Question 1

Which compound is the body's main energy source?

Accepted Answer

A)  Protein 
B)  Carbohydrates 
C)  Fats 
D)  Enzymes 
A)  Protein 
B)  Carbohydrates 
C)  Fats 
D)  Enzymes B

Question 2

How do cells obtain energy?

Accepted Answer

A)  Energy is made in the liver and released into the blood for the cells to use. 
B)  Cells break down protein molecules. 
C)  Energy stored as fat is released into the blood. 
D)  Cells break bonds in ATP molecules. 
A)  Energy is made in the liver and released into the blood for the cells to use. 
B)  Cells break down protein molecules. 
C)  Energy stored as fat is released into the blood. 
D)  Cells break bonds in ATP molecules. D

Question 3

Where are protons and neutrons located?

Accepted Answer

A)  Protons and neutrons orbit the nucleus in one or more concentric clouds. 
B)  Protons orbit the nucleus in a cloud,and neutrons reside in the nucleus. 
C)  Protons and neutrons both reside in the nucleus. 
D)  Neutrons orbit the nucleus in a cloud,whereas protons reside in the nucleus. 
A)  Protons and neutrons orbit the nucleus in one or more concentric clouds. 
B)  Protons orbit the nucleus in a cloud,and neutrons reside in the nucleus. 
C)  Protons and neutrons both reside in the nucleus. 
D)  Neutrons orbit the nucleus in a cloud,whereas protons reside in the nucleus. C

Question 4

What molecular configuration is necessary for a fat to be unsaturated?

Accepted Answer

A)  Every other carbon forms a single bond with hydrogen. 
B)  The hydrocarbon chain contains all single covalent bonds. 
C)  A carboxyl group bonds to the hydrocarbon chain. 
D)  The hydrocarbon chain contains at least one double bond. 
A)  Every other carbon forms a single bond with hydrogen. 
B)  The hydrocarbon chain contains all single covalent bonds. 
C)  A carboxyl group bonds to the hydrocarbon chain. 
D)  The hydrocarbon chain contains at least one double bond.

Question 5

Which statement relates best to why water is so important to the human body?

Accepted Answer

A)  The average adult human body is about 60% water. 
B)  Water is needed for most chemical reactions to take place. 
C)  All the cells in the body are surrounded by water. 
D)  Water lubricates many body tissues. 
A)  The average adult human body is about 60% water. 
B)  Water is needed for most chemical reactions to take place. 
C)  All the cells in the body are surrounded by water. 
D)  Water lubricates many body tissues.

Question 6

Metabolism is

Accepted Answer

A)  the breakdown of food in the digestive tract. 
B)  the creation of complex molecules from smaller units. 
C)  all the chemical reactions that occur in the body. 
D)  the chemical processes performed by the liver. 
A)  the breakdown of food in the digestive tract. 
B)  the creation of complex molecules from smaller units. 
C)  all the chemical reactions that occur in the body. 
D)  the chemical processes performed by the liver.

Question 7

Which type of carbohydrate provides the body with the most steady supply of energy and why?

Accepted Answer

A)  Monosaccharides,because they break down quickly 
B)  Disaccharides,because they contain two sugar units bonded together 
C)  Polysaccharides,because their multiple bonds take longer to break down 
D)  Fatty saccharides,because fat slows digestion 
A)  Monosaccharides,because they break down quickly 
B)  Disaccharides,because they contain two sugar units bonded together 
C)  Polysaccharides,because their multiple bonds take longer to break down 
D)  Fatty saccharides,because fat slows digestion

Question 8

In general,what type of process is wound healing and what are the implications from the standpoint of energy?

Accepted Answer

A)  It is an anabolic process that releases energy. 
B)  It is an anabolic process that requires energy. 
C)  It is a catabolic process that releases energy. 
D)  It is a catabolic process that requires energy. 
A)  It is an anabolic process that releases energy. 
B)  It is an anabolic process that requires energy. 
C)  It is a catabolic process that releases energy. 
D)  It is a catabolic process that requires energy.

Question 9

Which statement about isotopes is true?

Accepted Answer

A)  Each isotope of an element has chemical properties that differ from those of other isotopes of the same element. 
B)  Isotopes of an element have different numbers of protons. 
C)  Some isotopes are unstable and decay. 
D)  All isotopes emit radiation. 
A)  Each isotope of an element has chemical properties that differ from those of other isotopes of the same element. 
B)  Isotopes of an element have different numbers of protons. 
C)  Some isotopes are unstable and decay. 
D)  All isotopes emit radiation.

Question 10

Covalent bonds form when

Accepted Answer

A)  positively charged hydrogen atoms attract negatively charged atoms. 
B)  electrostatic forces bring atoms together to form a new molecule. 
C)  two atoms share electrons to fill their outer shells. 
D)  a nitrogen atom combines with a carbon atom. 
A)  positively charged hydrogen atoms attract negatively charged atoms. 
B)  electrostatic forces bring atoms together to form a new molecule. 
C)  two atoms share electrons to fill their outer shells. 
D)  a nitrogen atom combines with a carbon atom.

