中三 生物試卷 (F3 Biology Past Paper)

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內容節錄：
A. Multiple Choice Questions (9 marks)
Directions: Questions 1 and 2 refer to the diagrams below, which show four types of teeth and their
positions in the lower jaw of a young. adult.
With reference to the above diagrams, which of the following dental formulac correctly describes the
dentition of the individual?
(3) and (6) only.
(2), (3) and (6) only.
The total number of tooth type (3) in the milk dentition is
4. Which labelled part(s) of the digestive system
produce(s) enzymes for the digestion of carbohydrates?
(5) and (6) only
(1), (5) and (6) only
(1) and (2) only
(2) and (3) only
Which of the following are the functions of organ (1)?
(1) It stores iron and vitamins.
(2) It breaks down old red blood cells.
(3) It produces lipases for the digestion of lipids.
Directions: Questions 3 to 5 refer to the diagram below, which shows the digestive system in humans.
3. Peristalsis occurs in
(2) and (3) only.
B (1) and (3) only
D (1), (2) and (3)
Which of the following statements about bile is correct?
It increases the pH of chyme.
It contains enzymes that break down lipids.
It is produced by the gall bladder.
It is secreted into the ilcum.
The diagram below shows the cross section of a villus in the
small intestine.
Which of the following correctly indicates the substances that
can be found in vessels P and Q?
fine lipid droplets
fatty acids
8. Lipids absorbed in the small intestine are first transported to the
B gall bladder.
C large intestine.
starch agar plate
boiled salivary
fine lipid droplets
In an experiment, four wells are made in a starch agar plate and each well is filled with a different
solution, as shown in the diagram below.
(a) Incisor
(c) Premolar
The agar plate is then incubated at 40 °C in an incubator for 120 minutes. Which of the wells will have
the largest clear zone after the plate is flooded with iodine solution?
B. Structural Questions (18 marks)
For each of the types of teeth listed in column 1, select from column 2 one statement that best describes
it. Put the appropriate letter in the space provided.
salivary amylase +
dilute hydrochloric acid
salivary amylase +
dilute sodium hydroxide
salivary amylase +
distilled water
It is chisel-shaped.
It has one or two roots and is for grinding.
It is used for tearing flesh
Four of them are also known as wisdom teeth
2. The diagram below shows a tiny structure found in ilcum.
(a) Name the structure.
(b) Describe one observable adaptation of the structure and explain how
it can facilitate the absorption of food substances. (2 marks)
3. The table below shows the relative amount of fatty acids and amino acids along the alimentary canal
after a meal.
Region of the
alimentary canal
Fatty acids
(ii) ileum.
(a) Name the action that helps moving food along the alimentary canal.
* increase / decrease
* increase / decrease
(c) Explain the changes in the amounts of fatty acids in the
(1) duodenum.
Amino acids
(b) Complete the table to show the changes in the amounts of fatty acids and amino acids in the duodenum
and the ileum.
* increase / decreasc
* increase / decrease
4. The diagram below shows the blood supply to part of the digestive system,
(a) Name vessel B.
small intestine
(b) Which blood vessel has the highest amount of glucose after a meal?
(c) (i) Describe how excess glucose absorbed is metabolized in the liver.
(ii) Describe how the amino groups of excess amino acids absorbed are metabolized in the liver.
Multiple-choice questions
Conventional questions
(a) villus (1)
3. (a) peristalsis(1)
The epithelium is thin/one-cell-thick, (1)
which shortens the diffusion distance. (1)
There is a network of capillary, (1)
which allows absorbed food molecules to be transported away the rapidly. (1)
It is a finger like projection (1)
which increases the surface area for absorption of food. (1)
(c) (i) receive lipases from the pancreas (1)
Hepatic portal vein
fatty acids
lipases digest lipids to form fatty acids (1)
(ii) absorption of fatty acids (1)
(d) Liver breaks down excess amino acids to urca which is transported away through hepatic vein.
amino acids
Excess glucose is converted to glycogen in the liver
and stored in the liver.
The amino groups of excess amino acids are converted to urea.