Question 1

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. 
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.

Question 2

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. 
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.

Question 3

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

Accepted Answer

A) Uracil 
B) Thymine 
C) Guanine 
D) Cytosine 
A) Uracil 
B) Thymine 
C) Guanine 
D) Cytosine

Question 4

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

Accepted Answer

A) True 
 B)False

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

Accepted Answer

A) True 
 B)False

Question 7

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. 
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.

Question 8

A __________ RNA binds an amino acid.

Accepted Answer

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

Question 9

The synthesis of an ATP molecule requires two ADP molecules.

Accepted Answer

A) True 
 B)False

Question 10

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

Accepted Answer

A) Oxygen 
B) Glucose 
C) ATP 
D) Glycogen 
A) Oxygen 
B) Glucose 
C) ATP 
D) Glycogen

Question 11

How many codons specify the twenty types of amino acids?

Accepted Answer

A) 61 
B) 23 
C) 46 
D) 3 
A) 61 
B) 23 
C) 46 
D) 3

Question 12

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. 
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.

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

The DNA damage response replaces mismatched nucleotides.

Accepted Answer

A) True 
 B)False

Question 16

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. 
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.

Question 17

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. 
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.

Question 18

A cell may contain hundreds of different types of enzymes.

Accepted Answer

A) True 
 B)False

Question 19

The two strands of a DNA molecule have opposite orientation.

Accepted Answer

A) True 
 B)False

Question 20

DNA transcribed to mRNA always begins with the sequence

Accepted Answer

A) TAC. 
B) AGG. 
C) AUG. 
D) TTA. 
A) TAC. 
B) AGG. 
C) AUG. 
D) TTA.

Exam 4: Cellular Metabolism

Synthesis of a protein stops when

In dehydration synthesis of a carbohydrate,

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

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

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

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

Which of the following is not true regarding RNA?

A __________ RNA binds an amino acid.

The synthesis of an ATP molecule requires two ADP molecules.

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

How many codons specify the twenty types of amino acids?

An active site of an enzyme is

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

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

The DNA damage response replaces mismatched nucleotides.

In cellular respiration,

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

A cell may contain hundreds of different types of enzymes.

The two strands of a DNA molecule have opposite orientation.

DNA transcribed to mRNA always begins with the sequence

Introduction to Human Anatomy and Physiology

Chemical Basis of Life

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Skin and the Integumentary System

Skeletal System

Joints of the Skeletal System

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Nervous System II

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Lymphatic System and Immunity

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Nutrition and Metabolism

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Water, Electrolyte, and Acid-Base Balance

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