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CBSE Class 11-science Answered

1.What is TCA cycle?

2.Why is granum absent in leucoplast? 

Asked by pb_ckt | 29 Apr, 2019, 12:45: PM
Expert Answer

1. The citric acid cycle also known as the TCA cycle is a series of chemical reactions used by all aerobic organisms to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins, into adenosine triphosphate (ATP) and carbon dioxide.

2. Granum act to increase the surface area of the thylakoids, which results in more light being absorbed into the chlorophyll. Leucoplasts are a group of plastids which include many differentiated colorless organelles with very different functions. They act as a store for starch in non-green tissues such as roots, tubers, or seeds. Since the function of leucoplasts is not in the process of photosynthesis, the granum are not to be found in leucoplasts. However, they are present in abundance in chloroplasts.

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