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Unit 2: Chemistry of Life Review

Total questions: 35

Worksheet time: 28mins

Name
Class
Date
1.
Water is polar and oil is nonpolar.
a)
True
b)
False
2.
What is the main function of nucleic acids?
a)
To function in insulation.
b)
To store and transmit hereditary information.
c)
To provide energy
3.
What are the monomers of carbohydrates?
a)
Amino acids
b)
Fatty acids
c)
Nucleotides
d)
Monosaccharides (simple sugars)
4.
What is the strongest base listed in this figure?
a)
Hydrochloric acid
b)
Pure water
c)
Sodium hydroxide
d)
Sea water
5.
Enzymes are lipids.
a)
True
b)
False
6.
Most enzymes — 
a)
Speed up the chemical reaction
b)
Have no effect on the rate of the chemical reaction 
c)
Keep the rate of the chemical reaction the same
d)
Slow the rate of the chemical reaction 
7.
Enzymes _____ the activation energy of a reaction by binding a substrate and holding it in a way that lowers the activation energy.
a)
Lower
b)
Raise
c)
Maintain
8.
Most enzymes in with the suffix --
a)
-yme
b)
-gen
c)
-nic
d)
-ase
9.
All carbohydrates are —
a)
composed of carbon, hydrogen and oxygen atoms
b)
are made of amino acids
c)
composed of carbon, hydrogen, oxygen and nitrogen atoms
d)
composed of carbon, hydrogen, oxygen, nitrogen and phosphorus atoms
 D are made of fatty acids 
10.
Which structure in the figure would most likely be used to form muscles and connective tissue? 
a)
4
b)
1
c)
2
d)
3
11.

A monosaccharide is....

a)

carbohydrate

b)

lipids

c)

protein

d)

nucleic acid

12.

This macromolecule provides the major energy source used by mitochondria (and all living things)

a)

carbohydrate

b)

lipids

c)

protein

d)

nucleic acid

13.

This macromolecule make up cell membranes, store energy, and provide insulation

a)

carbohydrate

b)

lipids

c)

protein

d)

nucleic acid

14.

This macromolecule carries hereditary information and instructions for building molecules

a)

carbohydrate

b)

lipids

c)

protein

d)

nucleic acid

15.

This macromolecule provides structural support and act as enzymes to catalyze metabolic reactions

a)

carbohydrate

b)

lipids

c)

protein

d)

nucleic acid

16.

A macromolecule with C, H, O, and N only, is a.....

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

17.

Which statement is true?

a)

Simple sugars are made of polysaccharides.

b)

Glycerol is made of fatty acids.

c)

RNA molecules are made of nucleotides.

d)

Amino acids are made of proteins.

18.

Plants build cellulose (a polysaccharide) to makeup their parts like leaves, roots, stems, etc. What monomer do plants use to build cellulose?

a)

monosaccharides

b)

disaccharides

c)

amino acids

d)

nucleotides

19.

This group includes steroids like estrogen and testosterone

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

20.

One of the characteristics of life is that organisms must have genetic material. This genetic material is a ________.

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

21.

Identify the macromolecule in the picture.

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

22.

What is the term used to describe the energy needed to get a reaction started?

a)

activation energy

b)

adhesion energy

c)

cohesion energy

d)

chemical energy

23.

Which of the following statements is true about catalysts (enzymes)?

a)

Catalysts slow down the rate of chemical reactions.

b)

Enzymes help regulate pH.

c)

Catalysts are used up during a chemical reaction.

d)

Catalysts lower the activation energy of a chemical reaction.

24.

An enzyme and substrate can be compared to

a)

lock and key

b)

a faucet

c)

a door hinge

d)

light switch

25.

The picture below shows an enzyme acting on a substrate to form products during a chemical reaction. Using the figure, what letters represents the enzyme?

a)

A and B

b)

B and D

c)

A and E

d)

D and E

26.

What about the chemical structure of water causes many of the critical properties that support life on Earth?

a)

Hydrogen Bonds

b)

Cohesive behavior

c)

Polarity

d)

Expansion Upon Freezing

27.

Sweating is an example of what property of water?

a)

Ability to Moderate Temperature

b)

Expansion Upon Freezing

c)

Cohesive Behavior

d)

Universal Solvent

28.
Which biomolecule is found in fats, oils, and waxes and is a source of long-term energy? 
a)
Proteins
b)
Nucleic Acid
c)
Lipids
d)
Carbohydrate
29.
Carbon, Hydrogen, Oxygen and Nitrogen are elements in what biomolecule?
a)
Carbohydrate
b)
Lipid
c)
Protein
d)
Nucleic acid
30.
What elements are common to all 4 biomolecules?
a)
Carbon, hydrogen, nitrogen
b)
Carbon, Nitrogen, Phosphorus
c)
Carbon, Hydrogen, Oxygen
d)
Carbon, Hydrogen, Phosphorus
31.

Which biomolecule makes up cell membranes?

a)

Protein

b)

Carbohydrate

c)

Lipid

d)

Nucleic acid

32.
Which biomolecule is a main source of quick energy?
a)
Nucleic Acid
b)
Protein
c)
Lipid
d)
Carbohydrate
33.

Which of the following is a main function of a lipid?

a)

source of quick energy

b)

stores energy, insulates us, and makes up the cell membrane

c)

transport substances in and out of the cell

d)

stores genetic information

34.

What is the monomer for Lipids?

a)

Monosaccarides

b)

Fatty Acids

c)

Amino Acids

d)

Nucleotides

35.

7. Glycerol and fatty acids are the monomers of _________.

a)

Lipids

b)

Carbohydrates

c)

Proteins

d)

Nucleic Acids

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