Quiz 1
[94-II-2d] (P.125 #5 )
1.
Explain why protein is less efficient for energy production when compared with
(i)
lipid; and
(ii)
carbohydrate. (optional bonus)
(1 marks)
(1 marks)
[HKALE 82 I]
2.
Distinguish between starch and cellulose
(2 marks)
[GCE Nov. 92 Paper II] Q.2 (P.130 #26)
3.
The table below gives some figures for the metabolism of carbohydrate and lipid in a mammal.
Energy source
Metabolic energy
-1
Metabolic water
-1
Oxygen consumed /
produced / kJ g food
produced / g g food
dm3 g-1 food
Carbohydrate
17.2
0.56
0.83
Lipid
38.9
1.07
2.02
a.
Using the information given in the table above, state two advantages to mammals of
storing lipid rather than carbohydrates.
b. Suggest two other reasons why mammals might store lipids in preference to
carbohydrates.
4.
(4 marks)
The following diagrams represent the structure of some common carbohydrates.
(a)
5.
(2 marks)
Suggest a suitable name for each structure, A-D.
Use the following terms to construct a short description of chemicals that are found in
cells:
amino acid , hydrogen bond, helix structure, unbranched, β-glucose, chains
(4 marks)
[94-II-2d] (P.125 #5 )
1.
Explain why protein is less efficient for energy production when compared with
(i)
lipid; and
(ii)
carbohydrate. (optional bonus)
(1 marks)
(1 marks)
[HKALE 82 I]
2.
Distinguish between starch and cellulose
(2 marks)
[GCE Nov. 92 Paper II] Q.2 (P.130 #26)
3.
The table below gives some figures for the metabolism of carbohydrate and lipid in a mammal.
Energy source
Metabolic energy
produced / kJ g-1 food
Metabolic water
produced / g g-1 food
Oxygen consumed /
dm3 g-1 food
Carbohydrate
17.2
0.56
0.83
Lipid
38.9
1.07
2.02
a.
Using the information given in the table above, state two advantages to mammals of
storing lipid rather than carbohydrates.
b. Suggest two other reasons why mammals might store lipids in preference to
carbohydrates.
4.
(4 marks)
The following diagrams represent the structure of some common carbohydrates.
(a)
5.
(2 marks)
Suggest a suitable name for each structure, A-D.
Use the following terms to construct a short description of chemicals that are found in
cells:
amino acid , hydrogen bond, helix structure, unbranched, β-glucose, chains
(4 marks)