To replace fossil fuels, the world must find a way of producing fuel from renewable energy. one of the most promising fuels of the future is hydrogen, which could potentially be produced in algae using the power of sunlight. green algae contain enzymes (hydrogenases) that can convert hydrogen ions (h+) and electrons to hydrogen gas (h2). the hydrogen ions used by the hydrogenase come from

a- atp synthase.

b- water.

c- organic sugars.

d- atp.

e- rubisco.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.

after a the power stroke, adp is released, but the cross-bridge formed is still in place. atp then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.

the growth of the plants is affected by the heat of the light. what is the student doing?