Question 1

If the DNA triplet ACA mutates to GCA, then the encoded amino acid changes from _____ to _____.

Accepted Answer

The answer of If the DNA triplet ACA mutates to...

Question 2

A DNA sequence AACGGTGCACCACGG encodes an mRNA of sequence

Accepted Answer

A)   AACGGUGCACCACGG.
B)   UUGCCACGUGGUGCC.
C)   AACGGTGCACCACGG.
D)   UUCGGAGCUCCUCGG.E) C) and D)
F) A) and B)

Question 3

For each acetyl CoA molecule that enters the citric acid cycle, 2 ATPs, 16 H atoms, and 4 CO2 molecules are produced.

Accepted Answer

A) True 
 B)False

Question 4

The electron transport chain is a series of enzyme complexes that pass electrons, releasing energy that is used to phosphorylate ADP to ATP on the inner mitochondrial membrane.

Accepted Answer

A) True 
 B)False

Question 5

A rate-limiting enzyme usually acts at the end of a metabolic pathway.

Accepted Answer

A) True 
 B)False

Question 6

An example of an anabolic reaction is

Accepted Answer

A)   many monosaccharides bonding, forming glycogen.
B)   a dipeptide breaking down into two amino acids.
C)   glycerol reacting with 3 fatty acid molecules to yield water and proteins.
D)   glycogen breaking down into many monosaccharides.E) B) and C)
F) A) and B)

Question 7

A metabolic pathway is a particular sequence of enzyme-controlled reactions.

Accepted Answer

A) True 
 B)False

Question 8

A DNA strand of ACTTCGCATG, when replicated, would yield a strand of the same sequence.

Accepted Answer

A) True 
 B)False

Question 9

The anaerobic reactions of cellular respiration occur in the _____, whereas the aerobic reactions of cellular respiration occur in the ______.

Accepted Answer

A)   mitochondria with O2 required; cytoplasm with O2 required
B)   cytoplasm without O2 required; cytoplasm with CO2 required
C)   mitochondria without O2 required; mitochondria with O2 required
D)   cytoplasm without O2 required; mitochondria with O2 requiredE) A) and B)
F) None of the above

Question 10

Proteins are critical to metabolism because all proteins are enzymes.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is an example of catabolism?

Accepted Answer

A)   The assembly of the cell membrane from precursor molecules
B)   The increase in muscle tissue with exercise
C)   The formation of secretory proteins in the pancreas
D)   The breakdown of glucose in the cytoplasm and mitochondriaE) All of the above
F) None of the above

Question 12

Dehydration synthesis reactions _____, whereas hydrolysis reactions _____.

Accepted Answer

A)   lose  H2O \mathrm{H}_{2} \mathrm{O} H2​O  to break bonds; use  H2O \mathrm{H}_{2} \mathrm{O} H2​O  to form bonds
B)   break large molecules into smaller ones; build large molecules from smaller ones 
C)   use  H2O \mathrm{H}_{2} \mathrm{O} H2​O  to form bonds; lose  H2O \mathrm{H}_{2} \mathrm{O} H2​O  to break bonds
D)   lose  H2O \mathrm{H}_{2} \mathrm{O} H2​O  to form bonds; use  H2O \mathrm{H}_{2} \mathrm{O} H2​O  to break bonds E) B) and D)
F) All of the above

Question 13

A glucose molecule is broken down into two pyruvic acid molecules in

Accepted Answer

A)   glycolysis.
B)   the citric acid cycle.
C)   gluconeogenesis.
D)   the electron transport system.E) C) and D)
F) All of the above

Question 14

A mutation that changes a CGC codon to CGA would not affect health because the encoded amino acid is unchanged.

Accepted Answer

A) True 
 B)False

Question 15

One reason protein synthesis is important is that

Accepted Answer

A)   enzymes are proteins and enzymes are essential to metabolism.
B)   proteins release energy for metabolic reactions.
C)   proteins encode DNA sequences.
D)   the diet does not provide the building blocks of protein.E) B) and D)
F) C) and D)

Question 16

A example of genetic change is the presence of certain DNA sequences in different numbers of copies in different individuals.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is true?

