21-30

Question 0

Forms when electrons are shared between atoms.

Answer 0

Covalent bond

Question 1

Formed when one or more electrons are transferred from one atom to another.

Answer 1

Ionic bond

Question 2

The electrons in the outer shell or energy level that are available for bonding.

Answer 2

Valence electrons

Question 3

The measure of acidity or alkalinity of a solution.

Answer 3

pH

Question 4

A substance that dissolves in water to release a hydrogen ion. (H+)

Answer 4

Acid

Question 5

A substance that dissolves in water to release a hydroxide ion. (OH-)

Answer 5

Base

Question 6

The nucleic acid that contains all genetic information for a cell.

Answer 6

Deoxyribonucleic Acid (DNA)

Question 7

The shape of DNA that resembles a spiral staircase or a twisted ladder.

Answer 7

Double helix

Question 8

The building block of living organisms that passes genetic

information from one generation to the next. (e.g. DNA)

Answer 8

Nucleic acid

Question 9

A monomer of nucleic acid; consisting of a sugar, phosphate, and a
nitrogen base. (e.g. A,T,G,C)

Answer 9

Nucleotide