Chapter 7: Photosynthesis

Which of the following equations represents photosynthesis?

• 6CO₂ + 6O₂ → C₆H₁₂O₆ + 6H₂O

• C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O

• C₆H₁₂O₆ + 6CO₂ → 6O₂ + 6H₂O

• 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

In which of the following organelles does photosynthesis take place?

• Nucleus

• Mitochondrion

• Central vacuole

• Chloroplast

What connects the two photosystems in the light reactions?

• An electron transport chain

• The Calvin cycle

• A chain of glucose molecules

• Chlorophyll

What two molecules are produced by the light reactions and used to power the Calvin cycle?

• G3P and H₂O

• ATP and NADPH

• C₆H₁₂O₆ and O₂

• C₆H₁₂O₆ and RuBP

What provides electrons for the light reactions?

• O₂

• Light

• H₂O

• CO₂

What provides the carbon atoms that are incorporated into sugar molecules in the Calvin cycle?

• RuBP

• Sucrose (C₁₂H₂₂O₁₁)

• Carbon dioxide (CO₂)

• G3P (C₃H₆O₃)

What transports electrons from the light reactions to the Calvin cycle?

• An electron transport chain

• FADH₂

• NADH

• NADPH

Photosynthesis occurs in the chloroplasts of a leaf. The first part of photosynthesis is called the light reactions, which begin with sunlight striking thylakoids within a chloroplast.

What molecules produced by the light reactions help drive the Calvin cycle?

• NADPH

• oxygen

• ATP

• water

• ADP

You design an experiment to monitor the amount of photosynthesis occurring in a common plant model organism, Arabidopsis thaliana.

If your hypothesis is correct that photosynthesis will increase in trial B, which change would you expect to find in the inputs and outputs of trial B?

• Less oxygen consumed

• Less oxygen produced

• More carbon dioxide consumed

• More water produced

Which of the following are photoautotrophs?

• corn stalks before harvest

• bacteria found in the human digestive tract

• deep-sea-vent organisms that make organic molecules using hydrogen sulfide as an energy source

• filamentous molds growing on bread