Question 1

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

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 2

Which of the following is a monomer of protein?

Accepted Answer

A)  nucleotide 
B)  monosaccharide 
C)  simple sugar 
D)  amino acid 
E)  ribose 
A)  nucleotide 
B)  monosaccharide 
C)  simple sugar 
D)  amino acid 
E)  ribose

Question 3

Which of the following compounds helps to maintain our blood pH between 7.35 and 7.45?

Accepted Answer

A)  water 
B)  carbonic acid 
C)  hydrocloric acid 
D)  hydrogen peroxide 
E)  sodium hydroxide 
A)  water 
B)  carbonic acid 
C)  hydrocloric acid 
D)  hydrogen peroxide 
E)  sodium hydroxide

Question 4

Classification.The following are basic building blocks of macromolecules.Answer the questions with reference to those building blocks.
-the monomeric unit of a polypeptide chain

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 5

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

Accepted Answer

A)  5 
B)  7 
C)  10 
D)  15 
E)  30 
A)  5 
B)  7 
C)  10 
D)  15 
E)  30

Question 6

____ bonds hold molecules of water together.

Accepted Answer

A)  Hydrogen 
B)  Ionic 
C)  Covalent 
D)  Inert 
E)  Single 
A)  Hydrogen 
B)  Ionic 
C)  Covalent 
D)  Inert 
E)  Single

Question 7

Classification.The following are types of chemical bonds.Answer the questions with reference to those chemical bonds.
-the bond that breaks when salts dissolve in water

Accepted Answer

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

Question 8

Cell membranes are characterized by the presence of

Accepted Answer

A)  triglycerides. 
B)  phospholipids. 
C)  unsaturated fats. 
D)  steroids. 
E)  saturated fats. 
A)  triglycerides. 
B)  phospholipids. 
C)  unsaturated fats. 
D)  steroids. 
E)  saturated fats.

Question 9

Match the following numbers with the number of electrons in the stated energy level.
-number of electrons in the third 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 10

In ____ bonds,atoms share electrons equally.

Accepted Answer

A)  double covalent 
B)  unstable covalent 
C)  polar covalent 
D)  nonpolar covalent 
E)  triple covalent 
A)  double covalent 
B)  unstable covalent 
C)  polar covalent 
D)  nonpolar covalent 
E)  triple covalent

Question 11

What two atoms are found in all organic compounds?

Accepted Answer

A)  carbon and hydrogen 
B)  carbon and oxygen 
C)  oxygen and hydrogen 
D)  carbon and phosphorous 
E)  oxygen and sulfur 
A)  carbon and hydrogen 
B)  carbon and oxygen 
C)  oxygen and hydrogen 
D)  carbon and phosphorous 
E)  oxygen and sulfur

Question 12

Which of the following molecules is NOT a steroid?

Accepted Answer

A)  testosterone 
B)  estrogen 
C)  glycerol 
D)  cholesterol 
E)  vitamin D 
A)  testosterone 
B)  estrogen 
C)  glycerol 
D)  cholesterol 
E)  vitamin D

Question 13

A mix of glucose and water is called a

Accepted Answer

A)  compound. 
B)  suspension. 
C)  solvent. 
D)  solute. 
E)  solution. 
A)  compound. 
B)  suspension. 
C)  solvent. 
D)  solute. 
E)  solution.

Question 14

Match the following letters to the number with which they best correspond.
-number of protons in the atomic nucleus.

Accepted Answer

A) Mass number 
B) Atomic number 
C) Radioisotope 
D) Isotopes 
E) Ions 
A) Mass number 
B) Atomic number 
C) Radioisotope 
D) Isotopes 
E) Ions

Question 15

Match the following letters to the number with which they best correspond.
-substance that releases hydrogen ions in solution

Accepted Answer

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

Question 16

Which of the following parameters could affect the shape of a protein?

Accepted Answer

A)  heat 
B)  low pH 
C)  detergents 
D)  high pH 
E)  all of these 
A)  heat 
B)  low pH 
C)  detergents 
D)  high pH 
E)  all of these

Question 17

Nucleotides are monomers of

Accepted Answer

A)  complex lipids. 
B)  proteins. 
C)  polysaccharides. 
D)  nucleic acids. 
E)  all of these. 
A)  complex lipids. 
B)  proteins. 
C)  polysaccharides. 
D)  nucleic acids. 
E)  all of these.

Question 18

Glycogen is a polysaccharide used for energy storage by

Accepted Answer

A)  plants. 
B)  animals. 
C)  protists. 
D)  bacteria. 
E)  archaea. 
A)  plants. 
B)  animals. 
C)  protists. 
D)  bacteria. 
E)  archaea.

Question 19

Secondary protein structure is dependent on

Accepted Answer

A)  hydrophobic interactions. 
B)  hydrogen bonds between two amino acids. 
C)  covalent linkages between carbons and nitrogens of adjacent amino acids. 
D)  covalent linkages between carbons and oxygens of adjacent amino acids. 
E)  all of these. 
A)  hydrophobic interactions. 
B)  hydrogen bonds between two amino acids. 
C)  covalent linkages between carbons and nitrogens of adjacent amino acids. 
D)  covalent linkages between carbons and oxygens of adjacent amino acids. 
E)  all of these.

Exam 2: Molecules of Life

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

Which of the following is a monomer of protein?

Which of the following compounds helps to maintain our blood pH between 7.35 and 7.45?

Classification.The following are basic building blocks of macromolecules.Answer the questions with reference to those building blocks. -the monomeric unit of a polypeptide chain

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

____ bonds hold molecules of water together.

Classification.The following are types of chemical bonds.Answer the questions with reference to those chemical bonds. -the bond that breaks when salts dissolve in water

Cell membranes are characterized by the presence of

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

In ____ bonds,atoms share electrons equally.

What two atoms are found in all organic compounds?

Which of the following molecules is NOT a steroid?

A mix of glucose and water is called a

Match the following letters to the number with which they best correspond. -number of protons in the atomic nucleus.

Match the following letters to the number with which they best correspond. -substance that releases hydrogen ions in solution

Which of the following parameters could affect the shape of a protein?

Nucleotides are monomers of

Glycogen is a polysaccharide used for energy storage by

Secondary protein structure is dependent on

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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