Photosynthesis Light Reactions AP Biology

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

Tags

NGSS.HS-LS1-5

What supplies the electrons that are lost in PS I?

• the electrons from PS II

• water

• glucose

• oxygen

Tags

NGSS.HS-LS1-5

The light reactions occur in the ________ and the dark reactions take place in the ________.

• Chloroplast / thylakoid membrane

• stroma / thylakoid

• mesophyl / stomata

• thylakoid membrane / stroma

Tags

NGSS.HS-LS1-5

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

How does water split in the light dependent reaction?

• Into O2 that goes to the calvin cycle and the Hydrogens are released to the atmosphere

• Into 6O2 that is released into the atmosphere and the H+ get picked up by Atp. 

• Into 6O2 that is released into the atmosphere and the H+ gets picked up by NADP+ to carry to the light dependent cycle. 

• Into 6O2 that is released into the atmosphere and the H+ gets picked up by NADP+ to carry to the H+ to the Calvin cycle and to help create ATP. 

In the light-dependent reactions, which molecule is split to release oxygen?

• Carbon dioxide

• Glucose

• Water

• ATP

Light dependent reactions require energy from (a)   and occur in the ​ (b)   of the chloroplast. Light-independent reactions create ​ (c)   from ​ (d)   in the ​ (e)   .

• light

• thylakoid membrane

• sugars

• carbon dioxide

• stroma

• ATP

• NADPH

Tags

NGSS.HS-LS1-5

The goal of light-​dependent reactions is to produce the energy molecules ​ (a)   to be used later in light-independent reactions to make ​ (b)   .

• ATP & NADPH

• glucose

• ADP & NADP+

• oxygen

Tags

NGSS.HS-LS1-5

Where do the light dependent reactions occur?

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Which of the following best describes the light-dependent reactions of photosynthesis?

• They occur in the stroma and produce glucose.

• They occur in the thylakoid membranes and produce ATP and NADPH.

• They occur in the mitochondria and produce carbon dioxide.

• They occur in the cytoplasm and produce pyruvate.