The Chloroplast, Electron Carriers, and the Light Reactions

The chloroplast has __________ membrane(s).

• one

• two

• three

• four

The thylakoids, in the interior of the chloroplast, make up a membrane system.

• True

• false

Stacks of thylakoids are called ___________.

• granum

• grana

• stroma

• the inner membrane

Chlorophyll is _______________.

• a pigment

• embedded into the thylakoid membrane.

• a structural unit of photosynthesis.

• All of the above are correct.

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Clusters of pigments are

• photosystems.

• light collecting units of the chloroplast.

• green because they absorb only green wavelengths of light.

• Answers 1 and 2 are correct.

Tags

NGSS.MS-LS1-6

When sunlight hits the molecules of chlorophyll, the electrons in the chlorophyll molecules become very excited.

• True

• False

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

A high energy electron

• goes deep into the chloroplast.

• goes to an electron carrier.

• splits water.

• goes straight to the dark reaction to complete photosynthesis.

Tags

NGSS.HS-LS1-5

NADP+

• is an electron carrier.

• holds one high-energy electron.

• splits water and takes a hydrogen ion.

• goes to the electron transport chain.

NADPH carries high-energy electrons to chemical reactions elsewhere in the chloroplast.

• True

• False

The light-dependent reactions take place

• within the thylakoid membrane.

• in the stroma.

• in the inner membrane of the chloroplast.

• in the outer membrane of the stroma.

Tags

NGSS.HS-LS1-5