Question 1

A heavy-metal ion may disrupt the functioning of an enzyme because:

Accepted Answer

A) substrates bond to the metal ion 
B) a metal ion may change the shape of the active site 
C) metal ions raise the pH of cellular fluid 
D) metal ions displace enzymes in intracellular fluid 
A) substrates bond to the metal ion 
B) a metal ion may change the shape of the active site 
C) metal ions raise the pH of cellular fluid 
D) metal ions displace enzymes in intracellular fluid

Question 2

Which statement is NOT true of the elements in the human body?

Accepted Answer

A) Calcium is necessary for blood clotting. 
B) Potassium is needed for nerve-impulse transmission. 
C) Sulfur is part of some carbohydrates. 
D) Vitamin B12 contains cobalt. 
A) Calcium is necessary for blood clotting. 
B) Potassium is needed for nerve-impulse transmission. 
C) Sulfur is part of some carbohydrates. 
D) Vitamin B12 contains cobalt.

Question 3

Which statement is NOT true of the subunits of organic molecules?

Accepted Answer

A) Glycogen is made of glucose. 
B) Glycerol is found in true fats and in diglycerides. 
C) DNA subunits are called deoxyprecursors. 
D) The subunits of enzymes are amino acids. 
A) Glycogen is made of glucose. 
B) Glycerol is found in true fats and in diglycerides. 
C) DNA subunits are called deoxyprecursors. 
D) The subunits of enzymes are amino acids.

Question 4

The raw materials,or reactants,of cell respiration are:

Accepted Answer

A) glucose and oxygen 
B) water and glucose 
C) oxygen and carbon dioxide 
D) carbon dioxide and glucose 
A) glucose and oxygen 
B) water and glucose 
C) oxygen and carbon dioxide 
D) carbon dioxide and glucose

Question 5

For cobalt,copper,calcium,and carbon,the correct chemical symbols,in order,are:

Accepted Answer

A) Cb,Co,Ca,C 
B) Co,Cp,Ca,Cr 
C) Cb,Cu,Cm,C 
D) Co,Cu,Ca,C 
A) Cb,Co,Ca,C 
B) Co,Cp,Ca,Cr 
C) Cb,Cu,Cm,C 
D) Co,Cu,Ca,C

Question 6

The disaccharides are sugars that:

Accepted Answer

A) will be digested and used for energy,such as sucrose 
B) will become part of DNA and RNA 
C) will be digested for energy,such as fructose 
D) are part of specialized enzymes 
A) will be digested and used for energy,such as sucrose 
B) will become part of DNA and RNA 
C) will be digested for energy,such as fructose 
D) are part of specialized enzymes

Question 7

The bonds that hold the two chains of an insulin molecule together are:

Accepted Answer

A) disulfide bonds 
B) peptide bonds 
C) ionic bonds 
D) protein bonds 
A) disulfide bonds 
B) peptide bonds 
C) ionic bonds 
D) protein bonds

Question 8

A synthesis reaction involves:

Accepted Answer

A) the formation of bonds 
B) the breaking of bonds 
C) the release of energy 
D) the creation of smaller molecules 
A) the formation of bonds 
B) the breaking of bonds 
C) the release of energy 
D) the creation of smaller molecules

Question 9

Vitamin D may be synthesized in the body from:

Accepted Answer

A) amino acids 
B) phospholipids 
C) cholesterol 
D) disaccharides 
A) amino acids 
B) phospholipids 
C) cholesterol 
D) disaccharides

Question 10

The carbohydrates that are part of DNA and RNA are:

Accepted Answer

A) glucose 
B) starch 
C) pentose sugars 
D) oligosaccharides 
A) glucose 
B) starch 
C) pentose sugars 
D) oligosaccharides

Question 11

When a buffer system forms a weak acid from a strong acid:

Accepted Answer

A) the pH is lowered only slightly,instead of greatly 
B) the pH is raised only slightly,instead of greatly 
C) the pH is raised only slightly,because more hydrogen ions are produced 
D) all of these are possible,depending on the particular reaction 
A) the pH is lowered only slightly,instead of greatly 
B) the pH is raised only slightly,instead of greatly 
C) the pH is raised only slightly,because more hydrogen ions are produced 
D) all of these are possible,depending on the particular reaction

Question 12

The self antigens on cell membranes are:

Accepted Answer

A) starch 
B) pentose sugars 
C) glucose 
D) oligosaccharides 
A) starch 
B) pentose sugars 
C) glucose 
D) oligosaccharides

Question 13

A large organic molecule made of the elements C,H,O,N,and S would most likely be a:

Accepted Answer

A) nucleic acid 
B) polysaccharide 
C) protein 
D) true fat 
A) nucleic acid 
B) polysaccharide 
C) protein 
D) true fat

Question 14

Which of these is NOT a disaccharide?

