Which organelle may often be referred to as the "gate keeper" because it controls what goes in and out of the cell?
• A. the cytoplasm
• B. the nucleus
• C. the cell membrane
• D. the mitochondrion
C. the cell membrane
Plants gather the suns energy with light-absorbing molecules. What are these molecules called?
• A. pigments
B. thylakoids
C. chloroplasts
• D. glucose
A. pigments
Which organelle is responsible for taking in nutrients, breaking them down, and creating energy rich molecules?
• A. the mitochondrion
• B. the Golgi apparatus
• C. the nucleus
• D. the vacuole
A. the mitochondrion
Why do all plant cells contain chloroplasts?
• A. Chloroplasts are necessary for cellular respiration.
• B. Chloroplasts are necessary for photosynthesis.
• C. Chloroplasts are necessary for reproduction.
• D. Chloroplasts are necessary for growth.