Photosynthesis and Factors Affecting its Rate in Plants

The video explains photosynthesis, an endothermic reaction where plants convert light energy into glucose and oxygen. It discusses factors affecting the rate of photosynthesis, such as light intensity, carbon dioxide concentration, and temperature. The role of chlorophyll in absorbing light is highlighted, and the video details how plants use glucose for energy, storage, and growth, including conversion into starch, fats, oils, cellulose, and proteins.

What is the primary role of light in the process of photosynthesis?

• To provide heat to the plant

• To convert glucose into starch

• To absorb carbon dioxide from the atmosphere

• To transfer energy to chloroplasts for chemical reactions

How does increasing light intensity affect the rate of photosynthesis initially?

• It increases the rate

• It has no effect on the rate

• It stops the process completely

• It decreases the rate

What happens to the rate of photosynthesis when the temperature exceeds the optimal level?

• The rate remains constant

• The rate increases indefinitely

• The rate increases slightly

• The rate decreases due to enzyme damage

In which part of the plant cell is light energy absorbed for photosynthesis?

• Nucleus

• Chloroplasts

• Cell wall

• Mitochondria

What is one of the ways glucose is used by plants after photosynthesis?

• It is released into the atmosphere

• It is used to make proteins

• It is converted into oxygen

• It is used to absorb more light