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Worksheets

Biomolecules

Total questions: 71

Worksheet time: 52mins

Name
Class
Date
1.
What biomolecule do enzymes belong to? 
a)
Carbohydrate
b)
Lipid
c)
Nucleic Acid
d)
Protein
2.
What is the function of a nucleic acid?
a)
Stores genetic information
b)
Stores energy
c)
Quick source of energy
d)
Builds structures
3.
Carbon, Hydrogen, Oxygen and Nitrogen are elements in what biomolecule?
a)
Carbohydrate
b)
Lipid
c)
Protein
d)
Nucleic acid
4.
What elements are common to all 4 biomolecules?
a)
Carbon, hydrogen, nitrogen
b)
Carbon, Nitrogen, Phosphorus
c)
Carbon, Hydrogen, Oxygen
d)
Carbon, Hydrogen, Phosphorus
5.
Identify the biomolecule
a)
Carbohydrate
b)
Lipid
c)
Protein
d)
Nucleic Acid
6.
Which biomolecule is this a picture of?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
7.
Which biomolecule is this a picture of?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
8.
Which biomolecule is this a picture of?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
9.

Which biomolecule helps form muscles?

a)

Nucleic Acid

b)

Carbohydrate

c)

Protein

d)

Lipids

10.

Which biomolecule is responsible for insulation and energy storage?

a)

Protein

b)

Nucleic Acid

c)

Lipid

d)

Carbohydrate

11.

Building blocks of polymers.

a)

monomer

b)

polypeptide

c)

monosaccharide

d)

glycerol

12.
What does the word organic mean?
a)
has nitrogen
b)
has sulfur
c)
has carbon
d)
has oxygen
13.
Which of the following is NOT a biomolecule?
a)
Water
b)
Nucleic Acid
c)
Protein
d)
Lipid
14.
The process that builds molecules by removing water to bind them together is
a)
Hydrolysis
b)
Protein Synthesis
c)
Dehydration Synthesis
d)
Lysis
15.
Identify the biomolecule
a)
monosaccharide
b)
disaccharide
c)
polysaccharide
d)
glycogen
16.
The chemical reaction that breaks down a molecule by adding water is
a)
Dehydration Synthesis
b)
Hydrophobia
c)
Hydrolysis
d)
Dehydration
17.
What do disaccharides, such as sucrose, and polysaccharides, such as starch, have in common?
a)
They are lipids made of fatty acids.
b)
They are proteins made of amino acids.
c)
They are nucleic acids made of nucleotides.
d)
They are carbohydrates made of simple sugars.
18.
How many sugar-phosphate strands exist in each RNA molecule?
a)
4
b)
2
c)
1
d)
None
19.
Lipids are made up of which of the following?
a)
glycerol and fatty acids tails
b)
glycerol and monolipids
c)
fatty acids and phosolipids
d)
amino acids and nucleotides
20.
Glycerol and fatty acids combine to form...?
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
21.
Proteins are long chains of amino acids that are held together by what kind of bond?
a)
Compound Protein Bond
b)
Double Bond
c)
Hydrogen Bond
d)
Peptide Bond
22.
All of the following are parts of a nucleotide except?
a)
Phosphate Group
b)
Nitrogen Base
c)
Amino Group
d)
Deoxyribose/Ribose sugar
23.

The difference of DNA and RNA is the presence of

a)

Uracil

b)

Guanine

c)

Adenine

d)

Cytosine

24.

When 2 amino acids undergo condensation, what bond is formed?

a)

Hydrogen bond

b)

Peptide bond

c)

Van der Waals

d)

Hydrophobic interaction

25.

All amino acids must have these EXCEPT

a)

Carboxylic

b)

Aldehyde

c)

Amine

d)

Hydrogen

26.

The significance of a lipid

a)

Thermal insulator

b)

Catalysis

c)

Transmit genetic information

d)

Control growth

27.

The polymer of carbohydrate EXCEPT

a)

Starch

b)

Collagen

c)

Cellulose

d)

Glycogen

28.

What is the name of this amino acid?

a)

Arginine

b)

Lysine

c)

Valine

d)

Proline

29.

