4. Describe three functions of triacylglycerols in mammals and one function in higher plants (10%)

3. Please describe the similarities and differences between oxidative phosphorylation and photophosphorylation?
(16%)

2. Please describe why light is essential for the dark reaction (Calvin cycle) of photosynthesis? (8%)

20. In an equilibrium biochemical reaction of A+B+C+D, dG=-10 kj/mole What will the final content in the reaction? (A) A+B＞C+D Applying what you known 40% (B)C+D＞A+B (C)only contain C and D (D)only contain A and B

19. The major component of cell membrane is the phospholipids bilayer. Therefore, the fluidity of cell membrane could be generally increased by: (A) a decrease in temperature. (B) an increase in fatty acyl chain length. (C) an increase in the number of double bonds in fatty acids. (D) an increase in the percentage of phosphatidyl ethanolamine (E) the binding of water to the fatty acyl side chains.

18. There is reciprocal regulation of glycolytic and gluconeogenic reactions interconverting fructose-6-phosphate and fructose-1,6-bisphosphate. Which one of the following statements about this regulation is not correct? (A) Fructose-2,6-bisphosphate activates phosphofructokinase-1. (B) Fructose-2,6-bisphosphate inhibits fructose-1,6-bisphosphatase. (C) The fructose-1,6-bisphosphatase reaction is exergonic. (D) The phosphofructokinase-1 reaction is endergonic. (E) This regulation allows control of the direction of net metabolite flow through the pathway.