In stage 2 of photossynthesis, nadp+ becomes nadph by adding an h+. where does the h+ come from?
a. splitting of water

b. "excited" electron

c. atp becomes adp

d. carbon fixation

in this equation for photosynthesis, where does the first reactant come from and what happens to it in the photosynthetic process?

6co2 + 6h20 -> c6h1206 +602

a. water is split to drive nadp to nadph conversion, which is formed in the calvin cycle

b. carbon dioxide from the air is broken down in the calvin cycle

c. gluecose is formed right after the calvin cycle

d. oxygen is released as a gas after water is split.

me!

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.