Question 1

Compare and contrast the chemical bonds between adjacent monomers in DNA, and between two strands of DNA.

Accepted Answer

The bonds holding monomers tog...

Question 2

When an enzyme reaches its saturation point, the amount of

Accepted Answer

A)   substrate for the enzyme to act upon is very high.
B)   substrate for the enzyme to act upon is very low.
C)   product produced continues to increase.
D)   product produced by the enzyme decreases.
E)   substrate for the enzyme to act upon is very low and the amount of product produced by the enzyme decreases.

Question 3

When two or more atoms are chemically linked, the smallest unit of the resulting material is referred to as a(n)

Accepted Answer

A)   atom.
B)   molecule.
C)   element.
D)   nucleus.
E)   tissue.

Question 4

Each of the following is a function of proteins EXCEPT one.Identify the exception.

Accepted Answer

A)   binding to ligands
B)   transport
C)   catalyst
D)   storage of genetic information
E)   carrying of messages

Question 5

What makes fats solid at room temperature? The more likely a fat is to be solid at room temperature the more it potentially can contribute to cardiovascular disease.With this in mind which fats will be the most dangerous?

Accepted Answer

The more saturated or the higher the num...

Question 6

HCl (hydrochloric acid) is considered an acid because

Accepted Answer

A)   in solution it donates its H⁺.
B)   in solution it decreases the concentration of free H⁺.
C)   in solution it increases the pH.
D)   it is similar to ammonia.
E)   it is able to form hydroxide ions.

Question 7

The molecule RNA contains the five-carbon sugar

Accepted Answer

A)   lactose.
B)   ribose.
C)   deoxyribose.
D)   glucose.
E)   uracil.

Question 8

Nucleotides participate in which of the following functions?

Accepted Answer

A)   They combine with oxygen to produce energy.
B)   They are the building blocks of proteins like cell receptors.
C)   They form structural elements in the cell membrane.
D)   They transfer energy and are part of genetic material.
E)   They store glucose as fat.

Question 9

The center of an atom is called the

Accepted Answer

A)   proton.
B)   molecule.
C)   element.
D)   nucleus.
E)   electron.

Question 10

A molecule of sucrose has a molecular weight of 342 Daltons.How many grams of sucrose would be required to make one liter of a 2.5 Molar solution of sucrose?

Accepted Answer

805 grams (per liter).This is ...

Question 11

List and briefly describe the seven categories of soluble proteins.

Accepted Answer

The seven categories: enzymes,...

Question 12

Write the chemical formula for the molecule drawn below.Which class of organic molecule does it belong to? Is it most likely polar or nonpolar?

Accepted Answer

C₁₁H₁₂N₂O₂.The presence of the...

Question 13

Lipids are considered hydrophobic because they easily dissolve in water.If True what allows them to dissolve in water or if not, what is it about their molecular structure that makes them less likely to dissolve in water?

Accepted Answer

A) True 
 B)False

Question 14

Lipids are hydrophobic, and do not usually dissolve in water.Because blood is water-based, the lipid cholesterol is combined with ________ so that it can be transported by blood.

Accepted Answer

A)   hydrophilic molecules
B)   hydrophobic molecules
C)   nothing; cholesterol is not transported in blood
D)   cations
E)   anions

Question 15

Isotopes of the same element differ by having different numbers of

Accepted Answer

A)   protons.
B)   neutrons.
C)   electrons.
D)   carbon atoms.
E)   double bonds.

Question 16

How many milliequivalents are represented by a mole of bicarbonate ions (HCO₃⁻)?

Accepted Answer

1000 milliequivalents.This is calculated...

Question 17

An element's ability to bind to and with other elements is determined by which of the following?

Accepted Answer

A)   the arrangement of electrons in the outer shell of an atom
B)   its amino acid composition
C)   its state of glycosylation
D)   the number of enzymes required
E)   the amount of folding in its subunits

Question 18

Which of the following elements combine to form nonpolar covalent bonds?

