Question 1

Prions are known to cause

Accepted Answer

A)   mad cow disease.
B)   herpes.
C)   sickle cell anemia.
D)   the common cold.E) All of the above
F) A) and D)

Question 2

The group of biological molecules that are most diverse in function is

Accepted Answer

A)   proteins.
B)   lipids.
C)   carbohydrates.
D)   nucleic acids.E) A) and D)
F) B) and C)

Question 3

How do two amino acids, such as lysine and methionine, differ from each other?

Accepted Answer

They have ...

Question 4

Which of these is NOT a nucleic acid or nucleotide?

Accepted Answer

A)   ATP
B)   DNA
C)   LDL
D)   RNAE) All of the above
F) C) and D)

Question 5

You are telling your friend that organic molecules are all made up of carbon backbones with hydrogens. She doesnʹt understand how there can be so many different organic molecules if they all are made up of the same basic components. You explain that organic molecules

Accepted Answer

A)   vary because they possess different functional groups.
B)   are different because of the different types of hydrogen bonds that form.
C)   vary because they possess different isotopes of carbon.
D)   actually all have the same structure but differ in the number of electrons.E) All of the above
F) None of the above

Question 6

The fat substitute Olestra contains a sucrose backbone with six to eight fatty acids attached. How is this different from a naturally occurring fat?

Accepted Answer

A)   Naturally occurring fats contain a glycerol and three fatty acids.
B)   Naturally occurring fats contain a sucrose backbone and three fatty acid chains.
C)   It isnʹt; Olestra and natural fats have the same structure, just different tastes.
D)   Naturally occurring fats contain a glycerol, two fatty acids, and a phosphate group.E) A) and B)
F) C) and D)

Question 7

In humans, dental cavities form when Streptococcus mutans bacteria in the mouth hydrolyze sucrose. Which of the following is (are)  the products of this reaction?

Accepted Answer

A)   Glucose and fructose
B)   Glucose and galactose
C)   Glycogen
D)   StarchE) All of the above
F) A) and B)

Question 8

Cell membranes are an example of a lipid bilayer. In this lipid bilayer, both the outside of the cell and the inside of the cell are in nature.

Accepted Answer

A)   charged
B)   hydrophobic
C)   polar
D)   hydrophilic
E)   wateryF) A) and D)
G) A) and C)

Question 9

Which of the following can serve as an energy source and as structural support in plant cells?

Accepted Answer

A)   Carbohydrates
B)   Lipids
C)   Proteins
D)   Nucleic acidsE) A) and D)
F) All of the above

Question 10

Which of the following refers to the amino acid sequence of proteins?

Accepted Answer

A)   Primary
B)   Secondary
C)   Tertiary
D)   QuaternaryE) A) and B)
F) B) and C)

Question 11

Triglycerides are

Accepted Answer

A)   always composed of carbon rings.
B)   polymers of amino acids.
C)   hydrophilic.
D)   a main component of cellular membranes.
E)   made from glycerol and fatty acids.F) B) and C)
G) B) and D)

Question 12

Which of these biological molecules contain genetic information?

Accepted Answer

A)   Lipids
B)   Carbohydrates
C)   Proteins
D)   Nucleic acidsE) B) and C)
F) C) and D)

Question 13

If digestion_________ is , then synthesis is _________.

Accepted Answer

A)   inorganic; organic
B)   hydrolysis; dehydration synthesis
C)   dehydration synthesis; hydrolysis
D)   organic; inorganicE) A) and D)
F) A) and C)

Question 14

Soap and detergent molecules have a long, hydrophobic tail and a polar, hydrophilic head. They are sometimes referred to as bridge molecules because they allow oils and fats to be suspended and dissolved in water (which they otherwise would not be able to do) . Imagine that you are using soap to wash away dirt that is being held against your skin in an oily film.
-In this scenario, how are the soap, dirt/oil, and water arranged at the molecular level?

Accepted Answer

A)   The soap molecules encase the dirt/oil within a small droplet that has a hydrophilic exterior and a hydrophobic interior.
B)   Water and dirt/oil form covalent bonds inside a small droplet that has a soap -based outer membrane.
C)   The soap is converted into a lipid that binds to the dirt/oil while repelling the water.
D)   The soap molecules encase the dirt/oil within a small droplet that has a hydrophobic exterior and a hydrophilic interior.E) All of the above
F) A) and B)

Question 15

As shown in this figure, the valine and lysine in this protein are linked by covalent bonds within the_________ structure, whereas the hydrogen bonds hold together molecules within the helical _________structure.

Accepted Answer

A)   primary; secondary
B)   primary; tertiary
C)   secondary; tertiary
D)   secondary; quaternary
E)   tertiary; quaternaryF) A) and D)
G) B) and C)

Question 16

A denatured protein differs from a normal protein because it

Accepted Answer

A)   is composed of nucleotides.
B)   does not contain amino acids.
C)   contains many disulfide bonds.
D)   has lost its usual secondary and tertiary structures.E) None of the above
F) A) and B)

Question 17

A nucleotide is made of a

Accepted Answer

A)   phosphate, protein, and nitrogenous base.
B)   phospholipid, sugar, and protein.
C)   phosphate, sugar, and nitrogenous base.
D)   phospholipid, sugar, and nitrogenous base.E) C) and D)
F) B) and C)

Question 18

Which type of lipid is most important in biological membranes?

