Photosynthesis Overview

What is the primary purpose of photosynthesis?

• To convert light energy into chemical energy stored in glucose

• To produce carbon dioxide

• To break down glucose into energy

• To absorb oxygen from the atmosphere

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Where does photosynthesis primarily take place in plant cells?

• In the chloroplasts

• In the mitochondria

• In the nucleus

• In the cell membrane

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What are the two main stages of photosynthesis?

• Light reactions and dark reactions

• Carbon fixation and reduction phase

• ATP synthesis and NADPH formation

• Glucose formation and oxygen release

Which molecule is NOT a direct product of the light reactions?

• Glucose

• ATP

• NADPH

• Oxygen

What enzyme catalyzes the first step of the Calvin cycle?

• RuBisCO

• ATP synthase

• NADP+ reductase

• Chlorophyll

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What is the role of chlorophyll in photosynthesis?

• To capture light energy

• To split water molecules

• To transport electrons

• To synthesize glucose

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How many turns of the Calvin cycle are required to produce one molecule of glucose?

• Six

• Three

• Nine

• Twelve

Light is required for the light dependent reactions because

• it is the source for electrons

• it energizes electrons in photosynthetic pigments

• it splits the water molecule

• 
  it splits ATP molecules which generates the energy necessary to power the light independent reactions

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The electrons lost from chlorophyll during the light reactions are replaced by ______, which is given off as the byproduct _____.

• water; oxygen
• nitrogen; ammonia
• glucose; water
• carbon dioxide; glucose

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Check multiple answers.

The energy from chlorophyll's electrons is used to create _____ and _____ during the light reactions.

• ATP

• NADPH

• FADH₂

• glucose

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