Leaving Cert Biology Photosynthesis

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

What is the function of NADP+?

• It absorbs light

• It is an electron carrier

• It is a light-reflecting pigment

• It acts as long-term energy storage

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

Where does the carbon come from that is used to form glucose?

• The soil

• CO₂ in the air

• From other carbohydrates

• Calvin Cycle

Tags

NGSS.HS-LS2-5

Where does the Calvin cycle take place?

• stroma of the chloroplast

• thylakoid membrane

• outer membrane of the chloroplast

• interior of the thylakoid membrane

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

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

What is the primary function of the Calvin cycle?

• regenerate ATP for use in the light reactions of photosynthesis
• produce carbon dioxide for use in the light reactions of photosynthesis
• produce oxygen by oxidizing water
• produce simple sugars from carbon dioxide

How many sugar molecules are produced from every six molecules of carbon dioxide that enter the Calvin cycle?

• 1

• 3

• 6

• 12

Tags

NGSS.HS-LS2-5

Photosynthesis goal is to

• convert light energy into glucose energy

• use light energy to make oxygen gas

• convert sugar energy into ATP

• convert sugar energy into oxygen gas

Tags

NGSS.HS-LS1-5