Question 1

Which of the following pHs has the highest concentration of hydrogen ions?

Accepted Answer

A)  1 
B)  3 
C)  5 
D)  7 
E)  9 
A)  1 
B)  3 
C)  5 
D)  7 
E)  9

Question 2

Match the following numbers with the number of electrons in the stated energy level.
-number of electrons in the second energy level

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 5 
E) 8 
A) 1 
B) 2 
C) 3 
D) 5 
E) 8

Question 3

Which of the following statements is INCORRECT?

Accepted Answer

A)  Acids release hydrogen ions. 
B)  In a neutral solution, the amount of hydrogen and hydroxyl ions are equal. 
C)  Hydrogen bonding between water molecules gives water its temperature-stabilizing and cohesive properties. 
D)  Salts precipitate out of solution and have no function in cells. 
E)  Polar water molecules are attracted to water. 
A)  Acids release hydrogen ions. 
B)  In a neutral solution, the amount of hydrogen and hydroxyl ions are equal. 
C)  Hydrogen bonding between water molecules gives water its temperature-stabilizing and cohesive properties. 
D)  Salts precipitate out of solution and have no function in cells. 
E)  Polar water molecules are attracted to water.

Question 4

Which of the following is NOT a disease associated with excess consumption of trans fats?

Accepted Answer

A)  atherosclerosis 
B)  heart attack 
C)  diabetes 
D)  arthritis 
E)  all of these are diseases associated with consumption of trans fats 
A)  atherosclerosis 
B)  heart attack 
C)  diabetes 
D)  arthritis 
E)  all of these are diseases associated with consumption of trans fats

Question 5

Which of the following bonds is weakest?

Accepted Answer

A)  between two oxygen atoms within molecular oxygen 
B)  between the opposite ions, sodium and chloride 
C)  between the oxygen and hydrogens within a water molecule 
D)  between two water molecules 
E)  between the hydrogens within molecular hydrogen 
A)  between two oxygen atoms within molecular oxygen 
B)  between the opposite ions, sodium and chloride 
C)  between the oxygen and hydrogens within a water molecule 
D)  between two water molecules 
E)  between the hydrogens within molecular hydrogen

Question 6

Match the following letters to the number with which they best correspond.
-measure of the concentration of hydrogen ions in a solution

Accepted Answer

A) Acid 
B) Base 
C) Neutral 
D) Buffer 
E) pH 
A) Acid 
B) Base 
C) Neutral 
D) Buffer 
E) pH

Question 7

The bond in table salt (NaCl)is

Accepted Answer

A)  polar. 
B)  ionic. 
C)  covalent. 
D)  double. 
E)  nonpolar. 
A)  polar. 
B)  ionic. 
C)  covalent. 
D)  double. 
E)  nonpolar.

Question 8

What guides the production of a multi-celled organism?

Accepted Answer

A)  the sequence of nucleotide bases in DNA 
B)  the sequence of amino acids in a protein 
C)  the sequence of fatty acids in a triglyceride 
D)  the sequence of nucleotides in RNA 
E)  the sequence of monosaccharides in a polysaccharide 
A)  the sequence of nucleotide bases in DNA 
B)  the sequence of amino acids in a protein 
C)  the sequence of fatty acids in a triglyceride 
D)  the sequence of nucleotides in RNA 
E)  the sequence of monosaccharides in a polysaccharide

Question 9

Classification.The following are basic building blocks of macromolecules.Answer the questions with reference to those building blocks.
-the basic unit of deoxyribonucleic acid

Accepted Answer

A) amino acids 
B) glucose 
C) glycerol 
D) fatty acids 
E) nucleotide
F)amino acids and glucose
G)amino acids and glycerol
H)glucose and glycerol
I)glucose and fatty acids
J)glycerol and fatty acids 
A) amino acids 
B) glucose 
C) glycerol 
D) fatty acids 
E) nucleotide
F)amino acids and glucose
G)amino acids and glycerol
H)glucose and glycerol
I)glucose and fatty acids
J)glycerol and fatty acids

Question 10

What accounts for carbon's importance to life?

Accepted Answer

A)  its ability to form rings 
B)  its nonpolarity 
C)  its versatile bonding behavior 
D)  its ability to form rings. 
E)  its large size 
A)  its ability to form rings 
B)  its nonpolarity 
C)  its versatile bonding behavior 
D)  its ability to form rings. 
E)  its large size

Question 11

Proteins function as all of the following,except one.Select the exception.

