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SBI 4U Unit 1 Biochemistry

Total questions: 50

Worksheet time: 40mins

Name
Class
Date
1.

Select the molecule that is the monomer of proteins.

a)
b)
c)
d)
2.

Which of the following is true of both starch and cellulose?

a)

They are both polysaccharides.

b)

They have the same structure.

c)

They can both be digested by humans

d)

They are both used for energy storage in plants.

3.

Which part of an amino acid has different chemical properties?

a)

the amino group

b)

the peptide bond

c)

the R group (or side chain)

d)

the carboxyl group

4.

Which macromolecule does not form polymers?

a)

protein

b)

lipid

c)

carbohydrate

d)

nucleic acid

5.

What are the monomers and polymers of proteins called?

a)

nucleotide...nucleic acid

b)

nucleic acid...protein

c)

amino acid...polypeptide

d)

monosaccharide...polysaccharide

6.

What is this molecule?

a)

Saturated fatty acid

b)

Unsaturated fatty acid

c)

Phospholipid

d)

Triglycerol

7.

What is the polarity of the phosphate heads on phospholipids?

a)

Polar

b)

Nonpolar

c)

Hydrophobic

d)

Bananaphobic

8.

What are the parts of a nucleotide?

a)

nitrogen base and phosphate group

b)

Nitrogen base

c)

5 carbon sugar and nitrogen base

d)

nitrogen base, 5 carbon sugar, and phosphate group

9.

What are fats made of ?

a)

lipid with 3 fatty acids

b)

lipids

c)

lipid with 2 fatty acids

d)

none of the above

10.

Protein loses shape in high temp and high solute this is called?

a)

hydrolysis

b)

protein function

c)

dehydration

d)

denature

11.

This process removes water to make polymers.

a)

denature

b)

hydrolysis

c)

dehydration

d)

protein function

12.

DNA is...

a)

single stranded

b)

doesn't exist

c)

double stranded

d)

is RNA but in disguise

13.

Amino acids are the monomers of,

a)

carbohydrates

b)

lipids

c)

proteins

d)

amino acids

14.

What are the functions of proteins ?

a)

enzymes

b)

energy

c)

transport, enzyme, structual support and hormone

d)

storage

15.
The image below shows a polymer of glucose molecules. What type of macromolecule is this?
a)
carbohydrate
b)
protein
c)
lipid
d)
nucleic acid
16.
What type of macromolecule is shown in the image below?
a)
Carbohydrate
b)
Nucleic Acid
c)
Fatty Acid
d)
Protein
17.
Which of the macromolecules contain nitrogen?
a)
proteins only
b)
nucleic acids only
c)
proteins and lipids
d)
nucleic acids and proteins
18.
What is the function of fats for living organisms?
a)
short term energy storage
b)
store hereditary information
c)
long term energy storage
d)
catalyze metabolic reactions
19.

How are the subunits of proteins linked together?

a)

ether linkage

b)

glycosidic linkage

c)

Ester linkage

d)

peptide (amide) linkage

20.
The image depicts which level of structure in proteins?
a)
primary
b)
secondary
c)
tertiary
d)
quaternary
21.
Which type of lipid forms the primary structure of the cell membrane?
a)
triglycerides
b)
wax
c)
cholesterol
d)
phospholipid
22.

Which is NOT an organic compound?

a)

carbohydrates

b)

water

c)

nucleic acids

d)

proteins

23.

Which of the following is NOT paired correctly?

a)

glucose- carbohydrate

b)

fat- lipid

c)

starch-nucleic acid

d)

enzyme-protein

24.

A lipid molecule is best represented by which diagram.

a)

A

b)

B

c)

C

d)

D

25.

Which diagram represents a macromolecule that is responsible for genetic coding?

a)

A

b)

B

c)

C

d)

D

26.

Which diagram represents a macromolecule that is found in fish, meat, and eggs?

a)

A

b)

B

c)

C

d)

D

27.

Which diagram represents a molecule that is found in sugar, starches, and grains?

a)

A

b)

B

c)

C

d)

D

28.

Enzymes affect the reactions in living cells by changing the

a)

products of the reaction

b)

pH of the reaction

c)

temperature of the reaction

d)

speed of the reaction

29.

Use the diagram to identify the enzyme, substrate, active site and products (in that order)

a)

c,d,a,b

b)

d,a,b,c

c)

b,c,a,d

d)

c,a,b,d

30.

Why can’t a denatured enzyme do it’s job?

a)

it’s shape has been altered

b)

it’s a polypeptide

c)

too many reactants involved

d)

to many products created

31.
Enzymes are _________ that __________ chemical reactions.
a)
proteins, slow down
b)
proteins, speed up
c)
lipids, slow down
d)
lipids, speed up
32.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
33.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
34.
After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
a)
a substrate
b)
an enzyme
c)
a product
d)
an active site
35.
In the diagram, what is letter A? 
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
36.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
37.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
38.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
39.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
40.
Enzymes provide a site where reactants called substrates can be brought together in an enzyme-catalyzed reaction. The site is called the
a)
enzyme substrate complex.
b)
reaction site.
c)
active site.
d)
lock and key.
41.

Some of the enzymes possess additional sites, known as

a)

Active site

b)

Binding site

c)

Allosteric sites

d)

Inhibitor site

42.

Which of the following is a way to overcome competitive inhibition of an enzyme?

a)

increase product concentration

b)

increase substrate concentration

c)

decrease enzyme concentration

d)

decrease environmental temperature

43.

Where does a substrate bind to an enzyme?

a)

active site

b)

allosteric site

44.

How does a noncompetitive inhibitor decrease reaction rates?

a)

binds to the active site

b)

binds to the allosteric site

c)

increases the free energy

d)

increases the substrate concentration

45.

A form of bulk transport in which materials are transported from the inside to the outside of the cell in membrane-bound vesicles that fuse with the plasma membrane.

a)

Endocytosis

b)

Exocytosis

c)

Osmosis

d)

Diffusion

46.

white blood cells engulfing invading bacteria is an example of

a)

Endocytosis

b)

Exocytosis

c)

Diffusion

d)

Facilitated Diffusion

47.
What type of transport is this?
a)
Endocytosis
b)
Facilitated Diffusion
c)
Active Transport Pump
d)
Osmosis
48.
What is the difference between active and passive transport?
a)
Active does not need energy and passive uses ATP (energy)
b)
Active uses ATP (energy) and passive does not need energy
c)
Active stores transport proteins and passive releases 
d)
Active uses hormones and passive does not 
49.
What is diffusion?
a)
when molecules move from a low concentration to a high concentration 
b)
when molecules move from a high concentration to a low concentration.
c)
no movement 
d)
molecules move everywhere
50.
Osmosis is the movement of _____ across a membrane.
a)
food
b)
energy
c)
oxygen
d)
water

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