Chapter 2: Chemistry Comes Alive

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1

The building blocks of RNA and DNA are ____________________.

nucleotides

2

The major function of carbohydrates is to supply the body with ____________________.

a readily and easily used source of energy

3

The mass number of an atom is

the sum of the masses of its protons and neutrons

4

Catabolic reactions involve ____________________.

release of energy.

5

All the following are non-polar molecules except ____________________.

water

6

Long, chain-like molecules made of many similar units are known as ____________________.

polymers

7

Ionic bonds form between two atoms when ____________________.

one atom donates an electron to the other atom.

8

Which molecule is the least polar?

carbon dioxide

9

Table salt (NaCl) is an example of a(n)

ionic bond

10

Starch is an example of a

polysaccharide