Question 1

DNA and RNA differ in strandedness,type of sugar,and types of nitrogenous bases.

Accepted Answer

A) True 
 B)False

Question 2

Synthesis of a protein stops when

Accepted Answer

A)  any of three specific anticodons are encountered in the mRNA.
B)  there is no more DNA.
C)  any of three "stop" codons are encountered in the mRNA.
D)  the ribosome becomes fatigueD.E) A) and D)
F) A) and B)

Question 3

Which of the following is not true regarding RNA?

Accepted Answer

A)  It is transcribed in the nucleus and enters the cytoplasm.
B)  It includes ribose,a 5-carbon sugar.
C)  It is double-stranded.
D)  It has cytosine as one of its four nitrogenous bases.E) C) and D)
F) None of the above

Question 4

Which of the following substances increases in abundance during cellular respiration?

Accepted Answer

A)  Oxygen
B)  Glucose
C)  ATP
D)  GlycogenE) A) and B)
F) A) and C)

Question 5

The genetic code is the correspondence between DNA sequence and amino acid sequence of a protein.

Accepted Answer

A) True 
 B)False

Question 6

A mutation may occur spontaneously or by exposure to a mutagen.

Accepted Answer

A) True 
 B)False

Question 7

A cell may contain hundreds of different types of enzymes.

Accepted Answer

A) True 
 B)False

Question 8

The synthesis of an ATP molecule requires two ADP molecules.

Accepted Answer

A) True 
 B)False

Question 9

A DNA sequence of CGCTTACGATTG would be transcribed into an RNA sequence of GCGAAUGCUAAC.

Accepted Answer

A) True 
 B)False

Question 10

The two strands of a DNA molecule have opposite orientation.

Accepted Answer

A) True 
 B)False

Question 11

Three factors that increase the rates of enzyme-controlled reactions are the

Accepted Answer

A)  number of enzyme molecules,number of substrate molecules,and efficiency of the enzyme.
B)  temperature of the reaction,number of H2O molecules,and bond strength.
C)  number of enzyme and substrate molecules formed and strength of the enzyme.
D)  size of the enzyme compared to the substrate,the number of active sites,and the ratio of enzyme to substrate molecules.E) None of the above
F) A) and C)

Question 12

In dehydration synthesis of a carbohydrate,

Accepted Answer

A)  larger molecules are decomposed into smaller ones.
B)  monosaccharides are joined.
C)  water molecules bond to monosaccharide molecules.
D)  the molecule is decomposed into carbon dioxide and water.E) C) and D)
F) B) and C)

Question 13

How many codons specify the twenty types of amino acids?

Accepted Answer

A)  61
B)  23
C)  46
D)  3E) C) and D)
F) All of the above

Question 14

A __________ RNA binds an amino acid.

Accepted Answer

The answer of A __________ RNA binds an amino acid....

Question 15

Which of the nitrogenous bases is part of DNA but not RNA?

Accepted Answer

A)  Uracil
B)  Thymine
C)  Guanine
D)  CytosineE) A) and B)
F) A) and D)

Question 16

DNA transcribed to mRNA always begins with the sequence

Accepted Answer

A)  TAC.
B)  AGG.
C)  AUG.
D)  TTA.E) B) and C)
F) B) and D)

Question 17

In adipose tissue,fat molecules form when fatty acid molecules and glycerol join by hydrolysis.

Accepted Answer

A) True 
 B)False

Question 18

An active site of an enzyme is

Accepted Answer

A)  the part of the enzyme that binds ATP.
B)  a sequence of DNA nucleotides that encodes a protein molecule.
C)  the part of a substrate that combines with an enzyme.
D)  the part of an enzyme that combines with a substrate.E) A) and C)
F) All of the above

Question 19

In cellular respiration,

Accepted Answer

A)  mitochondria release glucose molecules.
B)  energy is released from molecules and is transferred to other molecules.
C)  cells breathe,or take in,O2 and give off CO2.
D)  energy is absorbed from glucose and is transferred to CO2.E) All of the above
F) A) and B)

Question 20

The DNA damage response replaces mismatched nucleotides.

Accepted Answer

A) True 
 B)False

Exam 4: Cellular Metabolism

Which of the following is not true regarding RNA?

Correct AnswerverifiedShow Answer

A __________ RNA binds an amino acid.

Correct AnswerverifiedShow Answer

The synthesis of an ATP molecule requires two ADP molecules.

Correct AnswerverifiedShow Answer

The genetic code is the correspondence between DNA sequence and amino acid sequence of a protein.

Correct AnswerverifiedShow Answer

The DNA damage response replaces mismatched nucleotides.

Correct AnswerverifiedShow Answer

In adipose tissue,fat molecules form when fatty acid molecules and glycerol join by hydrolysis.

Correct AnswerverifiedShow Answer

A DNA sequence of CGCTTACGATTG would be transcribed into an RNA sequence of GCGAAUGCUAAC.

Correct AnswerverifiedShow Answer

A mutation may occur spontaneously or by exposure to a mutagen.

Correct AnswerverifiedShow Answer

Which of the following substances increases in abundance during cellular respiration?

Correct AnswerverifiedShow Answer

The two strands of a DNA molecule have opposite orientation.

Correct AnswerverifiedShow Answer

Synthesis of a protein stops when

Correct AnswerverifiedShow Answer

An active site of an enzyme is

Correct AnswerverifiedShow Answer

DNA and RNA differ in strandedness,type of sugar,and types of nitrogenous bases.

Correct AnswerverifiedShow Answer

How many codons specify the twenty types of amino acids?

Correct AnswerverifiedShow Answer

In dehydration synthesis of a carbohydrate,

Correct AnswerverifiedShow Answer

In cellular respiration,

Correct AnswerverifiedShow Answer

Three factors that increase the rates of enzyme-controlled reactions are the

Correct AnswerverifiedShow Answer

Which of the nitrogenous bases is part of DNA but not RNA?

Correct AnswerverifiedShow Answer

DNA transcribed to mRNA always begins with the sequence

Correct AnswerverifiedShow Answer

A cell may contain hundreds of different types of enzymes.

Correct AnswerverifiedShow Answer

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