Question 11

An atom is stable when the outer shell contains how many electrons?

Accepted Answer

A)  Four 
B)  Six 
C)  Eight 
D)  Twelve 
A)  Four 
B)  Six 
C)  Eight 
D)  Twelve

Question 12

Adding or removing electrons from an atom results in the formation of a(n)

Accepted Answer

A)  isotope. 
B)  different element. 
C)  ion. 
D)  change in the atom's atomic weight. 
A)  isotope. 
B)  different element. 
C)  ion. 
D)  change in the atom's atomic weight.

Question 13

What causes an atom to emit radiation?

Accepted Answer

A)  The electron cloud emits small amounts of radiation as the electrons accelerate. 
B)  Unstable isotopes emit radiation as they decay. 
C)  Atoms emit radiation when covalent bonds break down. 
D)  Atoms emit radiation when ionic bonds break down. 
A)  The electron cloud emits small amounts of radiation as the electrons accelerate. 
B)  Unstable isotopes emit radiation as they decay. 
C)  Atoms emit radiation when covalent bonds break down. 
D)  Atoms emit radiation when ionic bonds break down.

Question 14

Which element makes up the greatest percentage of the body's weight?

Accepted Answer

A)  Carbon 
B)  Hydrogen 
C)  Nitrogen 
D)  Oxygen 
A)  Carbon 
B)  Hydrogen 
C)  Nitrogen 
D)  Oxygen

Question 15

Which lipid is a concentrated source of energy for the body?

Accepted Answer

A)  Phospholipids 
B)  Triglycerides 
C)  Steroids 
D)  Cholesterol 
A)  Phospholipids 
B)  Triglycerides 
C)  Steroids 
D)  Cholesterol

Question 16

Nucleic acids and nucleotides form

Accepted Answer

A)  proteins. 
B)  fatty acids. 
C)  DNA and RNA. 
D)  amino acids. 
A)  proteins. 
B)  fatty acids. 
C)  DNA and RNA. 
D)  amino acids.

Question 17

Which type of chemical reaction allows the body to create new proteins?

Accepted Answer

A)  Exchange 
B)  Decomposition 
C)  Synthesis 
D)  Fusion 
A)  Exchange 
B)  Decomposition 
C)  Synthesis 
D)  Fusion

Question 18

Why do atoms lose,gain,or share electrons?

Accepted Answer

A)  To release energy 
B)  To obtain stability 
C)  To increase bonding 
D)  To form compounds 
A)  To release energy 
B)  To obtain stability 
C)  To increase bonding 
D)  To form compounds

Question 19

Which element differentiates organic compounds from inorganic compounds?

Accepted Answer

A)  Oxygen 
B)  Hydrogen 
C)  Carbon 
D)  Nitrogen 
A)  Oxygen 
B)  Hydrogen 
C)  Carbon 
D)  Nitrogen

Question 20

The four main organic compounds in the human body are

Accepted Answer

A)  carbohydrates,bile acids,lipids,and proteins. 
B)  carbohydrates,nucleic acids,proteins,and lipids. 
C)  calcium carbonate,protein,carbohydrates,and hemoglobin. 
D)  hemoglobin,nucleic acids,carbohydrates,and protein. 
A)  carbohydrates,bile acids,lipids,and proteins. 
B)  carbohydrates,nucleic acids,proteins,and lipids. 
C)  calcium carbonate,protein,carbohydrates,and hemoglobin. 
D)  hemoglobin,nucleic acids,carbohydrates,and protein.

Exam 2: Chemistry of Life

Which compound is the body's main energy source?

How do cells obtain energy?

Where are protons and neutrons located?

What molecular configuration is necessary for a fat to be unsaturated?

Which statement relates best to why water is so important to the human body?

Metabolism is

Which type of carbohydrate provides the body with the most steady supply of energy and why?

In general,what type of process is wound healing and what are the implications from the standpoint of energy?

Which statement about isotopes is true?

Covalent bonds form when

An atom is stable when the outer shell contains how many electrons?

Adding or removing electrons from an atom results in the formation of a(n)

What causes an atom to emit radiation?

Which element makes up the greatest percentage of the body's weight?

Which lipid is a concentrated source of energy for the body?

Nucleic acids and nucleotides form

Which type of chemical reaction allows the body to create new proteins?

Why do atoms lose,gain,or share electrons?

Which element differentiates organic compounds from inorganic compounds?

The four main organic compounds in the human body are

Orientation to the Human Body

Cells

Tissues

Integumentary System

Bones Bone Tissue

Skeletal System

Joints

Muscular System

Nervous System

Sense Organs

Endocrine System

Blood

Heart

Vascular System

Lymphatic Immune Systems

Respiratory System

Urinary System

Fluid,electrolyte Acid-Base Balance

Digestive System

Nutrition Metabolism

Human Microbiome

Reproductive Systems

Pregnancy Human Development

Heredity

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