Accepted Answer

A)   The genome consists of entirely protein-encoding genes.
B)   An amino acid encodes a gene.
C)   DNA has five types of nucleotide bases.
D)   Much of the genome does not encode proteins.E) C) and D)
F) All of the above

Question 18

Copying DNA information into an mRNA molecule is called

Accepted Answer

A)   translation.
B)   synthesis.
C)   replication.
D)   transcription.E) A) and D)
F) All of the above

Question 19

If one strand of DNA has the sequence TCAGGCTATTCCCG, then the complementary sequence of the other strand is

Accepted Answer

A)   AGUCCGAUAAGGGC.
B)   AGTCCGATAAGGGC.
C)   TCAGGCTATTCCCG.
D)   UCAGGCUAUUCCCG.E) A) and B)
F) A) and C)

Question 20

Adenine and guanine are ________ and cytosine and thymine are ______.
or
or
or

Accepted Answer

purines; pyrimidines...

Exam 4: Cellular Metabolism

An example of an anabolic reaction is

Correct AnswerverifiedShow Answer

If one strand of DNA has the sequence TCAGGCTATTCCCG, then the complementary sequence of the other strand is

Correct AnswerverifiedShow Answer

The electron transport chain is a series of enzyme complexes that pass electrons, releasing energy that is used to phosphorylate ADP to ATP on the inner mitochondrial membrane.

Correct AnswerverifiedShow Answer

For each acetyl CoA molecule that enters the citric acid cycle, 2 ATPs, 16 H atoms, and 4 CO2 molecules are produced.

Correct AnswerverifiedShow Answer

A example of genetic change is the presence of certain DNA sequences in different numbers of copies in different individuals.

Correct AnswerverifiedShow Answer

Adenine and guanine are ________ and cytosine and thymine are ______. or or or

Correct Answerverifiedpurines; pyrimidines...View AnswerShow Answer

A DNA sequence AACGGTGCACCACGG encodes an mRNA of sequence

Correct AnswerverifiedShow Answer

If the DNA triplet ACA mutates to GCA, then the encoded amino acid changes from _____ to _____.

Correct AnswerverifiedShow Answer

Proteins are critical to metabolism because all proteins are enzymes.

Correct AnswerverifiedShow Answer

Dehydration synthesis reactions _____, whereas hydrolysis reactions _____.

Correct AnswerverifiedShow Answer

A glucose molecule is broken down into two pyruvic acid molecules in

Correct AnswerverifiedShow Answer

A DNA strand of ACTTCGCATG, when replicated, would yield a strand of the same sequence.

Correct AnswerverifiedShow Answer

A rate-limiting enzyme usually acts at the end of a metabolic pathway.

Correct AnswerverifiedShow Answer

Copying DNA information into an mRNA molecule is called

Correct AnswerverifiedShow Answer

A metabolic pathway is a particular sequence of enzyme-controlled reactions.

Correct AnswerverifiedShow Answer

Which of the following is an example of catabolism?

Correct AnswerverifiedShow Answer

One reason protein synthesis is important is that

Correct AnswerverifiedShow Answer

A mutation that changes a CGC codon to CGA would not affect health because the encoded amino acid is unchanged.

Correct AnswerverifiedShow Answer

The anaerobic reactions of cellular respiration occur in the _____, whereas the aerobic reactions of cellular respiration occur in the ______.

Correct AnswerverifiedShow Answer

Which of the following is true?

Correct AnswerverifiedShow Answer

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For each acetyl CoA molecule that enters the citric acid cycle, 2 ATPs, 16 H atoms, and 4 CO₂ molecules are produced.

Correct Answer
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Correct Answer
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Adenine and guanine are __ and cytosine and thymine are . or or or

Correct Answer
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purines; pyrimidines...
View Answer

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If the DNA triplet ACA mutates to GCA, then the encoded amino acid changes from _ to _.

Correct Answer
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Correct Answer
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Dehydration synthesis reactions _, whereas hydrolysis reactions _.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The anaerobic reactions of cellular respiration occur in the _, whereas the aerobic reactions of cellular respiration occur in the __.

Correct Answer
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Correct Answer
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