9/110 Week 1 Biology Revision Test
Biology revision test ch.6 2 mid-term exam Marks: /110 1. The following diagram shows two similar models simulating a region of the mammalian alimentary canal. The water in the test tubes surrounding the dialysis tubings was tested with standard food test reagents at the beginning of the experiment and again after one hour. The results showed that neither starch nor reducing sugar was present in the water surrounding tubes A and B at the beginning of the experiment. (7 marks) water bath at 37ºC starch + water starch + amylase + water dialysis tubing test tubes
A
B water bath at 37ºC starch + water starch + amylase + water dialysis tubing test tubes
A
B
(a) What results would be expected after one …show more content…
(1 mark)
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(c) What structure in the human body does the liquid surrounding the dialysis tubing represent? (1 mark)
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(d) If the experiment were repeated, with the two test tubes placed in a refrigerator instead of a water bath, how would you expect the results to differ? Explain your answer. (3 marks)
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State its/their sources and components involved in digestion. (6 marks)
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------------------------------------------------- ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- 6. The diagram below shows a certain region of the human digestive system. (15 marks) liver stomach gall bladder
C
A
B
liver stomach gall bladder
C
A
B
(a) Name structures A and B. (1 mark)
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(b) Name two substances present in the secretion secreted by stomach wall. (1 mark)
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(c) (i) Name the digestive and hormonal secretions of structure C. (2 marks)
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A
B water bath at 37ºC starch + water starch + amylase + water dialysis tubing test tubes
A
B
(a) What results would be expected after one …show more content…
(1 mark)
-------------------------------------------------
(c) What structure in the human body does the liquid surrounding the dialysis tubing represent? (1 mark)
-------------------------------------------------
(d) If the experiment were repeated, with the two test tubes placed in a refrigerator instead of a water bath, how would you expect the results to differ? Explain your answer. (3 marks)
------------------------------------------------- …show more content…
State its/their sources and components involved in digestion. (6 marks)
-------------------------------------------------
------------------------------------------------- ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- 6. The diagram below shows a certain region of the human digestive system. (15 marks) liver stomach gall bladder
C
A
B
liver stomach gall bladder
C
A
B
(a) Name structures A and B. (1 mark)
-------------------------------------------------
(b) Name two substances present in the secretion secreted by stomach wall. (1 mark)
-------------------------------------------------
(c) (i) Name the digestive and hormonal secretions of structure C. (2 marks)
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