Biology I-1: Ch. 8-9 Test

Plants gather energy with light-absorbing molecules called

• pigments.

• thylakoids.

• chloroplasts.

• glucose.

What are the three parts of an ATP molecule?

• adenine, ribose, and three phosphate groups

• adenine, thylakoid, and a phosphate group

• stroma, grana, and chlorophyll

• NADH, NADPH, and FADH2

Energy is released from ATP when

• a phosphate group is removed.

• a phosphate group is added.

• adenine bonds to ribose.

• ATP is exposed to sunlight.

What happens when chlorophyll is struck by sunlight?

• The electrons in the chlorophyll molecule become energized.

• The chlorophyll molecule is broken into two parts.

• A chemical reaction turns chlorophyll into high energy carbohydrates.

• Energy from fat molecules is released.

If carbon dioxide is completely removed from a plant's environment, what would you expect to happen to the plant's production of high-energy sugars?

• More sugars will be produced.

• No sugars will be produced.

• The same number of sugars will be produced but without carbon dioxide.

• Fewer sugars will be produced at first, but then the plant will recover.

How do organisms get the energy they need?

• by breaking down food molecules gradually and capturing their chemical energy

• by using the sun's energy to break down food molecules and form chemicals

• by breathing oxygen into the lungs and combining it with carbon dioxide

• by burning food molecules and releasing their energy as heat

Unlike photosynthesis, cellular respiration occurs in

• all eukaryotic cells.

• plant cells only.

• prokaryotic cells only.

• animal cells only.

What is the correct equation for cellular respiration?

• 6O₂ + C₆H₁2O₆ --> 6CO₂ + 6H₂O + Energy

• 6O₂ + C₆H₁₂O₆ + Energy --> 6CO₂ + 6H₂O

• 6CO₂ + 6H₂O --> 6O₂ + C₆H₁₂O₆ + Energy

• 6CO₂ + 6H₂O + Energy --> 6O₂ + C₆H₁₂O₆

Which of the following is the correct sequence of events in cellular respiration?

• glycolysis > Krebs cycle > electron transport

• glycolysis > fermentation > Krebs cycle

• Krebs cycle > electron transport > glycolysis

• Krebs cycle > glycolysis > electron transport

Photosynthesis is to chloroplasts as cellular respiration is to

• mitochondria.

• chloroplasts.

• cytoplasm.

• nuclei.