Photosynthesis Quiz

What is the primary function of the light-dependent reactions in photosynthesis?

• To absorb carbon dioxide

• To break down glucose

• To produce glucose directly

• To convert light energy into chemical energy

Where do the light-independent reactions, also known as the Calvin cycle, take place?

• In the chloroplast stroma

• In the cell nucleus

• In the thylakoid membrane

• In the mitochondria

Which pigment is responsible for the green color of leaves and plays a crucial role in photosynthesis?

• Chlorophyll

• Xanthophyll

• Carotene

• Anthocyanin

What is the role of photosystem II in the electron transport chain?

• To split water molecules and release oxygen

• To convert NADP+ to NADPH

• To synthesize ATP directly

• To produce glucose

Which molecule acts as a mobile electron carrier in the electron transport chain?

• ATP

• NADPH

• Plastoquinone QB

• Glucose

What is the main purpose of the proton gradient in the thylakoid lumen?

• To produce oxygen

• To drive the synthesis of ATP

• To absorb light energy

• To convert glucose to starch

During the Calvin cycle, what is the role of the enzyme rubisco?

• To transport electrons

• To split water molecules

• To convert ATP to ADP

• To fix carbon dioxide into an organic molecule

How many rounds of the Calvin cycle are needed to produce one molecule of glucose?

• Six

• Four

• Eight

• Two

What is the ultimate product of the Calvin cycle that can be used to build glucose?

• ATP

• NADPH

• G3P

• RuBP

Why is rubisco considered inefficient in the Calvin cycle?

• It requires too much energy

• It sometimes confuses oxygen for carbon dioxide

• It only works in the dark

• It produces too much glucose