Quiz 2

Question 1

Which of the following statements about the atom ¹²₆C is FALSE?

Its atomic number is 6.

It has 12 neutrons in its nucleus.

Its atomic weight is 12.

It has 6 electrons orbiting the nucleus.

It has 6 protons in its nucleus.

Answer 1

It has 12 neutrons in its nucleus.

Question 2

What type of reaction is represented by the equation below?

AB → A + B

Answer 2

decomposition reaction

Question 3

Which type of molecule is composed of (CH₂O) units?

Answer 3

carbohydrate

Question 4

What is the type of bond holding hydrogen and oxygen atoms together in a single H₂O molecule?

Answer 4

covalent bond

Question 5

Which are the primary molecules making up plasma membranes in cells?

Answer 5

lipids

Question 6

What do genes consist of?

Answer 6

nucleic acids

Question 7

Which of the following is the type of bond between molecules of water in a beaker of water?

hydrogen bond

ionic bond

covalent bond

Answer 7

hydrogen bond

Question 8

What is the type of strong chemical bond between carbon, hydrogen, and oxygen atoms in a single organic molecule?

Answer 8

covalent bond

Question 9

Gastric juices have a pH of 1 or 2. This would indicate which of the following?

Answer 9

numerous H+ ions and a low pH