Photosystems

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

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.

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.

The electron carrier, NAPD+ picks up high energy electrons and a Hydrogen ion to form

• NADPH.

• another NADP+ molecule.

• the oxygen that is released as a by-product.

• ATP

Tags

NGSS.HS-LS1-5

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

• True

• False

What supplies the electrons that are lost in PS I?

• the electrons from PS II

• water

• glucose

• oxygen

Tags

NGSS.HS-LS1-5

Photosystems are made of

• chloroplasts

• chromosomes

• chlorophyll

• cytoplasm

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

What is the primary function of the light reactions of photosynthesis?

• To produce glucose

• To produce NADPH and ATP

• To use ATP

• To produce RuBP

When oxygen is released as a result of photosynthesis, it is a direct by-product of

• reducing NADP+

• splitting water molecules

• chemiosmosis

• electron transfer in photosystem II and I