Photosynthesis College Biology

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

• glucose

• CO2

• ATP and NADPH

• H2O

Tags

NGSS.HS-LS1-5

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

• thylakoid membrane

• outer membrane

• stroma

• thylakoid and stroma

Tags

NGSS.HS-LS1-5

The colors of light that are most effective for PSN are

• red, blue, violet

• green, yellow, orange

• infrared, ultraviolet

• all colors of light are equally effective

Tags

NGSS.HS-LS1-5

The colors associated with pigments such as chlorophyll or carotenoids are a product of

• the wavelengths of light absorbed by the pigment

• the wavelengths of light reflected by the pigment

• the energy transferred between pigments

• the wavelengths of light emitted by the pigment

Which of the following best describes a photosystem?

• clusters of pigment molecules

• pigments that transfer E from light to a reaction center pigment

• a collection of thylakoid membranes assembled into a granum

• chlorophyll molecules that capture light energy to make ATP

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

• Reaction center pigment is a chlorophyll molecule

• Antenna complex pigment can only reflect light

• Reaction center pigment loses e- when light energy absorbed

• Antenna complex pigments are not attached to proteins

What happens to the energy from an excited reaction center electron in the cyclic photophosphorylation?

• It is used to make ATP.

• It is used to phosphorylate proteins in an ETC.

• It is used to generate a new pigment molecule.

• It excites another pigment molecule within the photosystem.

Tags

NGSS.HS-LS1-5

During noncyclic photosynthesis, PSI functions to __ and PSII functions to ___.

• synthesize ATP; produce O2

• reduce NADP+; oxidize H2O

• reduce CO2; oxidize NADPH

• restore an e- to its reaction center; gain an e- from water

Where in a chloroplast would you find the highest concentration of protons?

• in the stroma

• in the lumen of the thylakoid

• in the intermembrane space

• in the antenna complex

How does the reaction center of PSI regain an electron during noncyclic photosynthesis?

• e- is recycled directly back to the reaction center pigment

• e- is donated to H2O

• e- is donated from PSII

• e- is donated from NADPH