Q1 M7 - ECOSYSTEM : LIFE ENERGY (PART I)

What is an autotroph? An autotroph is an organism that __________

• eats out of trough
• produces its own food
• cannot produce its own food

Where in the cell does photosynthesis take place?

• chloroplast
• cytoplasm
• mitochondrion
• nucleus

What are the two reactions that take place during photosynthesis?

• Krebs Cycle and Glycolysis
• Respiration and perspiration
• Light reaction and Calvin Cycle
• Intermediate reaction and beginning reaction

What does the chloroplast do during the process of photosynthesis?

• stores water
• control cellular activities
• transport glucose to the cell
• moves the energy into the cell

Plants make food by absorbing water and carbon dioxide. Which of the following substances is the origin of oxygen released as gas by green plants during photosynthesis?

• sugar
• carbon dioxide
• water
• ribulose-1, 5-biphosphate

Oxygen and carbon dioxide are gases that cycle out in the ecosystem. Which of the following gases is important to photosynthesis?

• ozone gas
• water vapor
• oxygen gas
• carbon dioxide

Plants are considered as food makers. In which of the following cell organelles does photosynthesis occur?

• chlorophyll
• chloroplast
• mitochondrion
• ribosome

How does temperature affect photosynthesis?

• Increases the rate at which enzymes work.
• Gives the plant energy to perform photosynthesis.
• Stops certain enzymes that interfere with photosynthesis.
• All of the above

Which of these will NOT affect photosynthesis?

• light
• carbon dioxide
• temperature
• glucose availability

If a plant receives more carbon dioxide, what happens to the rate of photosynthesis?

• increases
• stays the same
• decreases
• cannot be determined