Unit 4 - Plants & Cell Processes Test Review

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy stored in glucose, using carbon dioxide and water.

Front

What is the role of molecular oxygen (O2) in photosynthesis?

Back

Molecular oxygen (O2) is a product of photosynthesis that is released into the atmosphere.

Front

What is ATP and its role in energy transfer?

Back

Adenosine triphosphate (ATP) is a molecule that stores and transfers energy within cells. Energy is released when ATP is converted to adenosine diphosphate (ADP) by detaching a phosphate group.

Front

What is the function of guard cells in plants?

Back

Guard cells control the opening and closing of stomata, regulating gas exchange and transpiration in leaves.

Front

What happens to carbon dioxide levels in a closed environment with aerobic microbes and glucose?

Back

The carbon dioxide level will increase as the microbes metabolize glucose, producing carbon dioxide as a byproduct.

Front

What is the effect of a lack of carbon dioxide on a potted plant in a sealed container?

Back

The potted plant will die after 3 days because it has no carbon dioxide to use as a reactant in its photosynthetic reactions.

Front

What are the reactants of photosynthesis?

Back

The reactants of photosynthesis are carbon dioxide (CO2) and water (H2O), which are used to produce glucose and oxygen.

Front

What is the significance of chlorophyll in photosynthesis?

Back

Chlorophyll is the green pigment in plants that absorbs light energy, primarily from the sun, which is essential for photosynthesis.

Front

What is cellular respiration?

Back

Cellular respiration is the process by which cells convert glucose and oxygen into energy (ATP), carbon dioxide, and water.

Front

How do plants obtain water for photosynthesis?

Back

Plants absorb water through their roots from the soil, which is then transported to the leaves for photosynthesis.