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You are watching: The ultimate source of energy to support most life on earth is _____.



Where go the Calvin bicycle occur?


Identify the chloroplast.


Identify the stroma.

chloroplasts an elaborate system of interconnected thylakoid membranes segregates the stroma native the thylakoid an are in the chloroplast.

Approximately what wavelength of light is best absorbed by chlorophyll a, the pigment the participates directly in the light reactions?

You obtain the pigments called carotenoids in her diet as soon as you eat carrots. Why execute carotenoids appear yellow and also orange?

Can friend tell from this absorption spectra whether red light is reliable in steering photosynthesis?

One cannot tell from this graph, but because chlorophyll a does absorb red light, we have the right to predict that it would be efficient in driving photosynthesis.


If just chlorophyll a were connected in the light reactions, would certainly blue irradiate (wavelength around 490 nm) be reliable in control photosynthesis?

The graph shows that chlorophyll a absorbs very little blue light, for this reason we can predict that blue light would certainly not it is in effective.

An activity spectrum plots the price of photosynthesis at various wavelengths of clearly shows light, and it mirrors that blue light with a wavelength of about 490 nm is efficient in driving photosynthesis. Based on this information and also the absorb spectra presented at left, what role may chlorophyll b and also carotenoids beat in photosynthesis?

These pigments room able to absorb an ext wavelengths of light (and thus an ext energy) than chlorophyll a alone have the right to absorb. As component of light-harvesting complexes in photosystems, they increase the range of light that have the right to be provided in the irradiate reactions.

Photophosphorylation The excitation of chlorophyll through light power initiates a chain of events that leader to ATP production.

True or false? The chemiosmotic hypothesis claims that the synthesis of ATP generates a proton gradient that leads to electron circulation through one electron transport chain.

According come the chemiosmotic hypothesis, what offers the energy that directly drives ATP synthesis?

Proton gradient A proton gradient throughout chloroplast and mitochondrial membranes cd driver ATP synthetic by the enzyme ATP synthase.

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True or false? The an ar of ATP synthase the catalyzes the production of ATP indigenous ADP and inorganic phosphate spans the chloroplastic membrane.

Chloroplast membrane vesicles are equilibrated in a simple solution the pH 5. The systems is then adjusted to pH 8. I m sorry of the adhering to conclusions can be attracted from these speculative conditions?