Question 1

Which substance is hydrophobic?

Accepted Answer

A)  canola oil 
B)  sodium chloride 
C)  sugar 
D)  water 
E)  the potassium ion 
A)  canola oil 
B)  sodium chloride 
C)  sugar 
D)  water 
E)  the potassium ion

Question 2

Primary protein structure is dependent upon ____.

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)  covalent linkages between the polypeptide and sugars or lipids 
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)  covalent linkages between the polypeptide and sugars or lipids

Question 3

In a polymer of nucleotides, how does one nucleotide attach to another?

Accepted Answer

A)  The base of one nucleotide is attached to the base of the next. 
B)  The base of one nucleotide it attached to the sugar of the next. 
C)  The sugar of one nucleotide is attached to the sugar of the next. 
D)  The phosphate group of one nucleotide is attached to the base of the next. 
E)  The phosphate group of one nucleotide is attached to the sugar of the next. 
A)  The base of one nucleotide is attached to the base of the next. 
B)  The base of one nucleotide it attached to the sugar of the next. 
C)  The sugar of one nucleotide is attached to the sugar of the next. 
D)  The phosphate group of one nucleotide is attached to the base of the next. 
E)  The phosphate group of one nucleotide is attached to the sugar of the next.

Question 4

The negative subatomic particle is the ____.

Accepted Answer

A)  neutron 
B)  proton 
C)  electron 
D)  quark 
E)  Higg's boson 
A)  neutron 
B)  proton 
C)  electron 
D)  quark 
E)  Higg's boson

Question 5

The positively charged ion, potassium, and the negatively charged ion, fluoride, will form what kind of bond?

Accepted Answer

A)  ionic 
B)  polar covalent 
C)  nonpolar covalent 
D)  hydrogen 
E)  isotonic 
A)  ionic 
B)  polar covalent 
C)  nonpolar covalent 
D)  hydrogen 
E)  isotonic

Question 6

Match between columns
                        Premises: the bond in which electrons are shared
the bond between the atoms in an NaCl molecule
the bond that breaks when salts dissolve in water
the property that allows certain insects to walk on water
the bond between the hydrogen atoms of molecular hydrogen
the bond that gives water special properties
the bond that holds organic molecules together

Accepted Answer

The Answer of evaporation and covalent and cohesion and ionic is...

Question 7

Of these pH values, which has the highest concentration of hydrogen ions?

Accepted Answer

A)  1 
B)  3 
C)  5 
D)  7 
E)  9 
A)  1 
B)  3 
C)  5 
D)  7 
E)  9

Question 8

Glucose dissolves in water because it ____.

Accepted Answer

A)  ionizes 
B)  is a polysaccharide 
C)  is polar and forms many hydrogen bonds with water molecules 
D)  has a very reactive primary structure 
E)  is an isotope 
A)  ionizes 
B)  is a polysaccharide 
C)  is polar and forms many hydrogen bonds with water molecules 
D)  has a very reactive primary structure 
E)  is an isotope

Question 9

Water molecules are attracted to one another because the ____.

Accepted Answer

A)  slightly positive charge of the hydrogen atom from one molecule of water attracts the slightly negative charge of the oxygen atom from another molecule 
B)  slightly negative charge of the hydrogen atom from one molecule of water attracts the slightly negative charge of the oxygen atom from another molecule 
C)  slightly positive charge of the hydrogen atom attracts the oxygen within the same molecule of water, which leads to an increase in its polarity 
D)  water molecules participate in nonpolar covalent bonds, which increase the attraction of the molecules to each other 
E)  water molecules bind to each other through their mutual attraction to ionic compounds 
A)  slightly positive charge of the hydrogen atom from one molecule of water attracts the slightly negative charge of the oxygen atom from another molecule 
B)  slightly negative charge of the hydrogen atom from one molecule of water attracts the slightly negative charge of the oxygen atom from another molecule 
C)  slightly positive charge of the hydrogen atom attracts the oxygen within the same molecule of water, which leads to an increase in its polarity 
D)  water molecules participate in nonpolar covalent bonds, which increase the attraction of the molecules to each other 
E)  water molecules bind to each other through their mutual attraction to ionic compounds

Question 10

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 hydrogen atoms 
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 hydrogen atoms 
D)  mainly come from animals 
E)  consist of straight chain fatty acids

Question 11

How many carbons are present in this figure?

Accepted Answer

A)  zero 
B)  four 
C)  five 
D)  six 
E)  seven 
A)  zero 
B)  four 
C)  five 
D)  six 
E)  seven

Question 12

Hydrogen bonding ____ the movement of molecules, therefore, substances that form a lot of hydrogen bonds, like water, will require ____ energy to increase their temperature by one degree Celsius.

