Question 1

Cohesion is a property of water in which water molecules tend to stick together.

Accepted Answer

A) True 
 B)False

Question 2

In the example of ionic bond formation between sodium and chlorine,as shown,which of the following is not a true statement?

Accepted Answer

A)   Sodium donates an electron.
B)   The bond that is formed is stronger than a hydrogen bond.
C)   Na is the chemical symbol for sodium.
D)   Sodium becomes positively charged.
E)   Chlorine donates an electron.F) A) and C)
G) B) and D) E

Question 3

The primary building block (monomer) of nucleic acids is

Accepted Answer

A)   a glucose molecule.
B)   a fatty acid.
C)   a nucleotide.
D)   an amino acid.
E)   a group of four interconnected rings.F) A) and C)
G) A) and B) C

Question 4

Saturated fats have long straight tails of fatty acids,and can pack or clump tightly together in cells and animal bodies.Unsaturated fats have kinks in their tails due to double bonds,which prevents them from packing together as tightly.Animals that are ectothermic (their body temperature fluctuates with the environment) need to keep their membranes fluid at cooler temperature and thus use ______ in their membranes.

Accepted Answer

A)   mostly unsaturated fats
B)   mostly saturated fats
C)   equal amounts of saturated and unsaturated fats
D)   carbohydrates
E)   proteinsF) A) and D)
G) A) and C)

Question 5

In the 1700s,a French scientist,Antoine Lavoisier gained new experimental information about how chemistry works.He isolated chemicals that were reacting,including a metal and an acid.His observation of the results seemed to show that much of the metal had been lost in the chemical reaction.Yet,upon weighing the system,the total amounts of materials had not changed during the reaction.His resulting law of Conservation of Mass also applies to biology,because the materials we are made of are _________ that change forms,but aren't truly lost as we conduct life chemical reactions.

Accepted Answer

A)   isotopes
B)   energy
C)   solutions
D)   matterE) C) and D)
F) B) and C)

Question 6

The primary building block (monomer) of proteins is

Accepted Answer

A)   a nucleotide.
B)   a fatty acid.
C)   a glucose molecule.
D)   a group of four interconnected rings.
E)   an amino acid.F) A) and B)
G) A) and C)

Question 7

In a chemical equation,which components of a chemical reaction is not noted in symbols and abbreviations?

Accepted Answer

A)   Some substance atoms on the left side of the chemical reaction arrow must be destroyed in order to form the substances on the right side.
B)   The reactants, or starting substances, are on the left of the chemical reaction arrow.
C)   The products, or ending substances, are on the right of the chemical reaction arrow.
D)   Reactants and products are on both sides of the yields arrow.
E)   The number of atoms of each element must be the same, balanced on each side of the chemical reaction arrow.F) B) and D)
G) A) and C)

Question 8

An ion is an atom that has

Accepted Answer

A)   a net negative or positive charge, with number of electrons different from number of protons.
B)   a net positive charge.
C)   the same number of electrons as it does protons.
D)   a net negative charge.
E)   a different number of neutrons from the number of protons.F) B) and E)
G) A) and E)

Question 9

Within a single molecule of water,as shown,____ bonds are formed between oxygen and hydrogen.

Accepted Answer

A)   hydrophobic
B)   hydrogen
C)   nuclear
D)   ionic
E)   covalentF) B) and E)
G) A) and C)

Question 10

Many traits of organisms, such as body form and color, are controlled by specific proteins, in turn controlled by the DNA genetic sequence of nucleotides. The genetic control of color, as in aphids, does not usually shift during the life of an organism. Researchers found that some specific aphid populations shift from an original red coloration to a green coloration. Genetics could be a factor, if some programmed shift could be identified. Environmental conditions of the living and nonliving habitat could be a factor. Either way, the chemistry and observed changes of pigment molecules in the aphids can be studied with the scientific method.
-The initial experiment of Koga and Fugatsu,in testing for any bacterial cause of aphid color change,involved all of these except

Accepted Answer

A)   the specific amounts of red and green pigment molecules were initially measured as dependent variables.
B)   a group of aphids infected with Rickettsiella bacteria was grown, then killed in order to produce an extract to test on red aphids.
C)   a group of green aphids was grown, then killed in order to produce an extract to test on red aphids.
D)   a group of red aphids was grown as a control group.
E)   a group of red aphids was treated with the independent variable of Rickettsiella bacteria infection from green aphids.F) A) and B)
G) B) and C)

Question 11

Figuer:
Examine this image of the glucose molecule. 
-In our diets,this molecule is often covalently bonded with others in the polymer form of

Accepted Answer

A)   a complex carbohydrate.
B)   a fatty acid chain.
C)   a triglyceride.
D)   a simple sugar.E) All of the above
F) A) and B)

Question 12

Which is not a lipid?

