Assertion : In the formation of one glucose, 686,000 calories energy are produced.
Reason : The energy is provided by a total of 12 NADPH and 18 ATP.

Options

A. If both the asserition and the reasion are true and the reason is a correct explanation of the assertion
B. If both the assertion and reasoni s not a correct ecplanation of the assertio
C. If the assertion is true but the reason is false
D. If both the asseertion and reason are false

Answer

A

Explanation

The energy balance of photosynthesis is:
`6CO_(2) + 12H_(2)O overset("light")(to) C_(6)H_(12)O_(6) + 6CO_(2) + 6H_(2)O`
which represents a storage of 686,000 calories per mole. This energy is provided by a total of 12 NADPH and 18 ATP molecules, which represent 750,000 calories. The efficiency reached by the PCR cycle is thus as high as `90% (686//750xx100 = 90%)`.