Accepted Answer

A)  decreases; less 
B)  decreases; more 
C)  does not affect; no additional 
D)  increases; less 
E)  increases; more 
A)  decreases; less 
B)  decreases; more 
C)  does not affect; no additional 
D)  increases; less 
E)  increases; more

Question 13

Which food product would likely contain the largest amount of unsaturated fat?

Accepted Answer

A)  butter 
B)  lard 
C)  cream 
D)  olives 
E)  cheese 
A)  butter 
B)  lard 
C)  cream 
D)  olives 
E)  cheese

Question 14

Hydrophobic molecules are ____ water.

Accepted Answer

A)  attracted by 
B)  absorbed by 
C)  repelled by 
D)  mixed with 
E)  polarized by 
A)  attracted by 
B)  absorbed by 
C)  repelled by 
D)  mixed with 
E)  polarized by

Question 15

Which type of bonding allows the long, straight chains of cellulose to lock together tightly?

Accepted Answer

A)  hydrogen 
B)  polar covalent 
C)  ionic 
D)  nonpolar covalent 
E)  metallic 
A)  hydrogen 
B)  polar covalent 
C)  ionic 
D)  nonpolar covalent 
E)  metallic

Question 16

The neutral subatomic particle is the ____.

Accepted Answer

A)  neutron 
B)  proton 
C)  electron 
D)  quark 
E)  Higg's boson 
A)  neutron 
B)  proton 
C)  electron 
D)  quark 
E)  Higg's boson

Question 17

Fats will dissolve in ethanol. Ethanol is an example of a ____.

Accepted Answer

A)  solute 
B)  solution 
C)  solvent 
D)  salt 
E)  ion 
A)  solute 
B)  solution 
C)  solvent 
D)  salt 
E)  ion

Question 18

Oxygen has an atomic number of 8. This means that oxygen has ____.

Accepted Answer

A)  eight electrons in its outer most shell 
B)  eight neutrons in its nucleus 
C)  four protons and four neutrons in its nucleus 
D)  eight protons in its nucleus 
E)  eight protons and eight neutrons in its nucleus 
A)  eight electrons in its outer most shell 
B)  eight neutrons in its nucleus 
C)  four protons and four neutrons in its nucleus 
D)  eight protons in its nucleus 
E)  eight protons and eight neutrons in its nucleus

Question 19

When water molecules form into ice, ____.

Accepted Answer

A)  the water molecules jiggle more 
B)  their structure becomes less rigid 
C)  the water molecules pack less densely 
D)  hydrogen bonds between water molecules readily break 
E)  evaporation of water molecules happens more readily 
A)  the water molecules jiggle more 
B)  their structure becomes less rigid 
C)  the water molecules pack less densely 
D)  hydrogen bonds between water molecules readily break 
E)  evaporation of water molecules happens more readily

Question 20

Large polymers are formed from smaller subunits by which type of reaction?

Accepted Answer

A)  oxidation 
B)  reduction 
C)  condensation 
D)  hydrolysis 
E)  decarboxylation 
A)  oxidation 
B)  reduction 
C)  condensation 
D)  hydrolysis 
E)  decarboxylation

Exam 2: Molecules of Life

Which substance is hydrophobic?

Primary protein structure is dependent upon ____.

In a polymer of nucleotides, how does one nucleotide attach to another?

The negative subatomic particle is the ____.

The positively charged ion, potassium, and the negatively charged ion, fluoride, will form what kind of bond?

Of these pH values, which has the highest concentration of hydrogen ions?

Glucose dissolves in water because it ____.

Water molecules are attracted to one another because the ____.

Unsaturated fats ____.

How many carbons are present in this figure?

Hydrogen bonding ____ the movement of molecules, therefore, substances that form a lot of hydrogen bonds, like water, will require ____ energy to increase their temperature by one degree Celsius.

Which food product would likely contain the largest amount of unsaturated fat?

Hydrophobic molecules are ____ water.

Which type of bonding allows the long, straight chains of cellulose to lock together tightly?

The neutral subatomic particle is the ____.

Fats will dissolve in ethanol. Ethanol is an example of a ____.

Oxygen has an atomic number of 8. This means that oxygen has ____.

When water molecules form into ice, ____.

Large polymers are formed from smaller subunits by which type of reaction?

Invitation to Biology

Cell Structure

Energy and Metabolism

Photosynthesis

Releasing Chemical Energy

Dna Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Prokaryotes, Protists, and 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

Animal Reproduction and Development

Plant Form and Function

Life Cycles of Flowering Plants

Filters

Hydrogen bonding the movement of molecules, therefore, substances that form a lot of hydrogen bonds, like water, will require energy to increase their temperature by one degree Celsius.