Honors Bio - Unit 5

Photosynthesis

Light “Photo” Reactions other names

light dependent reactions

Where is the LD?

thylakoid membrane

Purpose of the LD

capture light energy to make ATP; convert solar energy to chemical energy

Reactants of LD

sunlight, H20

Products of LD

ATP, O2, NADPH

What happens to water in LD?

It is split to replace the lost electrons from excited ones

Photosystem II?

Splits water to release O2, protons (H+), and electrons

Photosystem I

Accepts electrons from the electron transport chain and re-energizes them to produce NADPH

Carbon “Synthesis” Reactions other names

Light Independent Reactions; Dark Reactions

Where is the LI?

stroma

Purpose of LI

joins Co2 to make glucose

Reactants of LI

Co2, ATP, NADPH

Products of LI

Glucose

TRUE OR FALSE: LI directly needs sunlight

FALSE

What is the first step and second step of photosynthesis?

LD; LI

What do plants use the glucose for?

Making carbohydrates like lipids, proteins, and nucleic acid