The Calvin Cycle

What molecule enters the Calvin cycle?

• Carbon dioxide

• Oxygen

• Glucose

• Water

How many cycles are needed to produce 1 molecule of glucose?

• 1 cycle

• 3 cycles

• 6 cycles

• 12 cycles

Which part of the Calvin cycle uses energy from ATP?

• Reduction of GP to triose phosphate

• RuBP reacting with carbon dioxide

• Production of water

• Oxidation of RuBP

The enzyme _______ is needed for RuBP to react with carbon dioxide.

How many carbon atoms are in RuBP?

• 4

• 6

• 5

• 3

What does RuBP stand for?

• rubiscon bisphosphate

• rubisco enzyme phosphate

• Are you biology pro

• ribulose bisphosphate

Put the steps of the Link Reaction into the correct order in which they occur.

• GP is reduced using NADPH and ATP

• This produces NADP which can be used in the LDR

• Triose phosphate can be recycled into RuBP, or go towards making glucose.

• RuBP reacts with CO2

• ...this is catalysed by the enzyme rubisco

Match the reactants with their products

• 2 x triose phosphate

• NADPH

• 2 x Glycerate 3-phosphate

• ATP

• NADP+

• 2 x Glycerate 3-phosphate reduced into...

• ADP + Pi

• Unstable 6C molecule

• Unstable 6C molecule

• Carbon dioxide + RuBP

How many molecules of glucose are produced for each cycle of the Calvin cycle?

• 1/6

• 1

• 6

• 0.6

What is the majority of the triose phosphate produced in the Calvin cycle used for?

• to produce glucose

• recycled for into reactants for the LDR

• recycled into RuBP

• to produce pyruvate