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Unit 2: Water, Biochemistry, & Enzymes

Total questions: 60

Worksheet time: 1hrs 21mins

Name
Class
Date
1.

What is the main function of a carbohydrate?

a)

Store energy and provide structural support.

b)

Store genetic information.

c)

Store energy and provide barriers.

d)

Controls the rate of reactions and regulates cell processes.

2.

What is the biological function of a lipid?

a)

Release energy.

b)

Store genetic information.

c)

Store energy and provide barriers.

d)

Controls the rate of reactions and regulates cell processes.

3.

Which type of molecule is formed from amino acids?

a)

lipids

b)

proteins

c)

carbohydrates

d)

nucleic acids

4.

Fats, oils and cholesterol are all types of what?

a)

cell membranes

b)

hormones

c)

lipids

d)

fatty acids

5.

RNA and DNA are which type of macromolecules?

a)

nucleic acid

b)

carbohydrate

c)

lipids

d)

protein

6.

A sugar, a phosphate group, and a nitrogen base form the building blocks of which organic compound?

a)

carbohydrates

b)

nucleic acids

c)

proteins

d)

lipids

7.

Which of the following properties of water enables it to move from the roots to the leaves of plants?

a)

Water expands as it freezes.

b)

Water is an excellent solvent.

c)

Water exhibits cohesive behavior.

d)

Water is able to moderate temperatures.

8.

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?

a)

Water is an acid.

b)

Water is a versatile solvent.

c)

Water acts as a buffer.

d)

Water has a high heat capacity.

9.

Why does ice stay at the top of oceans instead of sinking to the bottom?

a)

Ice is colder than liquid water.

b)

Ice is more dense than liquid water.

c)

Ice is warmer than liquid water.

d)

Ice is less dense than liquid water.

10.

Water striders are an insect that gets it's name from its ability to walk on top of water. This is due to the _________________.

a)

surface tension resulting from the polarity of water molecules

b)

high specific heat of water of water

c)

ability of water to act as a solvent

d)

expansion of water upon freezing

11.

This structure represents

a)

carb

b)

lipids

c)

proteins

d)

nucleic acids

12.

This structure represents

a)

Carbs

b)

Lipids

c)

Nucleic Acids

d)

Proteins

13.

Made of C,H,O

a)

carbs and lipids

b)

proteins

c)

nucleic acids

d)

nucleotides

14.

C,H,O,N

a)

proteins

b)

lipids

c)

nucleic acids

d)

carbs

15.

A substance made of many parts

a)

polymer

b)

monomer

c)

monosaccharides

d)

proteins

16.

If a substance is 4 on the pH scale it would be considered

a)

slimy

b)

bitter

c)

acidic

d)

basic

17.

A substance is 13 on the pH scale. This substance would be considered

a)

basic

b)

acidic

18.

Monomer of nucleic acid

a)

hemoglobin

b)

monosaccharide

c)

nucleotide

d)

nucleolus

19.
Which macromolecule stores energy, insulates us, and makes up the cell membrane?
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
20.

Which macromolecule builds muscles and immunity?

a)
protein
b)
nucleic acid
c)
lipids
d)
carbohydrates
21.

The most important element that is the backbone of all biological molecules

a)
carbon
b)
nitrogen
c)
phosphorus
d)
sulfur
22.
What are the four macromolecules?
a)
proteins, nucleic acids, carbohydrates, and lipids
b)
monosaccharides, lipids, polysaccaharides, and proteins
c)
RNA, DNA, proteins, and carbohydrates
d)
proteins, DNA, RNA, and steroids
23.
What is the primary function of carbohydrates in your body?
a)
Speed up chemical reactions.
b)
Give immediate energy.
c)
Help to store energy.
d)
Build cell walls in plants.
24.

What is this?

a)

Triglyceride

b)

Guanine

c)

Polysaccharide

d)

Amino Acid

25.

