Deck 2: Chemistry of Life

Question 1

Which subatomic particle has no charge?

A) proton
B) neutron
C) electron
D) nucleus

Answer 1

neutron

Question 2

An atom that contains 20 protons,21 neutrons,and 20 electrons has an atomic number of

A) 20
B) 41
C) 40
D) 61

Answer 2

20

Question 3

Acids have

A) a pH less than 7
B) more H+ ions than OH- ions
C) more OH- than H+ ions
D) both A and B

Answer 3

both A and B

Question 4

The atomic mass of an atom is the number of

A) protons
B) neutrons
C) electrons
D) both A and B

Question 5

Which subatomic particle has a negative charge?

A) proton
B) neutron
C) electron
D) nucleus

Question 6

Bases have

A) a pH less than 7
B) more H+ ions than OH- ions
C) a pH greater than 7
D) both A and B

Question 7

Electrons are found

A) in the nucleus
B) in orbitals
C) at various distances from the nucleus called energy levels
D) both B and C

Question 8

The subatomic particle that determines how an atom unites with other atoms is the

A) proton
B) neutron
C) electron
D) both A and B

Question 9

Which subatomic particle is found in the nucleus?

A) proton
B) neutron
C) electron
D) both A and B

Question 10

Which of these elements is not one of the four elements that make up most of the human body?

A) carbon
B) nitrogen
C) oxygen
D) calcium

Question 11

The atomic number of an atom is the number of

A) protons
B) neutrons
C) electrons
D) both A and B

Question 12

The process of hydrolysis

A) uses water to turn large molecules into smaller ones
B) removes a molecule of water from the reactants
C) converts smaller molecules into larger molecules by removing water
D) both B and C

Question 13

Bonds that usually dissociate in water to form electrolytes are _____ bonds.

A) ionic
B) covalent
C) organic
D) both B and C

Question 14

A solution with a pH of 4

A) has 100 times more H+ ions than a solution with a pH of 2
B) has 100 times fewer H+ ions than a solution with a pH of 2
C) has 100 times fewer H+ ions than a solution with a pH of 6
D) is basic

Question 15

The end product of a reaction between a strong acid and a strong base is

A) water
B) a salt
C) a weak acid and a weak base
D) both A and B

Question 16

Which subatomic particle has a positive charge?

A) proton
B) neutron
C) electron
D) nucleus

Question 17

An atom that contains 20 protons,21 neutrons,and 20 electrons has an atomic mass of

A) 20
B) 41
C) 40
D) 61

Question 18

The process of dehydration synthesis

A) uses water to turn large molecules into smaller ones
B) adds a molecule of water to the reactants
C) converts smaller molecules into larger ones by removing water
D) both A and B

Question 19

The bonds formed when electrons are shared are called

A) electrolytes
B) ionic bonds
C) covalent bonds
D) inorganic bonds

Question 20

An atom that contains 20 protons,21 neutrons,and 20 electrons has

A) a positive charge
B) a negative charge
C) no charge (electrically neutral)
D) not enough information is given to determine its charge

Question 21

Triglycerides

A) are steroid lipids
B) have a phosphorus-containing unit on one end
C) have two fatty acids
D) have three fatty acids

Question 22

A full atomic orbital always contains eight electrons.

Question 23

Which of the following is a functional protein?

A) collagen
B) keratin
C) enzymes
D) both A and B

Question 24

Which type of chemical bond does not result in the formation of a new molecule?

A) hydrogen bond
B) ionic bond
C) covalent bond
D) None of the above; all chemical bonds result in the formation of a new molecule.

Question 25

Which substance is found only in DNA?

A) adenine
B) guanine
C) thymine
D) cytosine

Question 26

Phospholipids

A) contain glycerol
B) contain two fatty acids
C) contain three fatty acids
D) are steroid lipids

Question 27

The atomic number of an atom is the number of protons plus the number of electrons.

Question 28

Which of the following is an example of a monosaccharide?

A) sucrose
B) glucose
C) lactose
D) glycogen

Question 29

Cholesterol

A) contains three fatty acids
B) contains two fatty acids
C) is a steroid lipid
D) contains glycerol

Question 30

The closer an orbital is to the nucleus of an atom,the higher its energy level.