The molecule shown below is

a)

a purine base

b)

a pyrimidine base

c)

a sugar

d)

a fatty acid

e)

an amino acid

30.

The molecule shown below is

a)

a purine base

b)

a pyrimidine base

c)

a sugar

d)

a fatty acid

e)

an amino acid

31.

What kind of molecule is represented by the structure below?

CH3CH2CH2CH2CH=CHCH2CH2CH2CH2CH2CH2CH2COOH

a)

a sugar

b)

an unsaturated fatty acid

c)

a saturated fatty acid

d)

a disaccharide

e)

a phospholipid

32.

What type of chemical bond is illustrated below?

a)

a sugar-sugar bond

b)

a glycerol-fatty acid bond

c)

a peptide bond

d)

a phosphate-phosphate bond

e)

a hydrogen bond

33.

Which of the following functions is not associated with proteins?

a)

contraction

b)

providing structural material

c)

enzymes

d)

specific binding

e)

information storage

34.

Which of the following levels of protein structure is often stabilized by S-S bonds?

a)

primary structure

b)

secondary structure

c)

tertiary structure

d)

quaternary structure

e)

both tertiary and quaternary structures

35.

The level of polypeptide folding in which the primary sequence coils around itself, stabilized by regularly spaced hydrogen bonds, is called

a)

primary structure

b)

alpha helix

c)

beta sheet

d)

tertiary structure

e)

quaternary structure

36.

What is the highest level of structure represented below? (Note: in this model, different polypeptide chains are represented by different colors)

a)

primary structure

b)

alpha helix

c)

beta sheet

d)

tertiary structure

e)

quaternary structure

37.

The sugar end of the DNA strand is referred to as the _____ end and the phosphate end is referred to as the _____ end.

a)

3' ; 5'

b)

top ; bottom

c)

hydrogen ; polynucleotide

d)

5' ; 3'

38.
How are polymers broken down?
a)
Hydrolysis
b)
Dehydration Synthesis
c)
With a hammer
d)
When oxidized
39.
What is a polymer?
a)
Carbon containing compound associated with and/or produced by living organisms
b)
Large, complex molecule
c)
A macro molecule composed of many small sub-unit molecules that have been joined together.
d)
Smol, simple "building block" molecule
40.

Proteins: Amino acids :: Nucleic Acids: _________

a)

Fatty Acids

b)

Nucleoside

c)

Nucleotides

d)

Polynucleotides

41.

Sugars: Glycosidic linkages :: Lipids: ___________

a)

Ester linkages

b)

Peptide bonds

c)

Phosphodiester linkages

d)

Chemical bonds

42.

Lipids are hydrophobic because they consist mostly of hydrocarbons, which form nonpolar covalent bonds

a)

TRUE

b)

FALSE

43.

Zinc, an essential trace element for most organisms, is present in the active site of enzyme carboxypeptidase. The zinc most likely functions as

a)

a cofactor necessary for enzyme activity

b)

a competitive inhibitor of the enzyme

c)

a non-competitive inhibitor of the enzyme

d)

a coenzyme derived from a vitamin

44.

NAD+ is the example of

a)

metal ion activator

b)

coenzyme

c)

prosthetic group

45.

Coenzymes are responsible for _

a)

preparing active site

b)

cleaning up

c)

reactants

d)

products

46.
Many coenzymes are
a)
metals
b)
vitamins
c)
proteins
d)
substances
47.
metal ions that bind to enzymes and enhance an enzyme's ability by attracting substrates are called:
a)
CoFactors
b)
CoEnzymes
c)
Allosteric Inhibitors
d)
Allosteric Activators
48.
Which of the following correctly describes how enzymes work?  
a)
they lower the energy of the reactants to increase the rxn rate
b)
they supply energy to the reaction to increase the rxn rate
c)
they lower the energy of the products to increase the rxn rate
d)
they lower the activation energy of the reaction to increase the rxn rate
49.
The part of the enzyme that the substrate bonds to is called the _____.
a)
active site
b)
activation energy
c)
bond site
d)
peptide bond
50.
The energy needed to start a reaction
a)
activation energy
b)
adhesion energy
c)
chemical energy
d)
cohesion energy
51.
Blocking Active site of an enzyme
a)
competitive inhibition
b)
allosteric inhibition
52.
Zinc and Iron
a)
Coenzymes
b)
Cofactors
c)
Organic
53.
Vitamin C
a)
Cofactor
b)
Coenzyme
c)
Competitive inhibitor
54.
Energy is released from ATP when
a)
a phosphate group is added
b)
adenine bonds to ribose
c)
ATP is exposed to sunlight
d)
a phosphate group is removed
55.