Accepted Answer

A)   carbon and hydrogen
B)   nitrogen and hydrogen
C)   sodium and chlorine
D)   hydrogen and oxygen
E)   carbon and chlorine

Question 19

What is the pH of a 0.005 M HCl solution? Assume complete dissociation.

Accepted Answer

pH = 2.3.If pH = - log [H⁺] an...

Question 20

Ionic bonds are considered to be strong chemical bonds.Yet, ions dissociate in water.Explain this apparent contradiction.

Accepted Answer

Molecules such as sodium chloride are bo...

Exam 2: Molecular Interactions

HCl (hydrochloric acid) is considered an acid because

Correct AnswerverifiedShow Answer

Compare and contrast the chemical bonds between adjacent monomers in DNA, and between two strands of DNA.

Correct AnswerverifiedThe bonds holding monomers tog...View AnswerShow Answer

Ionic bonds are considered to be strong chemical bonds.Yet, ions dissociate in water.Explain this apparent contradiction.

Correct AnswerverifiedMolecules such as sodium chloride are bo...View AnswerShow Answer

Lipids are hydrophobic, and do not usually dissolve in water.Because blood is water-based, the lipid cholesterol is combined with ________ so that it can be transported by blood.

Correct AnswerverifiedShow Answer

Which of the following elements combine to form nonpolar covalent bonds?

Correct AnswerverifiedShow Answer

Write the chemical formula for the molecule drawn below.Which class of organic molecule does it belong to? Is it most likely polar or nonpolar?

Correct AnswerverifiedC₁₁H₁₂N₂O₂.The presence of the...View AnswerShow Answer

The molecule RNA contains the five-carbon sugar

Correct AnswerverifiedShow Answer

The center of an atom is called the

Correct AnswerverifiedShow Answer

When two or more atoms are chemically linked, the smallest unit of the resulting material is referred to as a(n)

Correct AnswerverifiedShow Answer

What makes fats solid at room temperature? The more likely a fat is to be solid at room temperature the more it potentially can contribute to cardiovascular disease.With this in mind which fats will be the most dangerous?

Correct AnswerverifiedThe more saturated or the higher the num...View AnswerShow Answer

A molecule of sucrose has a molecular weight of 342 Daltons.How many grams of sucrose would be required to make one liter of a 2.5 Molar solution of sucrose?

Correct Answerverified805 grams (per liter).This is ...View AnswerShow Answer

What is the pH of a 0.005 M HCl solution? Assume complete dissociation.

Correct AnswerverifiedpH = 2.3.If pH = - log [H⁺] an...View AnswerShow Answer

Lipids are considered hydrophobic because they easily dissolve in water.If True what allows them to dissolve in water or if not, what is it about their molecular structure that makes them less likely to dissolve in water?

Correct AnswerverifiedShow Answer

Nucleotides participate in which of the following functions?

Correct AnswerverifiedShow Answer

When an enzyme reaches its saturation point, the amount of

Correct AnswerverifiedShow Answer

How many milliequivalents are represented by a mole of bicarbonate ions (HCO₃⁻)?

Correct Answerverified1000 milliequivalents.This is calculated...View AnswerShow Answer

List and briefly describe the seven categories of soluble proteins.

Correct AnswerverifiedThe seven categories: enzymes,...View AnswerShow Answer

Each of the following is a function of proteins EXCEPT one.Identify the exception.

Correct AnswerverifiedShow Answer

Isotopes of the same element differ by having different numbers of

Correct AnswerverifiedShow Answer

An element's ability to bind to and with other elements is determined by which of the following?

Correct AnswerverifiedShow Answer

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Correct Answer
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The bonds holding monomers tog...
View Answer

Correct Answer
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Molecules such as sodium chloride are bo...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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C₁₁H₁₂N₂O₂.The presence of the...
View Answer

Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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The more saturated or the higher the num...
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Correct Answer
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805 grams (per liter).This is ...
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Correct Answer
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pH = 2.3.If pH = - log [H⁺] an...
View Answer

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
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1000 milliequivalents.This is calculated...
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Correct Answer
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The seven categories: enzymes,...
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Correct Answer
verified

Correct Answer
verified

Correct Answer
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