IB Biology Photosynthesis

What is used to reduce NADP in the light dependent reactions of photosynthesis?

• Conversion of ATP into ADP +P_i

• Electrons from photosystem I

• Protons from the thylakoid space

• Oxygen from the photolysis of water

Which space has the highest H⁺ concentration in a chloroplast?

• Thylakoid space

• Stroma

• Intermembrane space

• Matrix

Which reactions do not cause a net release of energy?

• ADP combines with inorganic phosphate to form ATP

• ATP releases inorganic phosphate to form ADP

• Loss of hydrogen from reduced NAD

• Oxidation of reduced FAD

Tags

NGSS.HS-LS1-7

Which process occurs during the light dependent reaction of photosynthesis?

• ATP, CO₂ and H₂O are produced

• CO₂ is used to produce carbohydrates

• ATP and O₂ are produced

• RuBP is phosphorylated

Tags

NGSS.HS-LS1-5

Besides ATP and O₂, what other compound is produced as a result of the light dependent reactions?

• NADPH (reduced NADP)

• NADP⁺

• Glucose

• ADP

Tags

NGSS.HS-LS1-5

What feature of carbon makes it most suitable as a basis for life?

• It is abundant in nature

• Its bonding properties

• Its reactivity to light

• Its presence in the early atmosphere of Earth

What is reduced by photosystem I?

• ADP

• NADP

• NAD

• FAD

What is produced by chemiosmosis?

• ATP

• Oxygen

• Water

• Protons

Tags

NGSS.HS-LS1-7

Where does photoactivation of electrons take place

• Photosystems I and II

• Photosystem I only

• Photosystem II only

• Electron Transfer Chain

Tags

NGSS.HS-LS1-5

What is produced by the photolysis of two water molecules?

• O₂ + 4H⁺ + 4e^-

• O₂ + 4H⁺ + 2e^-

• ¹/₂ O₂ + 2H⁺ + 2e^-

• ¹/₂ O₂ + 2H⁺ + 4e^-