Question 1

Molecules that do not dissolve in water very easily are characteristically

Accepted Answer

A)  acids. 
B)  fats. 
C)  vitamins. 
D)  carbohydrates. 
A)  acids. 
B)  fats. 
C)  vitamins. 
D)  carbohydrates. B

Question 2

Which of the following is most likely a regulatory molecule?

Accepted Answer

A)  hair 
B)  muscle protein 
C)  steroid 
D)  calcium 
A)  hair 
B)  muscle protein 
C)  steroid 
D)  calcium C

Question 3

When four polypeptides are joined together by covalent bonds, they form a new, biologically active molecule that displays ____________ structure.

Accepted Answer

A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary D

Question 4

Which of these is a copy of DNA that is used to direct the synthesis of a specific protein?

Accepted Answer

A)  mRNA 
B)  rRNA 
C)  tRNA 
D)  ribosome 
A)  mRNA 
B)  rRNA 
C)  tRNA 
D)  ribosome

Question 5

In a nucleotide, the nitrogenous base is bonded to

Accepted Answer

A)  an acid. 
B)  a sugar. 
C)  a phosphate. 
D)  itself. 
A)  an acid. 
B)  a sugar. 
C)  a phosphate. 
D)  itself.

Question 6

Which of the following could be a fat?

Accepted Answer

A)  C2H5OH 
B)  C6H12O6 
C)  C2H5NO2 
D)  C51H97O6 
A)  C2H5OH 
B)  C6H12O6 
C)  C2H5NO2 
D)  C51H97O6

Question 7

Storage of energy is a MAJOR function of

Accepted Answer

A)  protein. 
B)  fats. 
C)  steroids. 
D)  nucleic acids. 
A)  protein. 
B)  fats. 
C)  steroids. 
D)  nucleic acids.

Question 8

So if I really want to know the details about my chances of arteriosclerosis I should be paying closest attention to my

Accepted Answer

A)  total amount of serum cholesterol. 
B)  RNA. 
C)  relative amounts of HDLs and LDLs. 
D)  total amount of VLDLs. 
A)  total amount of serum cholesterol. 
B)  RNA. 
C)  relative amounts of HDLs and LDLs. 
D)  total amount of VLDLs.

Question 9

A(n) ____ is a polymer.

Accepted Answer

A)  monosaccharide 
B)  amino acid 
C)  nucleotide 
D)  polypeptide 
A)  monosaccharide 
B)  amino acid 
C)  nucleotide 
D)  polypeptide

Question 10

An example of an inorganic molecule is

Accepted Answer

A)  CaCl2. 
B)  C2H6. 
C)  C2H5OH. 
D)  C3H5(OH)3. 
A)  CaCl2. 
B)  C2H6. 
C)  C2H5OH. 
D)  C3H5(OH)3.

Question 11

Which of the following rows correctly matches organic molecules with their subunits?

Accepted Answer

A)  Row 1 
B)  Row 2 
C)  Row 3 
D)  Row 4 
A)  Row 1 
B)  Row 2 
C)  Row 3 
D)  Row 4

Question 12

Organic molecules always

Accepted Answer

A)  contain carbon. 
B)  contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio. 
C)  are produced by living organisms. 
D)  dissolve in water. 
A)  contain carbon. 
B)  contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio. 
C)  are produced by living organisms. 
D)  dissolve in water.

Question 13

Which of the following is a function of proteins?

Accepted Answer

A)  Contain information for the cell. 
B)  Serve as a subunit in the structure of fat. 
C)  Reduce the weight of an individual. 
D)  Speed up certain chemical reactions. 
A)  Contain information for the cell. 
B)  Serve as a subunit in the structure of fat. 
C)  Reduce the weight of an individual. 
D)  Speed up certain chemical reactions.

Question 14

Which of these is responsible for carrying a specific amino acid to the ribosome during protein synthesis?

Accepted Answer

A)  DNA 
B)  mRNA 
C)  tRNA 
D)  ribosome 
A)  DNA 
B)  mRNA 
C)  tRNA 
D)  ribosome

Question 15

____ represent isomers.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 16

A fatty acid having double bonds between carbon atoms is a(n)

Accepted Answer

A)  phospholipid. 
B)  animal fat. 
C)  unsaturated fat. 
D)  saturated fat. 
A)  phospholipid. 
B)  animal fat. 
C)  unsaturated fat. 
D)  saturated fat.

