Chapter 2

Question 1

What are the two subdivisions of energy?

Answer 1

Potential and Kinetic Energy

Question 2

True or False. Potential energy is stored energy.

Answer 2

TRUE

Question 3

It is the unique number of protons in each atom of the element.

Answer 3

Atomic number

Question 4

How many electrons in its valence shell has a stronger electronegativity.

Answer 4

8

Question 5

True or False. Dissociation is the separation of ions in an ionic compound by water molecules.

Answer 5

True.

Question 6

What is a weak chemical bond that provides the three dimensional structure of large molecules like proteins and DNA?

Answer 6

Hydrogen Bonds

Question 7

Glycogen and starch are examples of a specific category of carbohydrates called ________.

Answer 7

Polysaccharides

Question 8

The three Major Parts of cell

Answer 8

Cell membrane / Plasma membrane Cytoplasm
Nucleus

Question 9

Name the three subatomic particles

Answer 9

Protons
Neutrons
Electrons

Question 10

It is a two-dimensional representation of electron cloud.

Answer 10

Electron Shell

Question 11

Enumerate the three major types of chemical bonds.

Answer 11

Ionic
Covalent
Hydrogen

Question 12

An ______ is a protein that catalyzes biochemical reactions.

Answer 12

Enzyme

Question 13

Anything that has mass and takes up space.

Answer 13

Matter

Question 14

It is the amount of energy needed to start a reaction.

Answer 14

Activation Energy

Question 15

The nucleus is surrounded by what subatomic particles?

Answer 15

Electrons

Question 16

A reaction has a positive delta G. This means…

Answer 16

It is endergonic

Question 17

It is formed when two or more atoms are chemically combine to form a structure.

Answer 17

Molecule

Question 18

Sex cells necessary for reproduction are called…

Answer 18

Meiosis

Question 19

A highly viscous substance enclosed within the cell membrane

Answer 19

Cytoplasm

Question 20

Account for over 50 percent of the organic matter in the body and have the most varied function of the organic molecules. Some are construction materials; others play vital roles in cell function.

Answer 20

Protein

Question 21

The most common element in the human body is _________.

Answer 21

OXYGEN

Question 22

A combination of a composition reaction and a synthesis reaction.

Answer 22

Exchange reaction

Question 23

True or False. Cation are positively charged ions.

Answer 23

TRUE.

Question 24

What is the most abundant gas in the human body?

Answer 24

Nitrogen

Question 25

All of the reactions that are at one time occuring.

Answer 25

Metabolism

Question 26

Contains the cell’s genetic material.

Answer 26

Nucleus

Question 27

Produce secretions that create an environment unsuitable for some microorganisms.

Answer 27

Gland

Question 28

The amount of reactants relative to the amount of products remains constant.

Answer 28

Equilibrium

Question 29

What is compound?

Answer 29

Two or more different types of atoms combined.

Question 30

What is the simplest type of matter having unique chemical properties?

Answer 30

Element

Question 31

These are substances that dissolve in nonpolar solvents, such as alcohol or acetone, but not in polar solvents, such as water

Answer 31

Lipids

Question 32

Enumerate the four main protein shapes.

Answer 32

• Primary Structure
• Secondary Structure
• Tertiary Structure
• Quaternary Structure

Question 33

This acts as a barrier on the surface of the water and allows insects to walk on the surface of the water.

Answer 33

SURFACE TENSION

Question 34

When an atom donates an electron to another atom, it becomes…

Answer 34

An ion

Question 35

It is a compound that contains carbon and hydrogen as their primary structural component (Llorin)

Answer 35

Organic compound

Question 36

_______ are basically flat molecules formed of four interlocking rings; thus their structure differs quite a bit from that of fats.

Answer 36

Steroids