Chapter 2

Front 1

Which of the following is an example of an inorganic molecule?

Back 1

Sodium chloride

Front 2

Water is used for in body processes because

Back 2

It is a good solvent

Front 3

Starch is an example of an

Back 3

Polysaccharide

Front 4

The joining of nucleotide molecules to form a more complex nucleic acid is an example of

Back 4

Synthesis reaction

Front 5

Which of the following substances below is matched with its correct organic group

Back 5

Enzymes-proteins

Front 6

Which of the following statements about enzymes is true

Back 6

They are biological catalyst

Front 7

Antibodies

Back 7

Are highly specialized proteins that recognize bind with and inactivate bacteria toxins and viruses.

Front 8

Which of the following statements about RNA is true

Back 8

RNA is single stranded

Front 9

Energy that is directly involved in moving matter is termed

Back 9

Mechanical energy

Front 10

The most abundant element in the human body is

Back 10

Oxygen

Front 11

Ninety-six percent of the human body is composed of the elements

Back 11

Carbon oxygen hydrogen and nitrogen

Front 12

The simplest atom containing one proton and one electron and no neutrons is

Back 12

Hydrogen

Front 13

Which of the following is a role of phosphorus

Back 13

It is present as a solid in combination with calcium in bones and teeth it is also present in nucleic acids in many proteins and forms part of the high-energy compound ATP.

Front 14

The movement of ions across cell membranes is an example of

Back 14

Electrical energy

Front 15

Which of the following is the role of magnesium

Back 15

It is a present in bone and is an important factor for enzyme activity in a number of metabolic reactions

Front 16

Which of the following is the role of calcium

Back 16

It is found as a salt in bones and teeth in ionic form it is required for muscle contraction new transmission and blood clotting

Front 17

Which of the following statements is correct regarding the electrical charge of subatomic particles

Back 17

Protons are positively charged electrons are in nitrogen negatively charged and neutrons are neutral

Front 18

Which of the following the statement is correct regarding the location of subatomic particles

Back 18

Protons and neutrons are found inside the atomic nucleus and electrons are found outside the atomic nucleus

Front 19

An atom has 7 protons 8 neutrons and 7 electrons the number of electrons in its valence shell is

Back 19

5

Front 20

The atomic number of an atom reveals the number of

Back 20

Protons in the atomic nucleus

Front 21

Isotopes have

Back 21

The same number of protons and electrons but they differ in the number of neutrons

Front 22

An atom has 6 proton 8 neutrons and 6 neutrons its atomic mass number is

Back 22

14

Front 23

Triglycerides

Back 23

Are found in fat deposits. (e.g, subcutaneous tissue around organs) and serve to protect and insulate body organs; they are the major source of stored energy in the body

Front 24

Which of the following groups of chemicals includes ONLY Disaccharides

Back 24

Maltose, sucrose, lactose

Front 25

Keratin and collagen are examples of

Back 25

Proteins

Front 26

The organic compounds that function in building tissues and acting as enzymes are the

Back 26

Proteins

Front 27

Vitamin D can be described as

Back 27

Produced in the skin from a modified cholesterol molecule on exposure to UV radiation; necessary for normal bone growth and function

Front 28

Which one of the following DNA bases are complementary?

Back 28

Adenine and thymine

Front 29

Which of the following elements is always present in proteins and nucleic acids, but is usually NoT present in lipids and carbohydrates

Back 29

Nitrogen

Front 30

When a pair of electrons is shared equally between two atoms the bond formed is called an

Back 30

Non-polar covalent bond

Front 31

When sodium reacts with chlorine

Back 31

Sodium donates an electron to chloride and becomes a positively charged ion.

Front 32

The subatomic particles that are responsible for the chemical behavior of atoms are the

Back 32

Electrons

Front 33

Which of the following is a compound:

Back 33

Sodium chloride

Front 34

Synthesis reactions

Back 34

Involve bond formation and absorb energy

Front 35

The reaction A+B =>AB is an example of an

Back 35

Synthesis reaction

Front 36

Which of the following solutions is the weakest acid

Back 36

A solution with pH of 6.4

Front 37

An acidic solution has

Back 37

A pH less than 7

Front 38

Globular

Back 38

Play a critical role in virtually all biological processes