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15. An investigation was carried out and the results
are shown below. Substance X resulted from a
metabolic process that produces ATP in yeast (a
single-celled fungus)
Glass
apparatus
Several
hours later
Seal
Sugar
yeast
and water
Which statement best describes substance X?
O
RL is oxygen released by protein synthesis.
(2) It is glucose that was produced in
photosynthesis
(3) It is starch that was produced during digestion
(4) lis carbon dioxide released by respiration

15 An investigation was carried out and the results are shown below Substance X resulted from a metabolic process that produces ATP in yeast a singlecelled fung class=

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Answer:

The correct option is D. It is carbon dioxide released by respiration.

Explanation:

The process by which ATP is abundantly formed in organisms is termed as cellular respiration. Cellular respiration can be described as a process in which carbon dioxide and water are produced from glucose and oxygen. ATP molecules are synthesized by this process which are used for cellular activities.

Hence, the substance X in the investigation shows carbon dioxide which was produced when the yeast cells began to respire. Yeast cells can respire either in the presence of oxygen or without oxygen.