Question

during photosynthesis and cellular respiration, plant cells carry out processes that involve both light energy and chemical energy. decide whether each description applies to light energy or to chemical energy. provided by food molecules used to rearrange the atoms in carbon dioxide and water during photosynthesis captured by chlorophyll used after cellular respiration to directly power cell growth

Explanation:

• Provided by food molecules: Food molecules contain chemical bonds. When these bonds are broken during cellular processes (like cellular respiration), the energy stored in them (chemical energy) is released. So this applies to chemical energy.
• Used to rearrange the atoms in carbon dioxide and water during photosynthesis: Photosynthesis uses light energy (captured by chlorophyll) to convert carbon dioxide and water into glucose and oxygen. The light energy is used to break and form new chemical bonds (rearrange atoms). So this applies to light energy.
• Captured by chlorophyll: Chlorophyll is a pigment in plant cells that absorbs light energy (specifically certain wavelengths of light). So this applies to light energy.
• Used after cellular respiration to directly power cell growth: Cellular respiration breaks down glucose (a food molecule) and converts the chemical energy stored in it into ATP (adenosine - triphosphate). ATP is the energy - currency of the cell and is used to power various cellular processes like cell growth. Since ATP is formed from the chemical energy in glucose, this applies to chemical energy.

Answer:

• provided by food molecules: Chemical energy
• used to rearrange the atoms in carbon dioxide and water during photosynthesis: Light energy
• captured by chlorophyll: Light energy
• used after cellular respiration to directly power cell growth: Chemical energy