Question 31

The mass of an atom is determined by the total number of protons and electrons.

Question 32

Which of the following substances is not found in a DNA nucleotide?

A) phosphate unit
B) glycerol molecule
C) nitrogen base
D) a sugar

Question 33

The two subatomic particles found in the nucleus of the atom are protons and neutrons.

Question 34

The nitrogen atom has a total of seven electrons.To have a full outer energy level,it would have to

A) add one electron
B) lose one electron
C) add three electrons
D) lose two electrons

Question 35

Matter is anything that occupies space and has mass.

Question 36

Which of the following is an example of a polysaccharide?

A) sucrose
B) glucose
C) lactose
D) glycogen

Question 37

An atom with 11 protons,12 neutrons,and 10 electrons has an atomic number of 11.

Question 38

Which of the following is not true of proteins?

A) They have water-repelling tails.
B) They are made up of amino acids.
C) They contain nitrogen.
D) They contain peptide bonds.

Question 39

Which of the following is a structural protein?

A) collagen
B) keratin
C) enzymes
D) both A and B

Question 40

An atom with 11 protons,12 neutrons,and 10 electrons has an atomic mass of 21.

Question 41

Bases have a higher concentration of OH- ions than H? ions.

Question 42

A solution with a pH of 8 has more H⁺ ions than a solution with a pH of 4.

Question 43

Covalent bonds are formed when atoms share electrons.

Question 44

Ionic bonds result from atoms sharing electrons.

Question 45

An atom with 11 protons,12 neutrons,and 10 electrons has a +1 charge.

Question 46

A solution with a pH of 5 has more H⁺ ions than a solution with a pH of 7.

Question 47

All molecules are not necessarily compounds.

Question 48

One of the end products of hydrolysis would have one more hydrogen atom than it did at the beginning of the reaction.

Question 49

An element is a substance composed of only one type of atom.

Question 50

For a compound to be considered an organic compound it must have a C-O or an H-O bond.

Question 51

When an ionic compound is put into water,it dissociates into ions.

Question 52

When a strong acid and a strong base react,one of the end products is water.

Question 53

The process of hydrolysis has water as one of its end products.

Question 54

When a covalent compound is put into water,it dissociates into ions.

Question 55

The process of dehydration synthesis makes bigger molecules from smaller molecules.

Question 56

A solution with a pH of 2 has 10 times the number of H? ions than a solution with a pH of 3.

Question 57

Water is the most abundant organic compound in the body.

Question 58

Chemical bonds form when atoms share,donate,or borrow electrons.

Question 59

Acids have a higher concentration of H⁺ ions than OH- ions.

Question 60

The process of dehydration synthesis has water as one of its end products.

Question 61

Both fats and oils are lipids.

Question 62

Glycogen and starch are both examples of polysaccharides.

Question 63

Cholesterol is needed for the formation of several hormones in the body.

Question 64

When a strong acid and a strong base react,one of the end products is a salt.

Question 65

A triglyceride contains a molecule of glycerol.

Question 66

A weak acid almost completely dissociates in water.

Question 67

The basic building block of proteins is nucleotides.

Question 68

The basic building blocks of protein are held together by peptide bonds.

Question 69

Sucrose is an example of a disaccharide.

Question 70

Enzymes are functional proteins that act as chemical catalysts.

Question 71

Phospholipids are important molecules in the cell membrane.

Question 72

Cholesterol is a steroid lipid.

Question 73

The basic unit of a carbohydrate is a monosaccharide.

Question 74

Cholesterol contains two fatty acid molecules.

Question 75

A molecule of glucose is larger than a molecule of sucrose.

Question 76

The process of dehydration synthesis could be used to convert a monosaccharide into a disaccharide.

Question 77

Structural proteins include collagen,keratin,and enzymes.

Question 78

A buffer is a substance that resists a sudden change in pH.

Question 79

Phospholipids contain three fatty acids.

Question 80

A triglyceride contains two fatty acid molecules.