Question 1

What is the most important function of carbohydrates?

Accepted Answer

A)  to form and maintain the cell membrane
B)  to provide the basic structure for all steroid hormones to be derived
C)  they act as enzymes
D)  they are the building blocks of proteins
E)  they are the primary energy sourceF) B) and D)
G) B) and E)

Question 2

Compounds that can be synthesized or broken down by chemical reactions inside the body are called

Accepted Answer

A)  inorganic compounds.
B)  organic compounds.
C)  nutrients.
D)  metabolites.
E)  enzymes.F) C) and E)
G) C) and D)

Question 3

________ are soluble inorganic compounds whose solutions will conduct an electric current.

Accepted Answer

A)  Proteins
B)  Lipids
C)  Ions
D)  Electrolytes
E)  EnzymesF) B) and E)
G) A) and B)

Question 4

Which of the following is a structural component of hormones?

Accepted Answer

A)  monoglycerides
B)  prostaglandins
C)  lauric acid
D)  phospholipids
E)  steroidsF) A) and B)
G) A) and C)

Question 5

What product is formed from the addition of a phosphate group to ADP?

Accepted Answer

A)  adenosine diphosphate
B)  adenine
C)  adenosine triphosphate
D)  deoxyribonucleic acid
E)  riboseF) A) and B)
G) B) and D)

Question 6

A(n) ________ removes hydrogen ions,and a(n) ________ releases hydrogen ions.

Accepted Answer

A)  acid; base
B)  base; acid
C)  compound; element
D)  element; compound
E)  molecule; acidF) A) and B)
G) C) and D)

Question 7

Chemical reactions that yield energy,such as heat,are said to be

Accepted Answer

A)  endergonic.
B)  activated.
C)  exergonic.
D)  neutral.
E)  thermonuclear.F) None of the above
G) C) and D)

Question 8

Kinetic energy is stored as ________ energy when a spring is stretched.

Accepted Answer

A)  chemical
B)  work
C)  thermal
D)  potential
E)  motionF) A) and B)
G) C) and D)

Question 9

Compare and contrast the terms work,energy,potential energy,and kinetic energy.

Accepted Answer

Work is the movement of an object or a c...

Question 10

In the body,inorganic compounds

Accepted Answer

A)  can serve as buffers.
B)  can make up proteins.
C)  can make up lipids.
D)  are structural components of cells.
E)  are all very large.F) B) and C)
G) A) and D)

Question 11

Carbohydrate molecules

Accepted Answer

A)  are the building blocks of cellular membranes.
B)  form the regulatory molecules known as enzymes.
C)  are the body's most readily available source of energy.
D)  are composed of C,H,O,and N atoms.
E)  contain the genetic information found in cells.F) B) and D)
G) C) and E)

Question 12

What is formula weight?

Accepted Answer

A)  the sum of the atomic weights of its component atoms
B)  the weight in grams equal to the element's atomic weight
C)  the total weight of an element including the isotopes
D)  the average weight of an element's different atomic masses and proportions of its different isotopes
E)  the sum of the atomic weights of the elements making up an ionic compoundF) B) and E)
G) A) and C)

Question 13

How is it possible for two samples of hydrogen to contain the same number of atoms yet have different weights?

Accepted Answer

Isotopes are atoms with the same number ...

Question 14

Describe the orientations of phospholipids and glycolipids when they form a micelle.

Accepted Answer

A)  The hydrophobic tails are inside,and the hydrophilic heads form the surface of the micelle.
B)  The hydrophilic tails are inside,and the hydrophobic heads form the surface of the micelle.
C)  The hydrophobic heads are inside,and the hydrophilic tails form the surface of the micelle.
D)  The hydrophilic heads are inside,and the hydrophobic tails form the surface of the micelle.
E)  The phospholipids are on the inside,and the glycolipids form the surface of the micelle.F) D) and E)
G) C) and D)

Question 15

Describe the importance of hemoglobin.

Accepted Answer

It is a globular protein,which is made o...

Question 16

Describe why table salt is a compound.

Accepted Answer

A)  Table salt is a compound because it is made up of more than one element in different proportions.
B)  Table salt is a compound because it is made up of only one element with different isotopes.
C)  Table salt is a compound because it is made up of only one element bound with more than one type of chemical bond.
D)  Table salt is a compound because it is made up of more than one isotope in different proportions.
E)  Table salt is a compound because it is made up of more than one element in a fixed proportion.F) A) and C)
G) None of the above

Question 17

Carbon-12 (12C) is the most common form of the element carbon.How is the isotope carbon-13 (13C) similar to and different from 12C?

Accepted Answer

A)  Isotope 13C has the same chemical properties but has one more electron than 12C.
B)  Isotope 13C has the same chemical properties but has one more proton than 12C.
C)  Isotope 13C has the same chemical properties but has one more neutron than 12C.
D)  Isotope 13C has different chemical properties and has one more electron and one more proton than 12C.
E)  Isotope 13C has different chemical properties and has one more electron than 12C.F) All of the above
G) A) and C)

Question 18

________ accelerate chemical reactions that occur in the human body.

Accepted Answer

A)  Enzymes
B)  Reactants
C)  Products
D)  Metabolites
E)  NutrientsF) A) and E)
G) None of the above

Question 19

The smallest stable units of matter are

Accepted Answer

A)  atoms.
B)  molecules.
C)  protons.
D)  neutrons.
E)  electrons.F) B) and C)
G) B) and E)

Question 20

Oppositely charged ions in solution are prevented from combining by

Accepted Answer

A)  heat capacity of water.
B)  hydration spheres.
C)  water's nonpolar nature.
D)  free radicals.
E)  hydrogen bonding.F) B) and E)
G) None of the above

Exam 2: Chemical Level of Organization

Chemical reactions that yield energy,such as heat,are said to be

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Describe why table salt is a compound.

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In the body,inorganic compounds

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Carbohydrate molecules

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What is formula weight?

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The smallest stable units of matter are

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Carbon-12 (12C) is the most common form of the element carbon.How is the isotope carbon-13 (13C) similar to and different from 12C?

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________ are soluble inorganic compounds whose solutions will conduct an electric current.

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________ accelerate chemical reactions that occur in the human body.

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Compounds that can be synthesized or broken down by chemical reactions inside the body are called

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Describe the importance of hemoglobin.

Correct AnswerverifiedIt is a globular protein,which is made o...View AnswerShow Answer

Kinetic energy is stored as ________ energy when a spring is stretched.

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What is the most important function of carbohydrates?

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A(n) ________ removes hydrogen ions,and a(n) ________ releases hydrogen ions.

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What product is formed from the addition of a phosphate group to ADP?

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Compare and contrast the terms work,energy,potential energy,and kinetic energy.

Correct AnswerverifiedWork is the movement of an object or a c...View AnswerShow Answer

Describe the orientations of phospholipids and glycolipids when they form a micelle.

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Which of the following is a structural component of hormones?

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How is it possible for two samples of hydrogen to contain the same number of atoms yet have different weights?

Correct AnswerverifiedIsotopes are atoms with the same number ...View AnswerShow Answer

Oppositely charged ions in solution are prevented from combining by

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It is a globular protein,which is made o...
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A(n) removes hydrogen ions,and a(n) releases hydrogen ions.

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Work is the movement of an object or a c...
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Isotopes are atoms with the same number ...
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