Accepted Answer

A)   a triglyceride
B)   a phospholipid
C)   a wax
D)   a sterol
E)   a starchF) A) and D)
G) A) and E)

Question 13

Our general economic source of unsaturated fatty acids is from plants,and composed of at least one pair of double-bonded carbons.

Accepted Answer

A) True 
 B)False

Question 14

You can painlessly wade into a pool,but doing a belly flop off of the high diving board hurts because of

Accepted Answer

A)   water's neutral pH.
B)   adhesion in water.
C)   cohesion in water.
D)   water's high density.
E)   water's high boiling point.F) A) and E)
G) A) and B)

Question 15

Many traits of organisms, such as body form and color, are controlled by specific proteins, in turn controlled by the DNA genetic sequence of nucleotides. The genetic control of color, as in aphids, does not usually shift during the life of an organism. Researchers found that some specific aphid populations shift from an original red coloration to a green coloration. Genetics could be a factor, if some programmed shift could be identified. Environmental conditions of the living and nonliving habitat could be a factor. Either way, the chemistry and observed changes of pigment molecules in the aphids can be studied with the scientific method.
-The observations and research on aphid color changes can most directly be summarized in that

Accepted Answer

A)   Koga and Fugatsu proved that the color change from red to green in aphids was ecologically favorable to survival.
B)   species of organisms can be chemically diverse and affect each other, even among similar groups of aphids and bacteria.
C)   the method of paper fiber separation of pigment molecules showed that Ricketsiella bacteria were the source of the green coloration of aphids.
D)   it turned out that the green appearance of aphids was because of the large amount of green Ricketsiella bacteria coating their bodies.E) B) and C)
F) A) and D)

Question 16

Figuer:
Refer to this diagram with common examples of substances and their pH. 
+)  to your blood and body fluids. B)  Your blood and body fluids will likely become more basic, with higher pH than the normal range. C)  Your body will produce buffer molecules to help neutralize acids you ate, so your blood pH doesn't change much. D)  Your blood and body fluids will likely become more acidic, with lower pH than the normal range." class="answers-bank-image d-inline" rel="preload" >
-Our normal blood pH should be in a fairly narrow range.Imagine you sit down to eat a large meal with cola,tomato-based sauce,and a salad with many citrus fruit slices.Identify the one statement that does not apply as one of the likely outcomes of your meal.

Accepted Answer

A)   The cola, tomato and citrus fruits will add hydrogen (H+)  to your blood and body fluids.
B)   Your blood and body fluids will likely become more basic, with higher pH than the normal range.
C)   Your body will produce buffer molecules to help neutralize acids you ate, so your blood pH doesn't change much.
D)   Your blood and body fluids will likely become more acidic, with lower pH than the normal range.E) A) and C)
F) B) and D)

Question 17

Sugars (CH2O) n dissolve well in water because sugars form ____ bonds with water.

Accepted Answer

A)   hydrophobic
B)   hydrogen
C)   non-polar
D)   ionic
E)   covalentF) B) and E)
G) A) and E)

Question 18

Many diseases,cancers and even normal human variations can be caused by mutations and variations in the DNA nucleotide sequence.The most likely immediate result of DNA having a different nucleotide sequence is that

Accepted Answer

A)   the peptide bonds in the protein would by hydrolyzed and the protein would fall apart.
B)   the protein resulting from the DNA mutation would be denatured and nonfunctional.
C)   the primary structure of R group sequence in a protein would be altered.
D)   no direct result of change in the protein molecule would occur if DNA is mutated.E) B) and D)
F) B) and C)

Question 19

The three major components in a nucleotide are

Accepted Answer

A)   a nitrogen base, a five-carbon sugar, and a phosphate group.
B)   a carboxyl group, an R group, and an amino group.
C)   glucose, a nitrogen base, and a phosphate group.
D)   a nitrogen base, a six-carbon sugar, and a phosphate group.
E)   glucose, a fatty acid, and glycerol.F) None of the above
G) A) and C)

Question 20

Figuer:
Examine these two sugars, as shown prior to the chemical reaction that would bond them. 
-The diagram shows glucose and fructose before the chemical reaction called ______ builds a larger polymer from the two monomers.