Accepted Answer

A) sucrose 
B) galactose 
C) maltose 
D) lactose 
A) sucrose 
B) galactose 
C) maltose 
D) lactose

Question 15

Large molecules of true fats are made of the smaller subunits called:

Accepted Answer

A) fatty acids and glucose 
B) fatty acids and glycerol 
C) amino acids 
D) nucleotides 
A) fatty acids and glucose 
B) fatty acids and glycerol 
C) amino acids 
D) nucleotides

Question 16

Intracellular fluid is found:

Accepted Answer

A) within cells 
B) between cells 
C) both A and B 
D) both A and B,and in tissue spaces 
A) within cells 
B) between cells 
C) both A and B 
D) both A and B,and in tissue spaces

Question 17

The function of DNA is to:

Accepted Answer

A) be the genetic code within cells 
B) serve as the site of protein synthesis 
C) both A and B 
D) both A and B,and form chromosomes 
A) be the genetic code within cells 
B) serve as the site of protein synthesis 
C) both A and B 
D) both A and B,and form chromosomes

Question 18

All enzymes are:

Accepted Answer

A) carbohydrates 
B) lipids 
C) proteins 
D) steroids 
A) carbohydrates 
B) lipids 
C) proteins 
D) steroids

Question 19

Which statement is NOT true of ions?

Accepted Answer

A) An ion has either a positive or negative charge. 
B) Atoms become ions by gaining or losing protons. 
C) Ions with unlike charges are attracted to one another and form ionic bonds. 
D) An atom that loses an electron will have a charge of +1. 
A) An ion has either a positive or negative charge. 
B) Atoms become ions by gaining or losing protons. 
C) Ions with unlike charges are attracted to one another and form ionic bonds. 
D) An atom that loses an electron will have a charge of +1.

Question 20

The genetic material (genetic code)within cells is:

Accepted Answer

A) enzymes 
B) RNA 
C) DNA 
D) phospholipids 
A) enzymes 
B) RNA 
C) DNA 
D) phospholipids

Exam 3:Some Basic Chemistry-Part C

A heavy-metal ion may disrupt the functioning of an enzyme because:

Which statement is NOT true of the elements in the human body?

Which statement is NOT true of the subunits of organic molecules?

The raw materials,or reactants,of cell respiration are:

For cobalt,copper,calcium,and carbon,the correct chemical symbols,in order,are:

The disaccharides are sugars that:

The bonds that hold the two chains of an insulin molecule together are:

A synthesis reaction involves:

Vitamin D may be synthesized in the body from:

The carbohydrates that are part of DNA and RNA are:

When a buffer system forms a weak acid from a strong acid:

The self antigens on cell membranes are:

A large organic molecule made of the elements C,H,O,N,and S would most likely be a:

Which of these is NOT a disaccharide?

Large molecules of true fats are made of the smaller subunits called:

Intracellular fluid is found:

The function of DNA is to:

All enzymes are:

Which statement is NOT true of ions?

The genetic material (genetic code)within cells is:

Organization and General Plan of the Body-Part A

Organization and General Plan of the Body-Part B

Organization and General Plan of the Body-Part C

Some Basic Chemistry-Part A

Some Basic Chemistry-Part B

Cells-Part A

Cells-Part B

Cells-Part C

Tissues and Membranes-Part A

Tissues and Membranes-Part B

Tissues and Membranes-Part C

The Integumentary System-Part A

The Integumentary System-Part B

The Integumentary System-Part C

The Skeletal System-Part A

The Skeletal System-Part B

The Skeletal System-Part C

The Muscular System-Part A

The Muscular System-Part B

The Muscular System-Part C

The Nervous System-Part A

The Nervous System-Part B

The Nervous System-Part C

The Senses-Part A

The Senses-Part B

The Senses-Part C

The Endocrine System-Part A

The Endocrine System-Part B

The Endocrine System-Part C

Blood-Part A

Blood-Part B

Blood-Part C

The Heart-Part A

The Heart-Part B

The Heart-Part C

The Vascular System-Part A

The Vascular System-Part B

The Vascular System-Part C

The Lymphatic System and Immunity-Part A

The Lymphatic System and Immunity-Part B

The Lymphatic System and Immunity-Part C

The Respiratory System-Part A

The Respiratory System-Part B

The Respiratory System-Part C

The Digestive System-Part A

The Digestive System-Part B

The Digestive System-Part C

Body Temperature and Metabolism-Part A

Body Temperature and Metabolism-Part B

Body Temperature and Metabolism-Part C

The Urinary System-Part A

The Urinary System-Part B

The Urinary System-Part C

Fluid–Electrolyte and Acid–Base Balance-Part A

Fluid–Electrolyte and Acid–Base Balance-Part B

Fluid–Electrolyte and Acid–Base Balance-Part C

The Reproductive Systems-Part A

The Reproductive Systems-Part B

The Reproductive Systems-Part C