Question 1

Match each of the following descriptions to the appropriate term. Each term may be used only once.
-attractive forces between atoms in molecules

Accepted Answer

A) proton 
B) nucleic acids 
C) carbohydrates 
D) lipids 
E) isotopes
F)electrons
G)amino acids
H)atom
I)chemical bonds
J)matter
K)molecules
L)elements 
A) proton 
B) nucleic acids 
C) carbohydrates 
D) lipids 
E) isotopes
F)electrons
G)amino acids
H)atom
I)chemical bonds
J)matter
K)molecules
L)elements

Question 2

Match each of the following descriptions to the appropriate term. Each term may be used only once.
-matter that cannot be broken down

Accepted Answer

A) proton 
B) nucleic acids 
C) carbohydrates 
D) lipids 
E) isotopes
F)electrons
G)amino acids
H)atom
I)chemical bonds
J)matter
K)molecules
L)elements 
A) proton 
B) nucleic acids 
C) carbohydrates 
D) lipids 
E) isotopes
F)electrons
G)amino acids
H)atom
I)chemical bonds
J)matter
K)molecules
L)elements

Question 3

A substance that helps to maintain a stable pH is a(n) ________.

Accepted Answer

The answer of A substance that helps to maintain a...

Question 4

Lipid molecules composed of four joined carbon rings, such as cholesterol, are known as ________.

Accepted Answer

The answer of Lipid molecules composed of four joined carbon...

Question 5

Which one of the following statements is TRUE regarding the structure of the atom?

Accepted Answer

A)  The nucleus is composed of equal numbers of positively charged particles and negatively charged particles. 
B)  All electrons are located at the same distance from the nucleus. 
C)  In small elements, such as carbon, electrons have a positive charge; in larger elements, such as barium, electrons have a negative charge. 
D)  Most of the mass of an atom is due to its protons and neutrons. 
E)  Neutrons carry a negative charge. 
A)  The nucleus is composed of equal numbers of positively charged particles and negatively charged particles. 
B)  All electrons are located at the same distance from the nucleus. 
C)  In small elements, such as carbon, electrons have a positive charge; in larger elements, such as barium, electrons have a negative charge. 
D)  Most of the mass of an atom is due to its protons and neutrons. 
E)  Neutrons carry a negative charge.

Question 6

The four nucleotides that make up DNA contain a sugar component called ________.

Accepted Answer

The answer of The four nucleotides that make up DNA...

Question 7

Water is an excellent solvent for biological systems because

Accepted Answer

A)  it can maintain a relatively unstable temperature for chemical reactions to occur. 
B)  compounds with ionic bonds as well as those with polar covalent bonds readily dissolve in water. 
C)  it is semisolid at body temperature, preventing it from flowing freely through the human body. 
D)  it can rearrange its bonds, forming covalent bonds with other molecules once dissolved. 
A)  it can maintain a relatively unstable temperature for chemical reactions to occur. 
B)  compounds with ionic bonds as well as those with polar covalent bonds readily dissolve in water. 
C)  it is semisolid at body temperature, preventing it from flowing freely through the human body. 
D)  it can rearrange its bonds, forming covalent bonds with other molecules once dissolved.

Question 8

Match each of the following descriptions to the appropriate term. Each term may be used only once.
-a component of an atom that carries a positive charge

Accepted Answer

A) proton 
B) nucleic acids 
C) carbohydrates 
D) lipids 
E) isotopes
F)electrons
G)amino acids
H)atom
I)chemical bonds
J)matter
K)molecules
L)elements 
A) proton 
B) nucleic acids 
C) carbohydrates 
D) lipids 
E) isotopes
F)electrons
G)amino acids
H)atom
I)chemical bonds
J)matter
K)molecules
L)elements

Question 9

Lipids are important to biological systems because

Accepted Answer

A)  they are solid at body temperature so they stabilize membranes. 
B)  some lipid types are potentially large sources of energy to perform cellular work. 
C)  most help to buffer aqueous solutions in the body. 
D)  all lipids are very soluble in water. 
E)  they are able to store and transmit genetic information. 
A)  they are solid at body temperature so they stabilize membranes. 
B)  some lipid types are potentially large sources of energy to perform cellular work. 
C)  most help to buffer aqueous solutions in the body. 
D)  all lipids are very soluble in water. 
E)  they are able to store and transmit genetic information.

Question 10

Use the letters from the accompanying figure 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 accompanying figure...

Question 11

A research student is analyzing the nucleic acid of a virus. He finds that the nucleic acid contains thymine. From this it can be concluded that the nucleic acid

Accepted Answer

A)  contains uracil. 
B)  contains ribose. 
C)  is actually a protein. 
D)  contains glucose. 
E)  is a strand of DNA. 
A)  contains uracil. 
B)  contains ribose. 
C)  is actually a protein. 
D)  contains glucose. 
E)  is a strand of DNA.

Question 12

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 13

Match each of the following descriptions to the appropriate term. Each term may be used only once.
-anything that has mass and occupies space

Accepted Answer

A) proton 
B) nucleic acids 
C) carbohydrates 
D) lipids 
E) isotopes
F)electrons
G)amino acids
H)atom
I)chemical bonds
J)matter
K)molecules
L)elements 
A) proton 
B) nucleic acids 
C) carbohydrates 
D) lipids 
E) isotopes
F)electrons
G)amino acids
H)atom
I)chemical bonds
J)matter
K)molecules
L)elements

Question 14

Use the letters from the accompanying figure to answer the following questions.
  
-In order for this atom to develop a positive charge, it would have to lose ________.

Accepted Answer

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

Question 15

In the human body, bicarbonate and carbonate ions work together to stabilize or buffer the pH of body fluids. What would happen to blood if these buffering agents were removed?

Accepted Answer

Blood pH could not be regulated in the a

Question 16

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 17

Which one of the following molecules is stored in adipose tissue and serves as an important source of energy for the human body?

Accepted Answer

A)  glucose 
B)  steroids 
C)  glycogen 
D)  triglycerides 
E)  phospholipids 
A)  glucose 
B)  steroids 
C)  glycogen 
D)  triglycerides 
E)  phospholipids

Question 18

Water can ________ heat to help prevent rapid body temperature changes.

Accepted Answer

The answer of Water can ________ heat to help prevent...

Exam 2: The Chemistry of Living Things

Match each of the following descriptions to the appropriate term. Each term may be used only once. -attractive forces between atoms in molecules

Match each of the following descriptions to the appropriate term. Each term may be used only once. -matter that cannot be broken down

A substance that helps to maintain a stable pH is a(n) ________.

Lipid molecules composed of four joined carbon rings, such as cholesterol, are known as ________.

Which one of the following statements is TRUE regarding the structure of the atom?

The four nucleotides that make up DNA contain a sugar component called ________.

Water is an excellent solvent for biological systems because

Match each of the following descriptions to the appropriate term. Each term may be used only once. -a component of an atom that carries a positive charge

Lipids are important to biological systems because

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

A research student is analyzing the nucleic acid of a virus. He finds that the nucleic acid contains thymine. From this it can be concluded that the nucleic acid

Which one of the following is a lipid?

Match each of the following descriptions to the appropriate term. Each term may be used only once. -anything that has mass and occupies space

Use the letters from the accompanying figure to answer the following questions. -In order for this atom to develop a positive charge, it would have to lose ________.

In the human body, bicarbonate and carbonate ions work together to stabilize or buffer the pH of body fluids. What would happen to blood if these buffering agents were removed?

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

Which one of the following molecules is stored in adipose tissue and serves as an important source of energy for the human body?

Water can ________ heat to help prevent rapid body temperature changes.

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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