Question 17

What role do chaperone proteins play?

Accepted Answer

A)  They make sure that nucleotides are in the right position. 
B)  Make sure that proteins are folded correctly. 
C)  Are caps on lipids. 
D)  Control the movement of water throughout the cell. 
A)  They make sure that nucleotides are in the right position. 
B)  Make sure that proteins are folded correctly. 
C)  Are caps on lipids. 
D)  Control the movement of water throughout the cell.

Question 18

glycerol + 3 fatty acids $\rightarrow$triglyceride + 3 H2O This is a(n) ____ reaction.

Accepted Answer

A)  hydrolysis 
B)  dehydration synthesis 
C)  unbalanced 
D)  acid-base 
A)  hydrolysis 
B)  dehydration synthesis 
C)  unbalanced 
D)  acid-base

Question 19

Which of the following statements about carbohydrates is INCORRECT?

Accepted Answer

A)  Carbohydrates are a good source of energy. 
B)  Carbohydrates contain approximately 2 hydrogens per carbon in the molecule. 
C)  Most carbohydrates dissolve in water. 
D)  Carbohydrates contain argon, carbon, hydrogen, and oxygen atoms. 
A)  Carbohydrates are a good source of energy. 
B)  Carbohydrates contain approximately 2 hydrogens per carbon in the molecule. 
C)  Most carbohydrates dissolve in water. 
D)  Carbohydrates contain argon, carbon, hydrogen, and oxygen atoms.

Question 20

Saturated fats differ from unsaturated fats in that saturated fats

Accepted Answer

A)  are longer. 
B)  lack carbon-carbon double bonds. 
C)  have fewer double bonds. 
D)  cannot be used for an energy source. 
A)  are longer. 
B)  lack carbon-carbon double bonds. 
C)  have fewer double bonds. 
D)  cannot be used for an energy source.

Exam 3: Organic Molecules: The Molecules of Life

Molecules that do not dissolve in water very easily are characteristically

Which of the following is most likely a regulatory molecule?

When four polypeptides are joined together by covalent bonds, they form a new, biologically active molecule that displays ____________ structure.

Which of these is a copy of DNA that is used to direct the synthesis of a specific protein?

In a nucleotide, the nitrogenous base is bonded to

Which of the following could be a fat?

Storage of energy is a MAJOR function of

So if I really want to know the details about my chances of arteriosclerosis I should be paying closest attention to my

A(n) ____ is a polymer.

An example of an inorganic molecule is

Which of the following rows correctly matches organic molecules with their subunits?

Organic molecules always

Which of the following is a function of proteins?

Which of these is responsible for carrying a specific amino acid to the ribosome during protein synthesis?

____ represent isomers.

A fatty acid having double bonds between carbon atoms is a(n)

What role do chaperone proteins play?

glycerol + 3 fatty acids →\rightarrow→ triglyceride + 3 H2O This is a(n) ____ reaction.

Which of the following statements about carbohydrates is INCORRECT?

Saturated fats differ from unsaturated fats in that saturated fats

What Is Biology

The Basics of Life: Chemistry

Cell Structure and Function

Enzymes, Coenzymes, and Energy

Biochemical Pathways: Cellular Respiration

Biochemical Pathways: Photosynthesis

DNA and RNA: The Molecular Basis of Heredity

Cell Division: Proliferation and Reproduction

Patterns of Inheritance

Applications of Biotechnology

Diversity Within Species and Population Genetics

Evolution and Natural Selection

The Formation of Species and Evolutionary Change

Ecosystem Dynamics: The Flow of Energy and Matter

Community Interactions

Population Ecology

Evolutionary and Ecological Aspects of Behavior

The Origin of Life and the Evolution of Cells

The Classification and Evolution of Organisms

The Nature of Microorganisms

The Plant Kingdom

The Animal Kingdom

Materials Exchange in the Body

Nutrition: Food and Diet

The Bodys Control Mechanisms and Immunity

Human Reproduction, Sex, and Sexuality

Filters

glycerol + 3 fatty acids $\rightarrow$ triglyceride + 3 H₂O This is a(n) ____ reaction.