C TEST
monosaccharides.
BIOLOGY ASSESSMENT
D
Chapter 4 (Version 1) amino acids.
Name:
Date:
Class:
Instruction: For each of the Questions 1 to 30, choose the correct answer for each question from the
four options A, B, C and D.
1.
Which substance is made up of amino acids?
A
B
C
D
2.
5.
Which type of carbohydrate is found in large
quantities in the liver?
A
B
C
D
3.
Fats
Pepsin
Urea
Glycogen
Starch
Glucose
Sucrose
Glycogen
The diagram shows the effect of enzyme X on
starch.
Which of the following is not true about
saturated and unsaturated fats?
A Saturated fats contain more cholesterol
than unsaturated fats.
B Saturated fats do not have double bonds
while unsaturated fats have at least one
double bond.
C Saturated fats have less hydrogen atoms
compared to unsaturated fats.
D Saturated fats are solids while
unsaturated fats are liquids at room
temperature.
6.
In which of the following test tubes will the
enzyme pepsin act optimally?
What is enzyme X and substrate Y?
A
B
C
D
4.
Enzyme X
Amylase
Amylase
Maltase
Maltase
Substrate Y
Reducing sugar
Non-reducing sugar
Reducing sugar
Non-reducing sugar
Starch and cellulose are substances that are
made up of many units of
A
B
fatty acids.
glycerol.
A
B
C
D
7.
K
L
M
N
Inorganic
compounds
are
chemical
compounds that do not contain the element
A
B
C
D
hydrogen.
carbon.
oxygen.
nitrogen.
8.
There are four levels of organisation in protein
structure. Which protein is formed when a
polypeptide chain is coiled to form an alphahelix or folded into beta-pleated sheets?
A
B
C
D
12. The diagram shows the mechanism of enzyme
action.
Primary structure
Secondary structure
Tertiary structure
Quarternary structure
What does P represent?
9.
Potato cells contain an enzyme that can
hydrolyse hydrogen peroxide to oxygen. Four
sets of experiments were set up using the
apparatus as shown below.
A
B
C
D
Enzyme
Substrate
Enzyme-substrate complex
Products of the reaction
13. If salivary amylase takes 10 minutes to digest
0.2g of starch at 20oC. How much starch
would it digest in 10 minutes at 30oC?
A
B
C
D
Which of the following experiment will
release the most oxygen?
A
B
C
D
Amount of
hydrogen
peroxide
solution
5 cm3
5 cm3
5 cm3
10 cm3
Number of
potato discs
Condition of
the potato
discs
5
10
10
10
Boiled
Fresh
Boiled
Fresh
0.1 g
0.3 g
0.4 g
0.5 g
14. What is the main component of the cell wall
of plant cells?
A
B
C
D
Lignin
Cellulose
Pectin
Chitin
15. The diagram shows a basic unit of chemical
compound in a living cell.
10. Lactose is made of
A
B
C
D
11.
two fructose molecules.
two glucose molecules.
one glucose molecule and one fructose
molecule.
one glucose molecule and one galactose
molecule.
The following are functions of water except
A
water is the transport system in the
blood, excretory and digestive systems.
water acts as a medium for biochemical
reactions.
C
D
water helps in lubrication.
water supplies energy to the cell.
Which chemical compound has the unit shown
above?
A
B
C
D
Protein
Nucleic acid
Lipid
Carbohydrate
16. Excess carbohydrates is stored in the animal
cells as
A
B
C
starch.
glycogen.
fats.
D glucose.
17. Which of the following is not a carbohydrate?
A
B
C
D
Chitin
Cellulose
Keratin
Lignin
18. The equation shows a reaction catalysed by an
enzyme.
23. Proteins are made up of the elements
A
B
C
D
24. Which of the following is not true about
enzymes?
A
What is a general characteristic of the
enzyme?
A
B
C
D
The action of enzyme is specific.
The action of enzyme is controlled by the
substrate concentration.
The action of enzyme is reversible.
Enzymes are not used up or destroyed in
the reactions that they catalyse.
19. The action of amylase on starch forms
A
B
C
D
maltose.
sucrose.
lactose.
glycogen.
carbon, hydrogen and oxygen.
carbon, hydrogen, oxygen and nitrogen.
carbon, oxygen and nitrogen.
nitrogen and hydrogen.
B
C
D
Enzymes are denatured at temperatures
above 60oC.
Enzymes can catalyse chemical
reactions.
All enzymes react optimally at a neutral
pH.
Reaction of enzymes is reversible.
25. Proteins are made up of basic units or
monomers called
A
B
C
D
monosaccharides.
amino acids.
nucleotides.
glycerol.
26. The diagram shows the formation of a
molecule of fats.
20. A triglyceride molecule is made up of
A
B
C
D
amino acids.
three glucose molecules.
one molecule of glycerol and three
molecules of fatty acids.
three glycerol molecules.
21. Fats are also known as
A
B
C
D
monosaccharide.
glycerol.
fatty acid.
triglycerides.
22. A small amount of enzymes can act on a large
amount of substrate because
A
B
C
D
enzymes do not change after a reaction
and can be used again.
a little enzyme can supply enough energy
to carry out a reaction.
as the reaction is going on, more
enzymes are produced.
enzymes act in a all or none situation.
What does X and Y represent?
A
B
C
D
X
Fatty acid
Glycerol
Fats
Glycerol
Y
Glycerol
Fatty acid
Glycerol
Fats
27. Excess amino acids cannot be stored in the
body. They are broken down by a process
known as
A
B
C
D
hydrolysis.
reduction.
deamination.
decomposition.
28. The diagram shows a nucleotide unit.
What does X, Y and Z represent?
X
Y
Z
A Nitrogenous Deoxyribose
Phosphate
base
sugar
group
B Deoxyribose Phosphate Nitrogeneous
sugar
group
base
C Phosphate Nitrogenous Deoxyribose
group
base
sugar
D Phosphate Deoxyribose Nitrogenous
group
sugar
base
29. Enzymes are
A
B
C
D
fats.
proteins.
carbohydrates.
proteins and carbohydrates.
30. The enzyme rennin is used in industry to
A
B
C
D
coagulate milk proteins.
coagulate yoghurt.
concentrate cheese.
ripen cheese.