What type of reaction produces water?

a)

Hydrolysis

b)

CHONPS

c)

Dehydration Synthesis

d)

Organic Chemistry

26.

What happens when lipids are mixed with water?

a)

An exothermic reaction occurs

b)

They do not mix, due to lipids being hydrophobic

c)

They mix very well, due to lipids being hydrophilic

d)

An endothermic reaction occurs

27.

what is the lipids function?

a)

to jump higher

b)

provides short term energy

c)

provides long term energy

d)

to run faster

28.

what goes in the white part

a)
b)
c)
d)
29.

what goes in the white space

a)
b)
c)
d)
30.

what goes in the white space

a)
b)
c)
d)
31.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
32.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
33.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
34.

Which labeled part is the substrate?

a)

letter A

b)

letter B

c)

letter D

d)

letter E

35.

Which labeled part is the enzyme?

a)

letter A

b)

letter B and D

c)

letter D

d)

letter E

36.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
37.
Which enzyme is most efficient in a basic solution?
a)
A
b)
B
38.
What is indicated by letter A?
a)
enzyme
b)
product
c)
substrate
d)
active site
39.
Enzymes are composed of which of the following monomers? 
a)
amino acids
b)
carbohydrates
c)
nucleotides
d)
monosaccharides
40.
What happens to an enzyme when it is denatured?
a)
Activation energy is lowered.
b)
It becomes stronger.
c)
It loses its shape.
d)
Activation energy is raised.
41.

Which type of fatty acid is healthy for the body?

a)

saturated

b)

trans fat

c)

unsaturated

d)

triglycerides

42.
The element _______is found in all of the organic compounds.
a)
Iron
b)
Nitrogen
c)
Carbon
d)
Oxygen
43.
Carbohydrates are made of... 
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
44.
Lipids are made of... 
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
45.
Proteins are made of... 
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
46.

Refer to the figure above. What temperature would be considered the optimum temperature for this enzyme's activity rate?

a)

20 Degrees Celsius

b)

60 Degrees Celsius

c)

40 Degrees Celsius

d)

30 Degrees Celsius

47.

Which of the following is an enzyme?

a)

lipase

b)

lactose

c)

galactose

d)

glucose

48.
What is the function of nucleic acids?
a)
store genetic information
b)
store energy (long-term)
c)
store energy (short-term)
d)
build skin, hair, nails, muscles
49.
All polymers are made up of...
a)
monosaccharides
b)
monomers
c)
proteins
d)
None of these
50.

Changes in pH and temperature can ___________________ an enzyme which causes it to lose its shape and affects its function.

a)

puncture

b)

denature

c)

double

d)

delete

51.

Contains the elements carbon, hydrogen, nitrogen, and phosphorous (CHONP)

a)

carbohydrates

b)

lipids

c)

proteins

d)

nucleic acids

52.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
53.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
54.

What property of water allows water to flow against gravity?

a)

Polarity

b)

Cohesion

c)

Capillary Action

d)

Adhesion

55.
 Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?
a)
The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together
b)
The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet
c)
The insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface
d)
The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
56.

What property of water allows for water to act as a temperature regulator for the world?

a)

Cohesive Behavior

b)

Expansion Upon Freezing

c)

High Specific Heat

d)

Universal Solvent

57.

Why does ice stay at the top of oceans instead of sinking to the bottom? 

a)

Ice is colder than liquid water

b)

Ice is less dense than liquid water

c)

Ice is more dense than liquid water

d)

Ice is warmer than liquid water

58.

What molecule is this?

a)

calcium

b)

hydrogen

c)

helium

d)

water

59.

A paperclip floating on water is an example of what property of water?

a)

capillary action

b)

surface tension

c)

universal solvent

d)

specific heat index

60.

Which of the following is LEAST likely to dissolve in water?

a)

nonpolar fats and oils

b)

polar sugar molecules

c)

salt made of a positive sodium ion and a negative chloride ion

d)

all of the substances will dissolve easily in water

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