Cyanide is a toxin that stops the mitochondria from producing ATP. If cyanide were introduced into your cells, it is probably acting as a(n)

a)

activator

b)

coenzyme

c)

inhibitor

d)

substrate

56.
Some bacteria are metabolically active in hot springs because ____________
a)
their enzymes are insensitive to temperature
b)
they use molecules other than proteins as their main catalysts
c)
their enzymes have high optimal temperatures
d)
they are able to maintain an internal temperature much cooler than that of the surrounding water
57.
 Metabolism is _______________
a)
a constant supply of energy from food
b)
an increase of entropy in an organism
c)
all the energy transformation reactions in an organism
d)
biochemical pathways involved in synthesis of macromolecules
58.

Which of the following is FALSE?

a)

All enzymes work best at a neutral pH

b)

Enzymes work well at any pH higher than optimum

c)

At a lower pH, enzyme needs more kinetic energy to function

d)

There is an optimum pH for each specific enzyme.

59.

Enzymatic reactions can be controlled by

a)

the amount of substrates available

b)

the concentration of products

c)

temperature

d)

presence of inhibitors

60.

The specificity of enzymes is due to

a)

their high molecular weight

b)

their surface conformation

c)

their hydrogen bonding

d)

their pH sensitivity

61.

Which of the following shows that enzymes are proteins?

a)

Enzymes are denatured by high heat

b)

Enzyme activity is not affected by increasing temperature

c)

Enzymes have active sites for binding with substrates

62.

The main characteristic of a competitive inhibitor is its ability to

a)

combine with a prosthetic group

b)

occupy an active site

c)

modify a substrate

d)

occupy an allosteric site

63.

Which statement is true for a non-competitive inhibitor of enzyme activity, but NOT for a competitive inhibitor?

a)

Inhibitor molecules are similar to normal substrate molecule in size and shape

b)

Inhibition can be reduced by increasing the concentration of substrate molecules

c)

Large numbers of inhibitor molecules are needed for effective enzyme inhibition

d)

The inhibitor binds to the enzyme molecules at a position away from the active site

64.

In the graph of reaction rate versus substrate concentration shown, the curve reaches a plateau. Reaction rate does not increase any further at higher substrate concentration because

a)

the active sites of the enzyme molecules are saturated with substrates.

b)

there is a competitive inhibitor present.

c)

there is non-competitive inhibitor present.

d)

all substrates have been converted to products.

65.

_____ occurs when enzymes change shape so the active site no longer fits the substrate and the enzyme cannot function.

a)

denaturation

b)

concentration

c)

respiration

d)

reaction

66.

Meat tenderizer contains an enzyme that interacts with meat. If meat is coated with tenderizer and then placed in a refrigerator, how would the enzyme be affected?

a)

It would be broken down.

b)

It's shape would change.

c)

It's activity would slow down.

d)

It would no longer act as an enzyme.

67.

Luciferin is a molecule that, when broken down in fireflies, produces heat and light. The rate at which luciferin is broken down in cells is controlled by

a)

carbohydrates

b)

enzymes

c)

simple sugars

d)

fats

68.

A non competitive inhibitor...

a)

blocks substrates from binding which therefore produces no product

b)

allows substrates to bind but prevents enzymes from functioning properly

c)

helps enzymes bind to the substrate which produces product

69.

The difference between cofactors and coenzymes is

a)

that cofactors only work with inhibitors.

b)

that coenzymes block substrates.

c)

that cofactors promote enzyme activity.

d)

that coenzymes are organic.

70.

Letter A is called

a)

the substrate

b)

the enzyme

c)

the active site

d)

the product

71.

What type of Biological molecules is this?

a)

Carbohydrate

b)

Protein

c)

Lipid

d)

Nucleic Acid

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