11. A cyclic electron transport process is the characteristic of

A. photosynthesis
B. methane oxidation
C. sulfide oxidation
D. methane production

12. In oxygenic photosynthesis, the electron donor is

A. water
B. oxygen
C. NADH
D. NADPH

13. The followings are the products of the light reactions of photosynthesis except

A. ATP
B. oxygen
C. NADPH
D. glucose

14. The vast majority of the molecules that act as energy carriers to power cellular activities are made in

A. the nucleus
B. the Golgi apparatus
C. the cytosol
D. the mitochondria and chloroplasts

15. Which of the following statements about energy metabolism is false?

A. The energy that powers living systems ultimately comes from the sun
B. All animals in some way rely on plants for their energy
C. Plants provide the water and CO₂ that animals need to carry out respiration
D. All eukaryotic organisms carry out respiration in the presence of O₂