which of the following?

Approximately how many base pairs must be duplicated at each cell cycle?

Which of the following is true of splicing?

Which of the following diseases is associated with xeroderma pigmentosa?

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

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 and Alkynes

Benzene and Its Derivatives

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