2006 年

Questions 21 and 22 refer to the diagram below, which shows a set-up used to investigate the respiration of a mammal. The air pump was switched on for 20 minutes.

Which of the following correctly states the colour of the hydrogencarbonate indicator solution in flask A and flask B after 20 minutes?

Questions 21 and 22 refer to the diagram below, which shows a set-up used to investigate the respiration of a mammal. The air pump was switched on for 20 minutes.

If the air pump is switched off, which of the following graphs shows the breathing rate of the mammal for the next five minutes?

Questions 23 to 25 refer to the graph below, which shows the rates of reactions catalysed by two enzymes A and B over a range of pH values:

The rates of the reactions catalysed by enzymes A and B are equal at

Questions 23 to 25 refer to the graph below, which shows the rates of reactions catalysed by two enzymes A and B over a range of pH values:

Which of the following is a correct interpretation of the graph?

Questions 23 to 25 refer to the graph below, which shows the rates of reactions catalysed by two enzymes A and B over a range of pH values:

In the above study, it is important to keep the temperature at which the reactions occur constant because

Questions 26 and 27 refer to the photomicrograph below, which shows the cross section of a leaf:

Source: Department of Biology, 5500 University of Parkway, Biology Images, URL: http://bioimage.csusb.edu/leaf_cross_section.jpg

Which of the following correctly lists the functions of cell types W, X and Z?

The photomicrograph below shows the appearance of the epidermal cells of a plant after they have been immersed in a sugar solution for an hour. The cytoplasm of the epidermal cells contains a red pigment. The colour intensity and distribution of pigment of different cells vary due to different rates of water loss.

Source: Acadia University, Biodiversity of Plants and Algae Lab Images, URL: http://plato.acadiau.ca/courses/biol/Kristie/Biol2043/ The rate of water loss varies because

The following flowchart shows the main processes involved in human reproduction:

The contraceptive methods used at P, Q and R for birth control could be

Questions 30 and 31 refer to the diagrams of the human reproductive systems below.

Which of the following structures serve similar functions?