Question 1

A hydrogen bond is

Accepted Answer

A)  a sharing of a pair of electrons between a hydrogen and an oxygen nucleus. 
B)  a sharing of a pair of electrons between a hydrogen nucleus and either an oxygen or a nitrogen nucleus. 
C)  an attractive force that involves a hydrogen atom and an oxygen or a nitrogen atom that are either in two different molecules or within the same molecule. 
D)  none of these. 
E)  all of these. 
A)  a sharing of a pair of electrons between a hydrogen and an oxygen nucleus. 
B)  a sharing of a pair of electrons between a hydrogen nucleus and either an oxygen or a nitrogen nucleus. 
C)  an attractive force that involves a hydrogen atom and an oxygen or a nitrogen atom that are either in two different molecules or within the same molecule. 
D)  none of these. 
E)  all of these.

Question 2

Which of the following statements is INCORRECT about trans fats?

Accepted Answer

A)  Trans fats decrease the level of cholesterol in the blood. 
B)  Trans fats increase the risks of atherosclerosis. 
C)  Trans fats increase the risks of diabetes. 
D)  Trans fats increase the risks of heart attack. 
E)  Trans fats alter the function of arteries and veins. 
A)  Trans fats decrease the level of cholesterol in the blood. 
B)  Trans fats increase the risks of atherosclerosis. 
C)  Trans fats increase the risks of diabetes. 
D)  Trans fats increase the risks of heart attack. 
E)  Trans fats alter the function of arteries and veins.

Question 3

Which types of bonds are possible between a hydrogen atom and another atom within the same molecule?

Accepted Answer

A)  hydrogen only 
B)  single bonds only 
C)  single bonds and double bonds 
D)  single, double, and triple bonds 
E)  single, double, triple, and hydrogen bonds 
A)  hydrogen only 
B)  single bonds only 
C)  single bonds and double bonds 
D)  single, double, and triple bonds 
E)  single, double, triple, and hydrogen bonds

Question 4

Which compound is NOT soluble in water?

Accepted Answer

A)  olive oil 
B)  table salt 
C)  sugar 
D)  albumin 
E)  sucrose 
A)  olive oil 
B)  table salt 
C)  sugar 
D)  albumin 
E)  sucrose

Question 5

The amount of energy necessary for an electron to jump to its next level

Accepted Answer

A)  varies depending on the atom. 
B)  is exactly equal to what it needs. 
C)  is always in excess of the needed amount. 
D)  is exactly twice the energy emitted when the electron loses energy. 
E)  is less than the energy emitted when the electron loses energy. 
A)  varies depending on the atom. 
B)  is exactly equal to what it needs. 
C)  is always in excess of the needed amount. 
D)  is exactly twice the energy emitted when the electron loses energy. 
E)  is less than the energy emitted when the electron loses energy.

Question 6

A hydrogen atom that has become an ion is

Accepted Answer

A)  a negatively charged ion. 
B)  an isotope. 
C)  unstable. 
D)  a proton. 
E)  an electron. 
A)  a negatively charged ion. 
B)  an isotope. 
C)  unstable. 
D)  a proton. 
E)  an electron.

Question 7

Which of the following is NOT a characteristic of prions or prion diseases?

Accepted Answer

A)  the protein that becomes a prion is common throughout the body 
B)  they are misfolded proteins 
C)  they form fibers that accumulate in the brain 
D)  they result in tiny holes in the brain 
E)  prion diseases are non-fatal 
A)  the protein that becomes a prion is common throughout the body 
B)  they are misfolded proteins 
C)  they form fibers that accumulate in the brain 
D)  they result in tiny holes in the brain 
E)  prion diseases are non-fatal

Question 8

Nucleotides contain what kind of sugars?

Accepted Answer

A)  three-carbon 
B)  four-carbon 
C)  five-carbon 
D)  six-carbon 
E)  seven-carbon 
A)  three-carbon 
B)  four-carbon 
C)  five-carbon 
D)  six-carbon 
E)  seven-carbon

Question 9

A fat molecule has ____ fatty acids.

Accepted Answer

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

Question 10

Match the following letters to the number with which they best correspond.
-solution that contains the same concentration of H? ions as OH? ions

Accepted Answer

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

Question 11

Methane gas (CH?)is an example of a molecule containing which type of chemical bonds?