Accepted Answer

A)  structural units. 
B)  hormones. 
C)  defense molecules. 
D)  enzymes. 
E)  energy storage. 
A)  structural units. 
B)  hormones. 
C)  defense molecules. 
D)  enzymes. 
E)  energy storage.

Question 12

Phosphorus
Consider the element phosphorus,which has an atomic mass of 30,and answer the following question(s).
-How many electrons are in the innermost electron shell of a phosphorus atom?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  5 
E)  8 
A)  1 
B)  2 
C)  3 
D)  5 
E)  8

Question 13

Which of the following sugars is found in RNA and NOT in DNA?

Accepted Answer

A)  glucose 
B)  deoxyribose 
C)  deoxyribulose 
D)  ribose 
E)  ribulose 
A)  glucose 
B)  deoxyribose 
C)  deoxyribulose 
D)  ribose 
E)  ribulose

Question 14

When a protein denatures,what type of bonding is affected?

Accepted Answer

A)  covalent 
B)  peptide 
C)  ionic 
D)  hydrogen 
E)  metallic 
A)  covalent 
B)  peptide 
C)  ionic 
D)  hydrogen 
E)  metallic

Question 15

Which of the following is a monomer of carbohydrates?

Accepted Answer

A)  triglyceride 
B)  fatty acids 
C)  nucleotide 
D)  amino acid 
E)  monosaccharide 
A)  triglyceride 
B)  fatty acids 
C)  nucleotide 
D)  amino acid 
E)  monosaccharide

Question 16

Which of the following is NOT a functional occupation of nucleotides?

Accepted Answer

A)  virus destroyers 
B)  energy carriers 
C)  enzyme helpers 
D)  chemical messengers 
E)  subunits of larger molecules 
A)  virus destroyers 
B)  energy carriers 
C)  enzyme helpers 
D)  chemical messengers 
E)  subunits of larger molecules

Question 17

The negative subatomic particle is

Accepted Answer

A)  the neutron. 
B)  the proton. 
C)  the electron. 
D)  both the electron and the proton. 
E)  both the proton and the electron. 
A)  the neutron. 
B)  the proton. 
C)  the electron. 
D)  both the electron and the proton. 
E)  both the proton and the electron.

Question 18

Classification.The following are types of chemical bonds.Answer the questions with reference to those chemical bonds.
-the bond between the two strands of DNA in a double helix

Accepted Answer

A) hydrogen 
B) ionic 
C) covalent 
A) hydrogen 
B) ionic 
C) covalent

Question 19

What are the properties that favor trans fat over other types of fats?

Accepted Answer

A)  I and II 
B)  I, II, and III 
C)  I, II, III, and IV 
D)  II and III 
E)  II only 
A)  I and II 
B)  I, II, and III 
C)  I, II, III, and IV 
D)  II and III 
E)  II only

Question 20

Phosphorus
Consider the element phosphorus,which has an atomic mass of 30,and answer the following question(s).
-Boron has an atomic number of 5.How many vacancies does boron have in its outer shell?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Exam 2: Molecules of Life

Which of the following pHs has the highest concentration of hydrogen ions?

Match the following numbers with the number of electrons in the stated energy level. -number of electrons in the second energy level

Which of the following statements is INCORRECT?

Which of the following is NOT a disease associated with excess consumption of trans fats?

Which of the following bonds is weakest?

Match the following letters to the number with which they best correspond. -measure of the concentration of hydrogen ions in a solution

The bond in table salt (NaCl)is

What guides the production of a multi-celled organism?

Classification.The following are basic building blocks of macromolecules.Answer the questions with reference to those building blocks. -the basic unit of deoxyribonucleic acid

What accounts for carbon's importance to life?

Proteins function as all of the following,except one.Select the exception.

Phosphorus Consider the element phosphorus,which has an atomic mass of 30,and answer the following question(s). -How many electrons are in the innermost electron shell of a phosphorus atom?

Which of the following sugars is found in RNA and NOT in DNA?

When a protein denatures,what type of bonding is affected?

Which of the following is a monomer of carbohydrates?

Which of the following is NOT a functional occupation of nucleotides?

The negative subatomic particle is

Classification.The following are types of chemical bonds.Answer the questions with reference to those chemical bonds. -the bond between the two strands of DNA in a double helix

What are the properties that favor trans fat over other types of fats?

Phosphorus Consider the element phosphorus,which has an atomic mass of 30,and answer the following question(s). -Boron has an atomic number of 5.How many vacancies does boron have in its outer shell?

Invitation to Biology

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

DNA Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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