chap 2 quiz ?s

Question 1

what are the properties of water?

Answer 1

water is an excellent solvent
water participates in chemical reactions
water absorbs and releases heat very slowly
water requires a large amount of heat to change from a liquid to a gas
water serves as a lubricant

Question 2

Can donate protons to a solution

Answer 2

proton

Question 3

Can donate protons to a solution

Answer 3

acid

Question 4

pH lower than 7

Answer 4

acid

Question 5

pH higher than 7

Answer 5

base

Question 6

Solution with a high concentration of protons (hydrogen ions)

Answer 6

base

Question 7

Solution with a high concentration of protons (hydrogen ions)

Answer 7

acid

Question 8

The mass number of an atom is determined by:

Answer 8

adding the total number of protons and neutrons.

Question 9

An abundant element found in water and most organic molecules is

Answer 9

hydrogen

Question 10

The storage form of glucose in the liver is

Answer 10

glycogen

Question 11

Match the chemical reaction with its description.

A molecule splitting apart

Answer 11

decomposition

Question 12

Match the chemical reaction with its description.

Two molecules rearranging their atoms to form two new molecules

Answer 12

exchange reaction

Question 13

The backbone of organic molecules is formed by

Answer 13

oxygen.
nitrogen.
magnesium.
carbon.
hydrogen. no

Question 14

A chemical bond where electrons are taken from one atom and given to another is a(n)

Answer 14

ionic bond

Question 15

For the statement below, identify whether it is true or false.
Carbohydrates are composed of carbon, hydrogen, and nitrogen.

Answer 15

false / oxygen not nitrogen

Question 16

A molecule that dissociates in water and gives off hydrogen ions is a(n)

Answer 16

acid

Question 17

The backbone of organic molecules is formed by

Answer 17

oxygen.
nitrogen.
magnesium.
* ** carbon.
hydrogen. no

Question 18

Which of the following is NOT a base found in DNA

Answer 18

Uracil is not / Guanine, adenine, Cytosine, and Thymine are

Question 19

For the statement below, identify whether it is true or false. If false, identify the word that makes the statement incorrect. If the statement is true, select “Statement is true” from the second dropdown.
True or False: True

Answer 19

True or False: True

Incorrect Word: Statement is true.

Question 20

All of the following are organic compounds EXCEPT

Answer 20

lipids.
proteins.
water. is not
nucleic acids.
carbohydrates.

Question 21

All of the following are organic compounds EXCEPT

Answer 21

lipids.
proteins.
water. is not
nucleic acids.
carbohydrates.

Question 22

prevent rapid, drastic changes in the PH of a body fluid by converting strong acids and bases into weak acids and bases.

Answer 22

buffers

Question 23

prevent rapid, drastic changes in the PH of a body fluid by converting strong acids and bases into weak acids and bases.

Answer 23

buffers

Question 24

the sum of all chemical reactions in the body is called

Answer 24

metabolism