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AQA Bio A-Level Module 1A

Total questions: 70

Worksheet time: 35mins

Name
Class
Date
1.
This picture shows what type of lipid?
a)
unsaturated fat
b)
wax
c)
saturated fat
d)
steroid
2.
Which specific lipid has the following characteristics:
1. Makes up the cell membrane
2. Has a polar, hydrophilic head
3. Has 2 non-polar, hydrophobic tails
a)
waxes
b)
phospholipids
c)
steroids
d)
triglycerides
3.
A "kinky structure" due to the double bonds between carbon atoms creates a lipid known as what?
a)
saturated fat
b)
wax
c)
steroid
d)
unsaturated fat
4.
Saturated fats are _____ at room temperature.
a)
solids
b)
gases
c)
liquids
d)
non of the above
5.
What type of lipid is this?
a)
steroid
b)
cholesterol
c)
phospholipid
d)
triglyceride
6.
In the phospholipid, the polar head is considered what type of structure?
a)
hydrophobic
b)
insoluble
c)
hydrophilic
7.
Which of the following molecules is not a lipid? 
a)
testosterone
b)
triglycerides
c)
cellulose
d)
phospholipids
8.

Lipids are composed of which atoms?

a)

Hydrogen, Oxygen, Nitrogen

b)

Hydrogen, Oxygen, Carbon

c)

Oxygen, Nitrogen, Carbon

d)

Oxygen, Nitrogen, Hydrogen

9.

Which diagram is a triglyceride?

a)
b)
c)
d)
10.

How many water molecules would be required to hydrolyse a triglyceride?

a)

One

b)

Two

c)

Three

d)

None

11.

What type of bond is being broken when a triglyceride is hydrolysed?

a)

glycosidic

b)

peptide

c)

ester

d)

phosphodiester

12.
What atoms make up all carbohydrates?
a)
Carbon, Sulfur, Hydrogen
b)
Carbon, Oxygen, Phosphorus
c)
Carbon, Oxygen, Nitrogen
d)
Carbon, Oxygen, Hydrogen
13.
How many sugar units make up monosaccharides?
a)
one
b)
two
c)
three
d)
zero
14.
How many sugar units make up disaccharides?
a)
one
b)
two
c)
three
d)
zero
15.
What type of carbohydrate is this?
a)
polysaccharide
b)
disaccharide
c)
monosaccharide
d)
it isn't a carbohydrate
16.

The element _______is found in all of the organic compounds.

a)

Iron

b)

Carbon

c)

Nitrogen

d)

Oxygen

17.

Monosaccharides are monomers of

a)

Lipids

b)

Nucleic Acids

c)

Proteins

d)

Carbohydrates

18.

The main function of a carbohydrate is

a)

long term energy storage

b)

stores genetic information

c)

short term energy storage

d)

regulates and controls all body proccesses

19.

What suffix (word ending) is used in the names of most carbohydrates?

a)

-ase

b)

-yme

c)

-ose

d)

-nic

20.

All polymers are made up of...

a)

monosaccharides

b)

polysaccharides

c)

monomers

d)

none of these

21.

How many sugar units make up polysaccharides?

a)

one

b)

two

c)

more than two

d)

zero

22.
The bond that joins amino acids are called:
a)
Peptide Bonds
b)
Ester Bonds
c)
Glycosidic Linkages
d)
Phosphodiester Bonds
23.

If a methyl group (-CH3), which does not like water, were at the 'R', the amino acid would likely be:

a)

Hydrophobic

b)

Hydrophilic

c)

Ionic

d)

Acidic

24.
The diagram shows a bond forming between two amino acids. What is the name of the resulting bond?
a)
Peptide Bond
b)
Glycosidic Linkage
c)
Ester Bond
d)
Hydrogen Bond
25.
Amino acids all have the same general structure except for the:
a)
Amino Group
b)
Carboxyl Group
c)
'R' Group
d)
Carbonyl Group
26.
The reaction used to digest and break the bond in red is:
a)
Hydrolysis
b)
Dehydration Synthesis
c)
Oxidation
d)
Single Displacement
27.
The primary sequence of a protein refers to the:
a)
Order of amino acids
b)
α-Helix or β-Pleated Sheet
c)
Interaction of subunits
d)
Hydrogen Bonding
28.
Structures like an α-Helix are formed because of:
a)
Hydrophobic Interactions
b)
DiSulphide Bridges
c)
Salt Bridges
d)
Hydrogen Bonding
29.
The number of amino acids used to produce proteins for all living things is:
a)
20
b)
∞
c)
15
d)
42
30.
The amino acid that results in disulphide bridges is:
a)
Cysteine
b)
Alanine
c)
Glutamic Acid
d)
Valine
31.
The structure of proteins can be changed by environmental factors such as temperature or pH.
a)
True
b)
False
32.
The sequence of amino acids is determined by:
a)
Genes
b)
Hydrogen Bonds
c)
Like Dissolves Like
d)
pH
33.
What are the building blocks of proteins?
a)
amino acid
b)
fatty acid
c)
nucleotide
d)
lipid
34.
The level of protein structure that results from hydrogen bonding causing the protein to fold into α-helix and β-pleated sheets is known as
a)
primary structure
b)
secondary structure
c)
tertiary structure
d)
quaternary structure
35.
The name of the initial chain of monomers in a protein is called.....
a)
polypeptide
b)
polysaccharide
c)
polyester
d)
polynucleotide
36.
Which is not a use or function of protein?
a)
forms enzymes and hormones
b)
forms transport channel in cell membrane
c)
forms structural proteins in the body
d)
quick energy
37.

