Question 1

The waste product of cell respiration is:

Accepted Answer

A) carbon dioxide 
B) water 
C) ATP 
D) heat

Question 2

An anion has:

Accepted Answer

A) a positive charge 
B) a negative charge 
C) a neutral charge 
D) none of these,because the charge may vary

Question 3

Large changes in the pH of blood are prevented by chemicals called ____________________.

Accepted Answer

The answer of Large changes in the pH of blood...

Question 4

Which statement is NOT true of ionic bonds?

Accepted Answer

A) They form salts. 
B) In the solid state,they are very strong. 
C) In water,many ionic bonds weaken. 
D) They involve the sharing of electrons.

Question 5

If body fluids are becoming too acidic,this means that there are excess ____ ions in the fluid.

Accepted Answer

A) sodium 
B) potassium 
C) hydroxyl 
D) hydrogen

Question 6

A heavy metal ion may exert toxic effects by blocking the ____________________ of enzymes.

Accepted Answer

The answer of A heavy metal ion may exert toxic...

Question 7

A reaction in which smaller molecules are bonded to form larger ones is called a:

Accepted Answer

A) composition reaction 
B) synthesis reaction 
C) thesis reaction 
D) decomposition reaction

Question 8

Two elements that are necessary for cell respiration are:

Accepted Answer

A) sodium and potassium 
B) calcium and phosphorus 
C) iodine and sulfur 
D) iron and copper

Question 9

The name for the water within cells is ____________________.

Accepted Answer

The answer of The name for the water within cells...

Question 10

The pentose sugars are part of:

Accepted Answer

A) starches 
B) DNA and RNA 
C) specialized enzymes 
D) cell membranes

Question 11

Which of the following statements are true of the functions of organic molecules? (Read carefully and select all of the correct statements.)

Accepted Answer

A) True fats are energy-storage molecules. 
B) Glycogen forms structural components of cells,such as membranes. 
C) Pentose sugars are part of polysaccharides. 
D) DNA is the genetic code in chromosomes. 
E) Phospholipids are part of cell membranes.
F)Cholesterol is the precursor molecule for a hormone such as insulin.
G)Oligosaccharides form antigens on cell membranes.
H)Cellulose is made of glucose and is a source of energy.

Question 12

Which statement is NOT true of cell respiration?

Accepted Answer

A) It is the link between eating and breathing. 
B) The water produced must be excreted or the cell will burst. 
C) One of the energy products is heat. 
D) ATP is biologically useful energy.

Question 13

An ionic bond is formed when:

Accepted Answer

A) an atom of sodium loses an electron to another atom of sodium 
B) an atom of sodium shares two electrons with two atoms of chlorine 
C) an atom of sodium gains an electron from an atom of chlorine 
D) an atom of sodium loses an electron to an atom of chlorine

Question 14

The chemical formula for glucose is:

Accepted Answer

A) C12H6O12 
B) C12H6O6 
C) C6H6O6 
D) C6H12O6

Question 15

The term dissociation refers to:

Accepted Answer

A) ionic bonds 
B) the breaking of bonds in a water solution 
C) both A and B 
D) both A and B and covalent bonds

Question 16

For the elements potassium and phosphorus,the chemical symbols are ____________________ and ____________________.

Accepted Answer

The answer of For the elements potassium and phosphorus,the chemical...

Question 17

The raw materials of cell respiration are ____________________ and ____________________.

Accepted Answer

The answer of The raw materials of cell respiration are...

Question 18

The subunits of proteins are molecules called ____________________.

Accepted Answer

The answer of The subunits of proteins are molecules called...

Question 19

The undigested part of food that promotes peristalsis is:

Accepted Answer

A) cholesterol 
B) cellulose 
C) true fats 
D) proteins

Question 20

A decrease in pH may disrupt the functioning of an enzyme because:

Accepted Answer

A) the enzyme must help out the bicarbonate buffer system 
B) the active site becomes clogged with excess water 
C) the substrate fits into the active site but cannot get out 
D) excess hydrogen ions may block the active site

Exam 2: Some Basic Chemistry