Question 1

Which one of the following is TRUE regarding electrons, shells, and energy?

Accepted Answer

A)  Electrons are located in shells around the nucleus. 
B)  Electrons are attracted to each other because they have the same charge. 
C)  In order for an electron to move closer to the nucleus, it must absorb energy. 
D)  The innermost electron shell has the most potential energy. 
E)  As an electron moves to a shell further from the nucleus, it loses energy. 
A)  Electrons are located in shells around the nucleus. 
B)  Electrons are attracted to each other because they have the same charge. 
C)  In order for an electron to move closer to the nucleus, it must absorb energy. 
D)  The innermost electron shell has the most potential energy. 
E)  As an electron moves to a shell further from the nucleus, it loses energy.

Question 2

A diet rich in ________ fat is believed to contribute to the development of cardiovascular disease.

Accepted Answer

The answer of A diet rich in ________ fat is...

Question 3

DNA differs from RNA in that DNA

Accepted Answer

A)  is single stranded 
B)  contains deoxyribose 
C)  is made up of nucleotides 
D)  contains cytosine 
E)  contains phosphates 
A)  is single stranded 
B)  contains deoxyribose 
C)  is made up of nucleotides 
D)  contains cytosine 
E)  contains phosphates

Question 4

Water held behind a dam has a large amount of ________ energy.

Accepted Answer

The answer of Water held behind a dam has a...

Question 5

The molecule that stores the set of instructions of a cell and directs everything a cell does is ________.

Accepted Answer

The answer of The molecule that stores the set of...

Question 6

Which one of the following is needed to synthesize a new strand of DNA?

Accepted Answer

A)  lipids 
B)  glucose 
C)  amino acids 
D)  nucleotides 
E)  ribose 
A)  lipids 
B)  glucose 
C)  amino acids 
D)  nucleotides 
E)  ribose

Question 7

-In order for this atom to be electrically neutral, the number of subatomic particles labeled "A" in the figure would have to equal the number of ________.

Accepted Answer

The answer of  
-In order for this atom to...

Question 8

Which one of the following is a lipid?

Accepted Answer

A)  cholesterol 
B)  alanine 
C)  maltose 
D)  glycogen 
E)  cellulose 
A)  cholesterol 
B)  alanine 
C)  maltose 
D)  glycogen 
E)  cellulose

Question 9

Use the letters from the figure below to answer the following questions.
  
-The number of subatomic particles ________ is the atomic number of that atom.

Accepted Answer

The answer of Use the letters from the figure below...

Question 10

Match between columns
                        Premises: glucose, cellulose, glycogen
attractive forces between atoms in molecules
a component of an atom that carries a positive charge
anything that has mass and occupies space
water, sodium chloride, carbon dioxide
part of an atom that may participate in bonding with another atom
steroids, triglycerides
matter that cannot be broken down
the smallest unit of matter that can take part in a chemical reaction
DNA, RNA
alanine, glycine, cysteine
different forms of the same element that differ in their number of neutrons

Accepted Answer

The Answer of nucleic acids and lipids and proton and is...

Question 11

If your blood pH is lowered significantly, many proteins will not be able to fold correctly. The result will be decreased enzyme function throughout the body.

Accepted Answer

A) True 
 B)False

Question 12

Body fluids in humans have a high buffering capacity because of

Accepted Answer

A)  the presence of the bicarbonate/carbonic acid buffer system 
B)  the natural result of water as a solvent 
C)  hydrogen bonding between water molecules in biological fluids 
D)  shifts in blood pH that are required to maintain homeostasis 
A)  the presence of the bicarbonate/carbonic acid buffer system 
B)  the natural result of water as a solvent 
C)  hydrogen bonding between water molecules in biological fluids 
D)  shifts in blood pH that are required to maintain homeostasis

Question 13

All matter is made up of atoms.

Accepted Answer

A) True 
 B)False

Question 14

The more buffers present in a body fluid, the more likely that the blood pH will change after absorbing nutrients during digestion.

Accepted Answer

A) True 
 B)False

Question 15

When water is released from a dam, potential energy is converted to chemical energy.

Accepted Answer

A) True 
 B)False

Question 16

Which one of the following is TRUE regarding enzymes?