The entire polypeptide forms a three-dimensional structure

a)

Primary

b)

Secondary

c)

Tertiary

d)

Quaternary

38.
This reaction shows a(n) ____________ reaction
a)
Catabolic
b)
Anabolic
c)
Dehydration Synthesis
d)
Halogenation
39.
The area that the substrate fits into on the enzyme is called the:
a)
Active Site
b)
Allosteric Site
c)
DiSulphide Bridge
d)
β-Pleated Sheet
40.
The current model of enzyme action is referred to as the:
a)
Induced Fit Model
b)
Lock & Key Model
c)
Singer-Nicolson Model
d)
Davson-Danielli Model
41.
Enzymes catalyze reactions by ___________ Activation Energy.
a)
Increasing
b)
Decreasing
42.
At high temperatures enzyme activity declines because of:
a)
Denaturation
b)
Decreased Kinetic Motion
c)
Increased H-Bonding
d)
Dissociation of Ionic Compounds
43.
At low temperatures enzyme activity declines because of:
a)
Denaturation
b)
Decreased Kinetic Motion
c)
Increased H-Bonding
d)
Dissociation of Ionic Compounds
44.
Most enzymes have the ending:
a)
-ase
b)
-ose
c)
-ic acid
d)
-ate
45.
The molecule an enzyme is working on is called the:
a)
Substrate
b)
Solvent
c)
Allosteric Inhibitor
d)
CoEnzyme
46.
When a molecule can occupy the same active site as the substrate, a situation called __________________ can result
a)
Competitive lnhibition
b)
Allosteric Regulation
c)
Non-Competitive Inhibition
d)
Feedback Inhibition
47.
A receptor site that a molecule can bind to that changes the shape of the active site is called a(n):
a)
Allosteric Site
b)
Active Site
c)
DiSulphide Bridge
d)
MHC Receptor
48.
Molecules that bind to enzymes and enhance an enzyme's ability are called:
a)
CoFactors
b)
CoEnzymes
c)
Allosteric Inhibitors
d)
Allosteric Activators
49.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
50.
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 .
51.
In the diagram, what is letter A? 
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
52.
Which enzyme is most efficient in a basic solution?
a)
A
b)
B
53.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
54.

Which of the following best explains why enzymes are necessary for reactions in our cells?

a)

The reactions are too slow to meet the needs of the cell if enzymes are missing.

b)

Enzymes supply the oxygen necessary for the reactions.

c)

Enzymes change reactants from solid to liquid during the reactions.

d)

The reactions take up too much space in the cell if enzymes are missing.

55.

The ____________________ mechanism describes how each substrate must fit into the enzyme.

a)

lock and key

b)

hammer and nail

c)

jigsaw puzzle

d)

seesaw

56.

Once a new product leaves an enzyme, the enzyme is unchanged and ready for the next substrate. What is this called?

a)

fragile

b)

reusable

c)

specific

d)

catalyst

57.

Enzymes are _______________ that _____________________ chemical reactions by ____________ the amount of activation energy required to start the reaction.

a)

carbohydrates, slow down, lowering

b)

proteins, speed up, increasing

c)

lipids, speed up, lowering

d)

proteins, speed up, lowering

58.

Exothermic reactions:

a)

release energy

b)

absorb energy

59.

Endothermic reactions:

a)

release energy

b)

absorb energy

60.

Polymer formed by the condensation of monosaccharides

a)

Hydrolysis

b)

Condensation

c)

Disaccharide

d)

Polysaccharide

61.

Type of reaction that joins monomers to form polymers​

a)

Hydrolysis

b)

Condensation

c)

Monosaccharide

d)

Polysaccharide

62.

Small molecules that are joined to form polymers​

a)

Monosaccharide

b)

Polysaccharide

c)

Polymer

d)

Monomer

63.

Type of reaction that breaks polymers to form monomers​

a)

Hydrolysis

b)

Condensation

c)

Monomer

d)

Polymer

64.

Large molecule formed by the condensation of monomers

a)

Polysaccharide

b)

Monosaccharide

c)

Polymer

d)

Monomer

65.

Monomer formed by the hydrolysis of polypeptides​

a)

Monosaccharide

b)

Fatty acid

c)

Amino acid

d)

Nucleotide

66.

Which of these could be formed by the condensation of amino acids?

a)

Protein

b)

Starch

c)

Fat

d)

DNA

67.

Hydrolysis will _______ a _________ into a glycerol head and 3 fatty acids

a)

build....polysaccharide

b)

break....polysaccharide

c)

build....triglyceride

d)

break....triglyceride

68.

Hydrolysis breaks apart polymers with the addition of

a)

monomers

b)

amine groups

c)

water

d)

hydroxyl groups

69.
The phospholipid bilayer comprises what part of the cell?
a)
cytoplasm
b)
cell membrane
c)
cytoskeleton
d)
nuclear membrane
70.
In the phospholipid, the polar head is considered what type of structure?
a)
hydrophobic
b)
insoluble
c)
hydrophilic

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