The abundantly distributed enzyme in germinating seeds and adipocytes is

The correct option/answer is Lipase.

Let us understand why lipase is the most abundantly distributed enzyme in both germinating seeds and adipocytes through a step-by-step biological breakdown:

1. What are Germinating Seeds and Adipocytes?
- Germinating Seeds: Many plants store energy in the form of lipids (oils and fats) within their seeds (for example, castor, sunflower, and peanut seeds). During germination, the embryo requires a rapid supply of energy and carbon skeletons to grow before it can perform photosynthesis.
- Adipocytes: These are specialized animal cells (fat cells) whose primary function is to store energy in the form of triglycerides (fat).

2. The Role of Lipids:
In both germinating oilseeds and adipocytes, the stored energy is in the form of triacylglycerols (triglycerides). To utilize this stored energy, these lipid molecules must first be broken down into their constituent parts: glycerol and fatty acids.

3. Function of Lipase:
The enzyme responsible for catalyzing the hydrolysis of ester bonds in triglycerides is lipase. The general reaction can be represented as:

Triacylglycerol + 3H₂O ⇒ Glycerol + 3 Fatty Acids

- In germinating seeds, lipase breaks down stored fats into fatty acids, which are then converted into carbohydrates (via the glyoxylate cycle and gluconeogenesis) to fuel seedling growth.
- In adipocytes, lipase (such as hormone-sensitive lipase) hydrolyzes stored fat to release fatty acids into the bloodstream for energy production in other tissues during fasting or exercise.

4. Why other options are incorrect:
- Proteases: These enzymes degrade proteins into amino acids. While active during germination, they are not the primary enzyme associated with fat-storing adipocytes or the lipid-mobilization phase of oilseeds.
- Cellulase: This enzyme breaks down cellulose (cell wall component). Animals (including adipocytes) do not produce cellulase, and it is not involved in lipid mobilization.
- Nuclease: These enzymes break down nucleic acids (DNA/RNA) and are not involved in major energy storage mobilization.

Therefore, Lipase is the enzyme abundantly distributed in both germinating seeds and adipocytes to facilitate the mobilization of stored lipids.