Bioenergetics - Theory & Question Answers Chapter # 11

 Biology XI Notes - Bioenergetics - Theory & Question Answers

Chapter # 11
Theory & Question Answers
Section IV - Functional Biology

➔ Bioenergetics

The energy is used as fuel for life which is derived from light energy trapped by plant cells and converted into energy-rich compounds. Animals obtain their energy by eating plants or by eating the organisms that eat plants.

“Capturing and conversions of light energy from one form to another in living system and its utilization in metabolic activities is called bioenergetics”.

Role of ATP As Energy Currency:

• Organic molecules especially carbohydrates are degraded to release energy, CO₂ and H₂O. Some of this energy is used to produce ATP. It shows that ATP is the common energy currency of cells, when cell require energy, they spent ATP for that under cellular condition is produce 7.3 K.Cal/mol on conversion into ADP.

  $A - P - P - P \rightarrow A - P - P + P + 7.3 \, \text{K.cal/mol}$

• ATP acts as a mediator, capable of receiving energy from one reaction and transfers this energy to derive another reaction.

BIOENERGETICS

 BIOENERGETICS

Q.1: What is Photosynthesis?

Ans: Photosynthesis is a process in which plants manufacture their food in the presence of chlorophyll and sunlight by the combination of carbon dioxide and water to form simple carbohydrates. In this process, oxygen is liberated. It is important to note that the amount of carbon dioxide consumed in this process is equal to the amount of oxygen liberated.

In photosynthesis, not only simple carbohydrates are formed but also a considerable amount of energy, which is initially obtained from sunlight as radiant energy, is transferred by green cells into chemical energy.