biology 107 photosynthesis

The light-dependent reactions of photosynthesis are responsible for the production of

ATP and NADPH.

The overall flow of electrons in the light reactions is from

H2O to NADPH.

Given that the C4 pathway gets around the problems of photorespiration, why don't all plants use it?

It also has an energetic cost.

If the thylakoid membrane became leaky to ions, what would you predict to be the result on the light reactions?

It would stop ATP production.

How is a reaction center pigment in a photosystem different from a pigment in the antenna complex?

The reaction center pigment loses an electron when it absorbs light energy.

Which of the following are similarities between the structure and function of mitochondria and chloroplasts

They both create internal proton gradients by electron transport. AND They both have a double membrane system.

Which region of a chloroplast is associated with the capture of light energy?

Thylakoid membrane

The excited electron from photosystem I

can be returned to the reaction center to generate ATP by cyclic photophosphorylation AND is replaced by an electron from photosystem II.

The ATP and NADPH from the light reactions are used

during the reactions of the Calvin cycle to produce glucose.

If the Calvin cycle runs through six turns

enough carbon will be fixed to make one glucose, but they will not all be in the same molecule

If you could measure pH within a chloroplast, where would it be lowest?

in the stroma

C4 plants initially fix carbon by

incorporating CO2 into oxaloacetate, which is converted to malate.

The carbon fixation reaction converts

inorganic carbon into an organic acid.

The colors of light that are most effective for photosynthesis are

red, blue, and violet.

During noncyclic photosynthesis, photosystem I functions to , and photosystem II functions to .

reduce NADP+ oxidize H2O

The overall process of photosynthesis

results in the reduction of CO2 and the oxidation of H2O.