Using a microscope, a student observes a small, green organelle in a plant cell. Which energy transformation most likely occurs first within the observed organelle?
ATP to light
light to chemical
heat to electrical
chemical to chemical
Photosynthesis and cellular respiration are two major processes of carbon cycling in living organisms. Which statement correctly describes one similarity between photosynthesis and cellular respiration?
Both occur in animal and plant cells
Both include reactions that transform energy
Both convert light energy into chemical energy
Both synthesize organic molecules as end products
The principal chemical compound that living things use to store energy is…
DNA
Water
ATP
Carbon dioxide
In addition to light and chlorophyll, photosynthesis requires…
Water and Oxygen
Water and Sugars
Oxygen and Carbon Dioxide
Water and Carbon Dioxide
Which of the following correctly summarizes the process of photosynthesis?
A
B
C
D
The process that releases energy from food in the presence of oxygen is called…
Synthesis
Cellular Respiration
ATP synthase
Photosynthesis
The Krebs cycle of cellular respiration takes place in the…
Chlorplast
Nucleus
Mitochondrion
Cytoplasm
Which of the following correctly summarizes the process of cellular respiration?
water + oxygen –> carbon dioxide + sugar
carbon dioxide + sugar –> oxygen + water + energy
oxygen + carbon dioxide + water –> sugar + energy
oxygen + sugar –> carbon dioxide + water + energy
Which statement best describes why photosynthesis and respiration are often considered opposites?
Photosynthesis makes sugar and respiration splits sugar for energy
Both photosynthesis and respiration happens in plants
Respiration happens in plants and photosynthesis happens in animals
Respiration uses CO2 and photosynthesis used O2
Which letter in the diagram would represent carbon dioxide?
A
B
C
D
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