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BIOLOGY FORM 4 ENZYMES

Total questions: 30

Worksheet time: 30mins

Name
Class
Date
1.

Rajah 1 menunjukkan sebahagian sistem alimentari di dalam manusia.

Antara bahagian berikut, yang manakah menghasilkan hempedu?

Diagram 1 shows a part of the alimentary canal in human.

Which of the following parts produces bile?

a)

P

b)

Q

c)

R

d)

S

2.

Rajah 2 menunjukkan sebahagian daripada salur alimentari manusia.

Antara struktur berikut, yang manakah terlibat dalam pencernaan lemak?

Diagram 2 shows a part of the human alimentary canal.

Which of the following structure in involved in the digestion of fats.

a)

R dan S

R and S

b)

Q, R dan S

Q, R and S

c)

P, S dan R

P, S and R

d)

P, R dan Q

P,R and Q

3.

Antara enzim berikut, yang manakah disintesis di pankreas?

Which of the following enzyme is synthesised in pancrease?

a)

Sukrase

Sucrase

b)

Pepsin

Pepsin

c)

Amilase

Amylase

d)

Renin

Rennin

4.

Antara vitamin berikut, yang manakah tidak terdapat dalam lakteal?

Which of the following vitamins are not found in lacteal?

a)

Vitamin A

b)

Vitamin B

c)

Vitamin D

d)

Vitamin K

5.

Rajah 3 menunjukkan struktur hati.

Antara proses berikut, yang manakah berlaku dalam hati?

Diagram 3 shows the structure of a liver.

Which of the following processes occurs in a liver?

a)

Penyerapan

Absorption

b)

Penyahtinjaan

Defaecation

c)

Pencernaan

Digestion

d)

Penyahtoksikan

Detoxification

6.

Antara yang berikut, yang manakah fungsi glukosa yang diasimilasikan oleh sel?

Which of the following is the function of assimilated glucose in cell?

a)

Penghasilan enzim

Production of enzyme

b)

Penghasilan tenaga

Production of energy

c)

Membaiki tisu yang rosak

Repairing damage tissue

d)

Pembentukan membran plasma

Formation of plasma membrane

7.

Antara salur darah berikut, yang manakah mengangkut lipid dari usus kecil ke jantung?

Which of the following blood vessels involved in transporting lipid from the small intestine to the heart?

a)

Aorta / Aorta

b)

Vena portal hepar / Hepatic portal vein

c)

Vena pulmonari / Pulmonary vein

d)

Vena subklavikel / Subclavian vein

8.

Apakah yang akan berlaku kepada hasil sampingan proses deaminasi?

What will happen to the product of deamination process?

a)

Disimpan dalam sel

Stored in cells

b)

Dikumuhkan oleh ginjal

Excreted out by kidney

c)

Dikembalikan semula ke dalam usus kecil

Return back to small intestine

d)

Bertindak sebagai komponen utama enzim

Act as main component of enzyme

9.

Antara yang berikut, yang manakah fungsi serat dalam makanan?

Which of the following, is the function of fibre in food?

a)

Mencegah penyakit

Prevent disease

b)

Merangsang peristalsis

Stimulate peristalsis

c)

Memberikan warna pada tinja

Give colour to faeces

d)

Menjadikan makanan lebih lama dalam usus

Make food stay longer in intestine

10.

Antara penyakit berikut, yang manakah berkaitan dengan masalah penyahtinjaan?

Which of the following disease is related to defaecation?

a)

Gastrik

Gastritis

b)

Obesiti

Obesity

c)

Aneroksia nervosa

Anorexia nervosa

d)

Hemoroid

Haemorrhoids

11.

What is a substance called if it speeds up a chemical reaction?

a)
reusable
b)
catalyst
c)
specific
d)
fragile
12.

With what 3 letters do enzymes typically end?

a)
-ose
b)
-ase
c)
-ese
d)
-tic
13.

Enzymes are an example of

a)

Lipids

b)

Carbohydrate

c)

Protein

d)

Nucleic Acid

14.

Each enzyme only has 1 substrate that will fit its active site.  What is this called?

a)
reusable
b)
catalyst
c)
specific
d)
fragile
15.

In the diagram, what is letter A? 

a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
16.

Letter D...

a)
active site
b)
enzyme
c)
substrate
d)
products
17.

Letter B...

a)
active site
b)
enzyme
c)
substrate
d)
products
18.

Letter C...

a)
active site
b)
enzymes
c)
substrate
d)
products
19.

Letter E...

a)
active site
b)
enzyme
c)
substrate
d)
products
20.

An enzyme speeds up a reaction by

a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
21.

What happens when enzymes are heated to a high temperature?

a)

The enzymes die.

b)

The shape of the enzyme are changed and it denatures

c)

The enzymes' amino acid sequence changes.

d)

The enzymes remain the same

22.

The molecule an enzyme is working on is called the:

a)
Substrate
b)
Solvent
c)
Allosteric Inhibitor
d)
CoEnzyme
23.

Which of these is NOT true?

a)
Enzymes can denature (change shape) when the temperature gets too high.
b)
Enzymes can only be used once in a chemical reaction. 
c)
Extreme pH can denature enzymes.
d)
Enzymes speed up chemical reactions. 
24.

Based on the graph, what temperature does this enzyme work best? 

a)
15 C
b)
40 C
c)
30 C
d)
47 C
25.

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

a)
Enzymes increase the energy of the reactants.
b)
Enzymes decrease the energy level of the products.
c)
Enzyme decrease the activation energy of the reaction.
d)
Enzymes reverse the direction of the reaction.
26.

What is the function of an enzyme?

a)
enzymes break themselves into small pieces
b)
enzymes slow down chemical reactions
c)
enzymes speed up chemical reactions
d)
enzymes combine products to form reactants 
27.

Enzymes will make a reaction go _______ and use ______ energy.

a)
faster, less
b)
faster, more
c)
slower, less
d)
slower, more
28.

What happens to an enzyme when it is denatured?

a)
Activation energy is lowered.
b)
It becomes stronger.
c)
It loses its shape.
d)
Activation energy is raised.
29.

Every enzyme has a optimal temperature and pH. True or False?

a)
True 
b)
False
30.

Enzymes are composed of which of the following monomers? 

a)
amino acids
b)
carbohydrates
c)
nucleotides
d)
monosaccharides