Accepted Answer

A)   Fat
B)   Steroid
C)   Oil
D)   Phospholipid
E)   WaxF) B) and E)
G) A) and C)

Question 19

Which of the following correctly matches an organic polymer with its monomers, respectively?

Accepted Answer

A)   Lipid; steroids
B)   DNA; ATP
C)   Carbohydrate; polysaccharides
D)   Protein; amino acids
E)   Hydrocarbon; monosaccharidesF) B) and D)
G) A) and D)

Question 20

Which of the following is an example of a protein?

Accepted Answer

A)   Cellulose
B)   Estrogen
C)   Keratin
D)   ATPE) A) and B)
F) A) and C)

Exam 3: Biological Molecules

Which of these biological molecules contain genetic information?

Correct Answer
verified

You are telling your friend that organic molecules are all made up of carbon backbones with hydrogens. She doesnʹt understand how there can be so many different organic molecules if they all are made up of the same basic components. You explain that organic molecules

Correct Answer
verified

Which of these is NOT a nucleic acid or nucleotide?

Correct Answer
verified

Correct Answer
verified

Triglycerides are

Correct Answer
verified

Cell membranes are an example of a lipid bilayer. In this lipid bilayer, both the outside of the cell and the inside of the cell are in nature.

Correct Answer
verified

The fat substitute Olestra contains a sucrose backbone with six to eight fatty acids attached. How is this different from a naturally occurring fat?

Correct Answer
verified

Which of the following refers to the amino acid sequence of proteins?

Correct Answer
verified

A nucleotide is made of a

Correct Answer
verified

Which of the following correctly matches an organic polymer with its monomers, respectively?

Correct Answer
verified

As shown in this figure, the valine and lysine in this protein are linked by covalent bonds within the_ structure, whereas the hydrogen bonds hold together molecules within the helical _structure.

Correct Answer
verified

The group of biological molecules that are most diverse in function is

Correct Answer
verified

Which of the following can serve as an energy source and as structural support in plant cells?

Correct Answer
verified

A denatured protein differs from a normal protein because it

Correct Answer
verified

In humans, dental cavities form when Streptococcus mutans bacteria in the mouth hydrolyze sucrose. Which of the following is (are) the products of this reaction?

Correct Answer
verified

Which type of lipid is most important in biological membranes?

Correct Answer
verified

How do two amino acids, such as lysine and methionine, differ from each other?

Correct Answer
verified
They have ...
View Answer

Which of the following is an example of a protein?

Correct Answer
verified

If digestion_ is , then synthesis is _.

Correct Answer
verified

Prions are known to cause

Correct Answer
verified

Exam 3: Biological Molecules

Which of these biological molecules contain genetic information?

Correct AnswerverifiedShow Answer

You are telling your friend that organic molecules are all made up of carbon backbones with hydrogens. She doesnʹt understand how there can be so many different organic molecules if they all are made up of the same basic components. You explain that organic molecules

Correct AnswerverifiedShow Answer

Which of these is NOT a nucleic acid or nucleotide?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Triglycerides are

Correct AnswerverifiedShow Answer

Cell membranes are an example of a lipid bilayer. In this lipid bilayer, both the outside of the cell and the inside of the cell are in nature.

Correct AnswerverifiedShow Answer

The fat substitute Olestra contains a sucrose backbone with six to eight fatty acids attached. How is this different from a naturally occurring fat?

Correct AnswerverifiedShow Answer

Which of the following refers to the amino acid sequence of proteins?

Correct AnswerverifiedShow Answer

A nucleotide is made of a

Correct AnswerverifiedShow Answer

Which of the following correctly matches an organic polymer with its monomers, respectively?

Correct AnswerverifiedShow Answer

As shown in this figure, the valine and lysine in this protein are linked by covalent bonds within the_________ structure, whereas the hydrogen bonds hold together molecules within the helical _________structure.

Correct AnswerverifiedShow Answer

The group of biological molecules that are most diverse in function is

Correct AnswerverifiedShow Answer

Which of the following can serve as an energy source and as structural support in plant cells?

Correct AnswerverifiedShow Answer

A denatured protein differs from a normal protein because it

Correct AnswerverifiedShow Answer

In humans, dental cavities form when Streptococcus mutans bacteria in the mouth hydrolyze sucrose. Which of the following is (are) the products of this reaction?

Correct AnswerverifiedShow Answer

Which type of lipid is most important in biological membranes?

Correct AnswerverifiedShow Answer

How do two amino acids, such as lysine and methionine, differ from each other?

Correct AnswerverifiedThey have ...View AnswerShow Answer

Which of the following is an example of a protein?

Correct AnswerverifiedShow Answer

If digestion_________ is , then synthesis is _________.

Correct AnswerverifiedShow Answer

Prions are known to cause

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

As shown in this figure, the valine and lysine in this protein are linked by covalent bonds within the_ structure, whereas the hydrogen bonds hold together molecules within the helical _structure.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
They have ...
View Answer

Correct Answer
verified

If digestion_ is , then synthesis is _.

Correct Answer
verified

Correct Answer
verified