Accepted Answer

A)   evaporation
B)   dehydration synthesis
C)   hydrolysis
D)   reproductionE) A) and B)
F) All of the above B

Exam 2: The Chemistry of Life

Cohesion is a property of water in which water molecules tend to stick together.

Correct Answer
verified

In the example of ionic bond formation between sodium and chlorine,as shown,which of the following is not a true statement?

Correct Answer
verified
E

The primary building block (monomer) of nucleic acids is

Correct Answer
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C

Correct Answer
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Correct Answer
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The primary building block (monomer) of proteins is

Correct Answer
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In a chemical equation,which components of a chemical reaction is not noted in symbols and abbreviations?

Correct Answer
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An ion is an atom that has

Correct Answer
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Within a single molecule of water,as shown,____ bonds are formed between oxygen and hydrogen.

Correct Answer
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Correct Answer
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Figuer: Examine this image of the glucose molecule. -In our diets,this molecule is often covalently bonded with others in the polymer form of

Correct Answer
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Which is not a lipid?

Correct Answer
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Our general economic source of unsaturated fatty acids is from plants,and composed of at least one pair of double-bonded carbons.

Correct Answer
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You can painlessly wade into a pool,but doing a belly flop off of the high diving board hurts because of

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Sugars (CH₂O) _n dissolve well in water because sugars form ____ bonds with water.

Correct Answer
verified

Many diseases,cancers and even normal human variations can be caused by mutations and variations in the DNA nucleotide sequence.The most likely immediate result of DNA having a different nucleotide sequence is that

Correct Answer
verified

The three major components in a nucleotide are

Correct Answer
verified

Figuer: Examine these two sugars, as shown prior to the chemical reaction that would bond them. -The diagram shows glucose and fructose before the chemical reaction called ______ builds a larger polymer from the two monomers.

Correct Answer
verified
B

Exam 2: The Chemistry of Life

Cohesion is a property of water in which water molecules tend to stick together.

Correct AnswerverifiedShow Answer

In the example of ionic bond formation between sodium and chlorine,as shown,which of the following is not a true statement?

Correct AnswerverifiedE

The primary building block (monomer) of nucleic acids is

Correct AnswerverifiedC

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The primary building block (monomer) of proteins is

Correct AnswerverifiedShow Answer

In a chemical equation,which components of a chemical reaction is not noted in symbols and abbreviations?

Correct AnswerverifiedShow Answer

An ion is an atom that has

Correct AnswerverifiedShow Answer

Within a single molecule of water,as shown,____ bonds are formed between oxygen and hydrogen.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Figuer: Examine this image of the glucose molecule. -In our diets,this molecule is often covalently bonded with others in the polymer form of

Correct AnswerverifiedShow Answer

Which is not a lipid?

Correct AnswerverifiedShow Answer

Our general economic source of unsaturated fatty acids is from plants,and composed of at least one pair of double-bonded carbons.

Correct AnswerverifiedShow Answer

You can painlessly wade into a pool,but doing a belly flop off of the high diving board hurts because of

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Sugars (CH2O) n dissolve well in water because sugars form ____ bonds with water.

Correct AnswerverifiedShow Answer

Many diseases,cancers and even normal human variations can be caused by mutations and variations in the DNA nucleotide sequence.The most likely immediate result of DNA having a different nucleotide sequence is that

Correct AnswerverifiedShow Answer

The three major components in a nucleotide are

Correct AnswerverifiedShow Answer

Figuer: Examine these two sugars, as shown prior to the chemical reaction that would bond them. -The diagram shows glucose and fructose before the chemical reaction called ______ builds a larger polymer from the two monomers.

Correct AnswerverifiedB

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E

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C

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Sugars (CH₂O) _n dissolve well in water because sugars form ____ bonds with water.

Correct Answer
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B