Accepted Answer

A)  hydrogen bonds 
B)  double bonds 
C)  ionic bonds 
D)  polar covalent bonds 
E)  nonpolar covalent bonds 
A)  hydrogen bonds 
B)  double bonds 
C)  ionic bonds 
D)  polar covalent bonds 
E)  nonpolar covalent bonds

Question 12

Two amino acids are bonded together to form a dipeptide by what type of reaction?

Accepted Answer

A)  condensation 
B)  oxidation reduction 
C)  hydrolysis 
D)  decomposition 
E)  acid-base 
A)  condensation 
B)  oxidation reduction 
C)  hydrolysis 
D)  decomposition 
E)  acid-base

Question 13

Unsaturated fats

Accepted Answer

A)  are solid at room temperature 
B)  have at least one double bond in their fatty acid tail 
C)  are saturated with hydrogens 
D)  mainly come from animals. 
E)  consist of straight chain fatty acids. 
A)  are solid at room temperature 
B)  have at least one double bond in their fatty acid tail 
C)  are saturated with hydrogens 
D)  mainly come from animals. 
E)  consist of straight chain fatty acids.

Question 14

Radioactive isotopes have

Accepted Answer

A)  excess electrons. 
B)  excess protons. 
C)  excess neutrons. 
D)  insufficient neutrons. 
E)  insufficient protons. 
A)  excess electrons. 
B)  excess protons. 
C)  excess neutrons. 
D)  insufficient neutrons. 
E)  insufficient protons.

Question 15

All steroids have

Accepted Answer

A)  the same number of double bounds. 
B)  double bonds in the same positions. 
C)  four carbon rings. 
D)  the same functional groups. 
E)  the same number and positions of double bonds. 
A)  the same number of double bounds. 
B)  double bonds in the same positions. 
C)  four carbon rings. 
D)  the same functional groups. 
E)  the same number and positions of double bonds.

Question 16

Sucrose is composed of

Accepted Answer

A)  two molecules of fructose. 
B)  two molecules of glucose. 
C)  a molecule of fructose and a molecule of glucose. 
D)  a molecule of fructose and a molecule of galactose. 
E)  two molecules of galactose. 
A)  two molecules of fructose. 
B)  two molecules of glucose. 
C)  a molecule of fructose and a molecule of glucose. 
D)  a molecule of fructose and a molecule of galactose. 
E)  two molecules of galactose.

Question 17

Mad cow disease is caused by

Accepted Answer

A)  viruses. 
B)  proteins. 
C)  infectious bacteria. 
D)  parasites. 
E)  fungi. 
A)  viruses. 
B)  proteins. 
C)  infectious bacteria. 
D)  parasites. 
E)  fungi.

Question 18

Oils are

Accepted Answer

A)  liquid at room temperature. 
B)  unsaturated fats. 
C)  found only in animals. 
D)  complex carbohydrates. 
E)  both liquid at room temperature and unsaturated fats. 
A)  liquid at room temperature. 
B)  unsaturated fats. 
C)  found only in animals. 
D)  complex carbohydrates. 
E)  both liquid at room temperature and unsaturated fats.

Question 19

Classification.The following are types of chemical bonds.Answer the questions with reference to those chemical bonds.
-the bond between the NaCl

Accepted Answer

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

Question 20

Primary 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

A hydrogen bond is

Which of the following statements is INCORRECT about trans fats?

Which types of bonds are possible between a hydrogen atom and another atom within the same molecule?

Which compound is NOT soluble in water?

The amount of energy necessary for an electron to jump to its next level

A hydrogen atom that has become an ion is

Which of the following is NOT a characteristic of prions or prion diseases?

Nucleotides contain what kind of sugars?

A fat molecule has ____ fatty acids.

Match the following letters to the number with which they best correspond. -solution that contains the same concentration of H? ions as OH? ions

Methane gas (CH?)is an example of a molecule containing which type of chemical bonds?

Two amino acids are bonded together to form a dipeptide by what type of reaction?

Unsaturated fats

Radioactive isotopes have

All steroids have

Sucrose is composed of

Mad cow disease is caused by

Oils are

Classification.The following are types of chemical bonds.Answer the questions with reference to those chemical bonds. -the bond between the NaCl

Primary 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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