Question

What is not true in the description of chloroplast?

	Chloroplasts generate all of the ATP needed to drive cellular processes in plant cells.
	Plants use activated carriers to synthesize sugars and other food molecules,
	Chloroplasts can capture light energy and use that to produce ATP and NADPH.
	Chloroplasts convert sunlight energy to metabolic fuels that are then used by plant mitochondria to generate large amounts of ATP.
	The high energy electrons donated to the photosynthetic electron-transport chain come from the absorption of sunlight energy by chlorophyll.

Which of the characteristic iS NOT shared in common between mitochondria & chloroplastss?

	Hydrogen gradients are created across membranes.
	Creation of a hydrogen gradient is dependent on glycolysis.
	Biosynthesis is driven by chemical gradients and the use of membrane pumps.
	Electron carriers/high energy molecules donate electrons to pump H+ across a membrane.
	Energy and biosynthesis pathways are similar to bacterial processes in non-eukaryotic cells.

Answer 1

1. First option

First option is incorrect because chloroplast generate ATP which is used in Calvin cycle for the synthesis of sugar. Rest all the cellular activities taking place inside a plant cell are dependent upon the ATP formed during cellular respiration in mitochondria.

Second option is correct because high energy electron carrier, NADPH and energy rich molecule ATP are used for the synthesis of Sugars.

Third option is correct because glucose synthesized in chloroplast is used by mitochondria for cellular respiration and to generate ATP.

Last option is correct because electron transport chain can take place only in the presence of Sunlight because whenever chlorophyll molecules absorb sunlight, the electrons are excited which can then enter electron transport chain.

2. Second option

First option is correct because during electron transport chain, Proton gradient is established across the membrane of chloroplast.

Second option is incorrect because glycolysis is exclusive to mitochondria and does not occur in chloroplast.

Third option is correct because electron transport chain occurs with the help of membrane proteins located inside the membrane.

Fourth option is correct because these electron Carriers are responsible for the pumping of Proton across the membrane.

Last option is correct because process of photosynthesis and cellular respiration is almost similar in prokaryotes and eukaryotes, only location is different.

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