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Unit 2: Biomolecules and Enzymes Study questions

Total questions: 48

Worksheet time: 34mins

Name
Class
Date
1.

The substrates in green are considered to be...

a)

Reactants

b)

Products

2.

When the Enzyme and Substrate combine at the Active site this is known as the...

a)

Subtrate entering active site

b)

Enzyme/Product Complex

c)

Enzyme Substrate Complex

d)

Products leaving active site of enzyme

3.

What is the ideal pH for Salivary Amylase?

a)

4

b)

8

c)

9

d)

6

4.

What happens to the Enzyme Pepsin when the pH reaches 4?

4 lines
5.

Which chemical reaction is responsible for using enzymes to put monomers together while releasing water?

a)

Dehydration Synthesis

b)

Hydrolysis

6.

Check all the correct items regarding Hydrolysis

a)

Releases water as a by product

b)

Breaks Polymers up into monomers

c)

Water is a reactant and used to break up the polymer

d)

A catabolic reaction that breaks molecules apart.

7.

True or False: An enzyme only has 1 job.

a)

True

b)

False

8.

True or False: There is only 1 type of enzyme in the human body

a)

True

b)

False

9.

Look at the graph, why is the graph line flat? What happened to the enzyme?

4 lines
10.

What is happening to the enzyme at the circle spot?

a)

The Enzyme denatured

b)

The Enzyme is saturated. There are no more spots for the substrates to bind.

c)

The Rate of reaction increases

d)

The saturation concentration decreases

11.

Which factors denature an enzyme?

a)

Temperature

b)

Substrate Concentration

c)

pH

12.

Which factors affect the rate of the reaction of the enzyme?

a)

Temperature

b)

Substrate Concentration

c)

pH

13.
Which biomolecule includes sugars, cellulose and starch?
a)
Lipids
b)
Proteins
c)
Carbohydrates
d)
Nucleic Acid
14.
Which biomolecule is made of the monomer amino acids?
a)
Nucleic Acid
b)
Carbohydrate
c)
Protein
d)
Lipid
15.
Enzymes are considered to be 
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
16.
What is being represented by the letter A in the image?
a)
Substrate
b)
Enzyme
c)
Product
d)
Complex
17.
Enzymes need certain environmental conditions in order to function properly.  What happens when enzymes are heated to a high temperature?
a)
they die
b)
they denature (change shape)
c)
they change their amino acid sequence
d)
they work better
18.
The following figure is illustrating
a)
Dehydration Synthesis
b)
Hydrolysis
19.
The following figure is illustrating
a)
Dehydration Synthesis
b)
Hydrolysis
20.
The following figure is illustrating
a)
Dehydration Synthesis
b)
Hydrolysis
21.

Which of the following is represented in the image?

a)

Nucleotide

b)

Carbohydrate

c)

Lipid

d)

Protein

22.

What biomolecules are NOT used for energy (two answers, choose both before continuing)?

a)

Carbohydrates

b)

Lipids

c)

Proteins

d)

Nucleic acids

23.

Which of the following is NOT a lipid?

a)

Fats

b)

Oils

c)

Waxes

d)

Proteins

24.

Which color line represent a reaction with an enzyme present?

a)

Blue

b)

Red

c)

Both

d)

Neither

25.

The specific location where the substrates bind to the enzyme is called the

a)

specific site

b)

appropriate site

c)

active site

d)

ignition site

26.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
27.
What is another name for enzymes?
a)
chemical catalysts
b)
microorganisms
c)
biological catalysts
d)
inorganic catalysts
28.
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 .
29.
The diagram shows the series of a reactions that convert lactose into a usable form .
If enzyme 4 is denatured (stops working), the levels of which substance will increase?
a)
Lactose
b)
Galactose
c)
Glucose-1-Phosphate
30.

In living cells, enzymes act as catalysts, which may reduce the amount of activation energy required for a chemical reaction to occur. In the graphs below, pathway x is a solid line representing the uncatalyzed reaction. The dotted line shows the catalyzed reaction. Which graph best illustrates the changes in a reaction when the catalyst reduces the amount of energy required?

a)
b)
c)
d)
31.

The diagram below shows the general structure of an amino acid. Which type of molecule is formed from amino acids?

a)

lipids

b)

proteins

c)

carbohydrates

d)

nucleic acids

32.

What will most likely happen if an appropriate enzyme is added to a chemical reaction?

a)

The reaction rate will increase.

b)

The equilibrium of the reaction will be maintained.

c)

The reaction rate will decrease.

d)

The reaction will stop.

33.

The human body maintains a temperature of around 98.6 degrees at all times. Enzymes are involved in almost every chemical reaction in the body. Which of the following describes the connection between these two statements?

a)

Enzymes function best at a specific temperature.

b)

The body needs to be warm to prevent hypothermia.

c)

The body is kept relatively warm to prevent too much enzyme action.

d)

There is no connection between the two statements.

34.
What type of molecule is this?
a)
Nucleic acid
b)
Protein
c)
Carbohydrate
d)
Lipid
35.
Which list the levels of organization in order from smallest to largest?
a)
cell-organ-tissue-biomolecules-organism
b)
biomolecules-organelles-cells-tissue-organ-organ system-organism
c)
organism-organ system-organ-tissue-cells-organelles-biomolecules
d)
organism-atom-cell-organ system-organ-biomolecules
36.
Which of the following is a carbohydrate (monosaccharide)?
a)
A
b)
B
c)
C
d)
D
37.
Which statement is true?
a)
Simple sugars are made of amino acids
b)
Lipids have a glycerol molecule
c)
DNA is a protein
d)
Starch is a monosaccharide
38.
Pepsin is an enzyme that acts on
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
39.

The enzyme ____________ breaks down the sugar_____________

a)

Lactase, Lactose

b)

Lactose, Lactase

40.

The enzyme Lipase breaks down__________

a)

Proteins

b)

Sugars

c)

Lipids

d)

Lactose

41.

When the temperature increases about 40 degrees Celcius, what happens to the enzyme reaction rate?

a)

The enzyme reaction rate decreaes

b)

The enzyme reaction rate increases

c)

The enzyme denatures at 50 degrees celcius

d)

The enzyme reaction rate stays the same

42.

The Es are Enzymes. If E2 is denatured which product would be effected?

a)

A

b)

B

c)

C

d)

D

43.

Which is the substrate for Enzyme 3 (E3)?

a)

A

b)

B

c)

C

d)

D

44.

Which is the product for Enzyme 3 (E3)?

a)

A

b)

B

c)

C

d)

D

45.

Which of the following are sugars? (look at the root word and endings)

a)

Maltase

b)

Maltose

c)

Lactose

d)

Lactase

46.

An example of a monosaccharide would be glucose. What does "Saccharide" mean?

a)

Glucose

b)

Protein

c)

Lipid

d)

Sugar

47.

When you see the ending "-ose" that means we are looking at a....

a)

sugar

b)

Lipid

c)

Protein

d)

nucleic acid.

48.

Lysosomes are organelles that clean up inside the cell. What does Lys mean?

a)

To put together

b)

To break down

c)

To build up

d)

To encourage.

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