1997 年

Questions 11 to 13 refer to the diagram below which shows the human digestive system:

Digestive juices 1, 2 and 3 were collected from structures 1, 2 and 3 respectively. Small drops of these juices were put on a strip of film which was coated with protein as shown in the diagram below:

Questions 11 to 13 refer to the diagram below which shows the human digestive system:

Digestive juices 1, 2 and 3 were collected from structures 1, 2 and 3 respectively, and small drops of them were put on a strip of film coated with protein, as in Question 11:

If the digestive juices in question 11 were mixed with a buffer solution of pH 2 before putting them on the film, then the protein coat

Which of the following graphs correctly shows the change in volume of a red blood cell when it is put in 0.05% salt solution?

Questions 15 and 16 refer to the graph below which shows the net release and net uptake of oxygen of a plant over a 24-hour period:

Which of the following can be deduced from the graph?

Questions 15 and 16 refer to the graph below which shows the net release and net uptake of oxygen of a plant over a 24-hour period:

Assuming that the plant has the same respiration rate throughout the 24-hour period, how much oxygen is produced by the plant in an hour at 1660 hour?

Questions 17 and 18 refer to the diagram below which shows a section of a leaf:

Which cell types are green?

Questions 17 and 18 refer to the diagram below which shows a section of a leaf:

Respiration occurs in all cell types except

Which of the following changes will occur when a person is doing vigorous exercise?

The photomicrograph below shows the appearance of some human red blood cells:

The shape of the red blood cells allows them

Which of the following correctly shows the route of a red blood cell from the lung to the liver?