Accepted Answer

A)  Enzyme function is not affected by changes in temperature or pH. 
B)  Enzymes slow the rate of chemical reactions in living systems. 
C)  Enzymes are consumed in a chemical reaction, so an organism must constantly replace these enzymes. 
D)  Each enzyme catalyzes one specific reaction or group of reactions. 
E)  Enzymes convert products into reactants. 
A)  Enzyme function is not affected by changes in temperature or pH. 
B)  Enzymes slow the rate of chemical reactions in living systems. 
C)  Enzymes are consumed in a chemical reaction, so an organism must constantly replace these enzymes. 
D)  Each enzyme catalyzes one specific reaction or group of reactions. 
E)  Enzymes convert products into reactants.

Question 17

Match between columns
                        Premises: a triglyceride that has double bonds in its fatty acids and is a liquid at room temperature
a molecule consisting of glycerol plus fatty acid chains with two hydrogen atoms per carbon atom; solid at room temperature
a strand of 3 to 100 amino acids
lipid that stabilizes membranes and is a precursor to many hormones
dominant energy source used by cells
a double strand of nucleotides; stores genetic information
a polysaccharide stored in the human body
major structural polysaccharide produced by plants

Accepted Answer

The Answer of cholesterol and glucose and unsaturated fat and is...

Question 18

A student has isolated a large compound (macromolecule) from cells. Chemical analysis of the compound shows that it is made up of the following elements: carbon, hydrogen, oxygen, nitrogen, and phosphorus. To which group of macromolecules does this compound most likely belong?

Accepted Answer

A)  carbohydrate 
B)  protein 
C)  nucleic acid 
D)  lipid 
E)  aqueous 
A)  carbohydrate 
B)  protein 
C)  nucleic acid 
D)  lipid 
E)  aqueous

Question 19

An electrically charged molecule or atom is a(n) ________.

Accepted Answer

The answer of An electrically charged molecule or atom is...

Question 20

Because carbon requires four additional electrons to fill its outermost shell, it has a natural tendency to form four covalent bonds with other atoms, making it an ideal element for forming structures in living cells.

Accepted Answer

A) True 
 B)False

Exam 2: The Chemistry of Living Things

Which one of the following is TRUE regarding electrons, shells, and energy?

A diet rich in ________ fat is believed to contribute to the development of cardiovascular disease.

DNA differs from RNA in that DNA

Water held behind a dam has a large amount of ________ energy.

The molecule that stores the set of instructions of a cell and directs everything a cell does is ________.

Which one of the following is needed to synthesize a new strand of DNA?

-In order for this atom to be electrically neutral, the number of subatomic particles labeled "A" in the figure would have to equal the number of ________.

Which one of the following is a lipid?

Use the letters from the figure below to answer the following questions. -The number of subatomic particles ________ is the atomic number of that atom.

If your blood pH is lowered significantly, many proteins will not be able to fold correctly. The result will be decreased enzyme function throughout the body.

Body fluids in humans have a high buffering capacity because of

All matter is made up of atoms.

The more buffers present in a body fluid, the more likely that the blood pH will change after absorbing nutrients during digestion.

When water is released from a dam, potential energy is converted to chemical energy.

Which one of the following is TRUE regarding enzymes?

A student has isolated a large compound (macromolecule) from cells. Chemical analysis of the compound shows that it is made up of the following elements: carbon, hydrogen, oxygen, nitrogen, and phosphorus. To which group of macromolecules does this compound most likely belong?

An electrically charged molecule or atom is a(n) ________.

Because carbon requires four additional electrons to fill its outermost shell, it has a natural tendency to form four covalent bonds with other atoms, making it an ideal element for forming structures in living cells.

Human Biology, Science, and Society

Structure and Function of Cells

From Cells to Organ Systems

The Skeletal System

The Muscular System

Blood

Heart and Blood Vessels

The Immune System and Mechanisms of Defense

The Respiratory System: Exchange of Gases

The Nervous System: Integration and Control

Sensory Mechanisms

The Endocrine System

The Digestive System and Nutrition

The Urinary System

Reproductive Systems

Cell Reproduction and Differentiation

Cancer: Uncontrolled Cell Division and Differentiation

Genetics and Inheritance

DNA Technology and Genetic Engineering

Development and Aging

Evolution and the Origins of Life

Ecosystems and Populations

Human Impacts, Biodiversity, and Environmental Issues

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