Biology
Test
Class: ___________( ) Name:
____________ Mark: _________
Section I: 30%
1. List the functions of different types of
teeth:
(i) incisor: biting
and cutting the food
(ii) canine: tearing flesh
(iii) molar: crushing and grinding
the food
2. Finish the following table to show the
chemical digestion:
Digestive glands
|
Digestive juices
|
Enzymes involved
|
Site of Action
|
Functions(actions) of the enzyme(s)
|
Saliva
|
Saliva
|
Salivary amylase
|
Mouth cavity
|
Starch - > maltose
|
Gastric gland
|
Gastric juice
|
pepsin
|
Stomach
|
Protein ->peptides
|
Pancreas
|
Pancreatic
juice
|
Pancreatic amylase
Pancreatic proteases
lipase
|
Duodenum
|
Starch -> maltose
Protein->peptides
->amino acid
|
Intestinal glands
|
Intestinal juice
|
Carbohydrases
proteases
|
ileum
|
Disaccharides ->
monosachharides
|
Section II: 70%
1. Fill in the blanks to show the relationship
between the features and functions:
Structures
|
Related features
|
Functions
|
Enamel
|
Hard / made
up of calcium salts
|
Protect the tooth from wearing
|
Pulp cavity
|
Contain blood vessels
|
Provide nutrient and oxygen to the tooth
|
Stomach
|
Contain hydrochloric acid
|
Kill bacteria in the food
|
Wall of alimentary canal
|
Contain mucus
|
Prevent the wall from digestion by proteases
|
2. List the name(s) of the digestive juices related to
the digestion of starch.
Saliva,
pancreatic juice
3. List the name(s) of the digestive glands related to the digestion
of protein.
Gastric
gland, pancreas, intestinal gland
4. List the site(s) in the alimentary canal where proteins
are digested
Stomach,
duodenum, ileum
5. List the site(s)
in the alimentary canal where carbohydrates are digested
Mouth cavity, duodenum
6. List the site in the alimentary canal where protein
begin to be digested
stomach
7. List the site in the alimentary canal where starch
begin to be digested
Mouth
cavity
8. List the site in the alimentary canal where lipids begin to be
digested
Duodenum
9. State the function of bile salt to digestion:
Emulsify
the large oil droplets to smaller ones
to increase the surface areas for the action of lipase
10 A cell belongs to a living
thing, should have all living characteristics. Fill in the blanks below to show the relationship
between the structures and the living characteristics.
Structures
|
Functions
|
Related living characteristics
|
Mitochondrion
|
Break down food to
provide energy
|
Respiration
|
Chloroplast
|
Carry out
photosynthesis
|
Nutrition
|
Vacuole
|
Collect metabolic wastes in plant cells
|
excretion
|
11. Explain the reason why taking in too much rice will
lead to overweight.
Rice
contain starch. Starch is carbohydrate. If taking in too much carbohydrate, the
excessive carbohydrate will change into lipid. The lipid will be stored under
the skin to make us overweight.
12. How to prove the presence of vitamin C in
orange juice?
Add the orange juice solution into the DCPIP
with fixed volume, if the colour of the DCPIP change from deep blue to orange
the orange juice solution contains vitamin C.
13. State the effect on digestion if the gall bladder is cut.
Bile is stored in the gall gladder, if the
gall bladder is cut, less bile will be secreted to the duodenum. As a result,
less lipid will be emulsified. The digestion of lipid will become less.
14. List
any 5 types of substances that are present in the faeces.
Unabsorbed substances, undigested
substances, dietary fibre, mucus, bacteria from the gut, digestive enzymes,
water, bile pigment, cells from the gut wall, remaining hydrochloric acid,
remaining hydrogencarbonate….
Any 5
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