WorksheetsNat 5 Key Area 1.4 Proteins
Total questions: 30
Worksheet time: 19mins
Antibodies are composed of..
starch
protein
glucose
glycerol
Proteins have different functions. Which of the following statements identifies a protein and its function?
Hormones carry chemical messages around the body
Antibodies forms body structures
Cellulose provides strength and structure to a plant cell wall
Structural proteins are part of our immune system
What amount of living cells produce enzymes?
All
Most
Some
A few
Which line in the table correctly shows information about an enzyme?
A
B
C
D
Which number in the diagram shows the active site?
1
2
3
4
5
The diagram below shows three stages X, Y and Z that occur when an enzyme converts a substrate into a product. Which of the following order of stages represents a synthesis reaction?
Z-> Y -> X
X -> Y -> Z
X-> Z -> Y
Z-> Y-> X
The diagram below shows three stages X, Y and Z that occur when an enzyme converts a substrate into a product. Which of the following order of stages represents a
degradation reaction?
Z -> Y -> X
Y -> Z -> X
X-> Z-> Y
Y-> Z-> X
Which of the following is not an example of a protein?
Starch
Antibodies
Enzymes
Hormones
What determines the shape of a protein?
The amino acid sequence of a protein
The function the protein carries out
The location in the cell where protein is assembled
What is the name of a substance that speeds up the rate of a chemical reaction, but is unchanged in the process?
Catalyst
Active Site
Product
Substrate
Which word describes the relationship between the shape of the active site of an enzyme and the shape of its specific substrate?
Complementary
Denatured
Optimum
Strong
What effect does denaturation have on the activity of an enzyme?
Increased
Decreased
No change
The graph shows that enzymes are able to function within a working range. From the graph, identify the optimum pH of the enzyme.
2
7
12
4
Which of the following are all types of protein?
Hormones, enzymes and nitrates
Antibodies, enzymes and plasmids
Hormones, receptors and antibodies
Receptors, antibodies and nitrates
True or False: Catalase is responsible for the breakdown of hydrogen peroxide.
True
False
Which of the following are the products of the degradation reaction between hydrogen peroxide and the enzyme catalase?
water and oxygen
water and carbon dioxide
hydrogen peroxide and water
hydrogen and oxygen
Describe the function of an enzyme.
Chemical messengers
Provides structure and support
Biological catalyst
Part of immune system.
Proteins are made up of smaller sub-units called..
Bases
DNA
Amino acids
Fats
Which type of protein forms part of our immune system?
Structural
Enzyme
Hormones
Antibodies
Receptor
What term is used to describe a breakdown reaction?
(a)
What is the substrate for the enzyme amylase?
Maltose
Starch
Hydrogen peroxide
Phosphorylase
Which enzyme catalyses the synthesis reaction of glucose-1-phosphate molecules into starch?
Amylase
Catalse
Pepsin
Phosphorylase
The part of an enzyme that one or more substrates molecules can attach to is called the ________ _____.
(a)
What word best describes the chemical upon which an enzyme will act?
(a)
The ideal condition an enzyme works at is known as the (a) .
When an enzyme's active site has irreversibly changed shape, the enzyme is said to have become
(a)
Which of the following effects enzyme activity? Select all that apply.
Size of the enzyme
Light
pH
Temperature
Which of the following is true about the term "denatured'. Select all that apply.
It occurs at low temperatures
It occurs at high temperatures
It is an irreversible change in the shape of an enzyme
It is the point where an enzyme is working most efficiently
An example of a structural protein is..
Amylase
Insulin
Membrane protein
Hair, nails and muscle
True or False: An degradation reaction is a build up reaction
True
False
