Correct option is B
Explanation:
(1): Correct. The glyoxylate cycle is absent in humans. Humans do not have the enzymes necessary to carry out the full glyoxylate cycle. It is found primarily in plants, fungi, and some bacteria, but not in humans.
(2): Incorrect. The glyoxylate cycle does not occur in specialized microsomes called glyoxysomes in humans or animals. While it does take place in glyoxysomes in plants and some fungi, in animals and humans, the cycle is either completely absent or very limited. The cycle is not a part of human cellular processes, as humans cannot carry out the full cycle due to missing enzymes.
(3): Correct. The glyoxylate cycle allows for the conversion of fatty acids into sugars. This is critical during seed germination in plants, where stored fats are converted into glucose for energy and growth.
(4): Correct. The glyoxylate cycle involves enzymes from both the glyoxysome and the mitochondrion in plants and certain other organisms. The cycle requires cooperation between these organelles for efficient metabolic conversion.
Information Booster:
The glyoxylate cycle is present in plants and certain bacteria, allowing them to convert fatty acids into glucose.
Glyoxysomes are specialized organelles involved in fatty acid metabolism and contain enzymes necessary for the glyoxylate cycle.
In humans, the glyoxylate cycle is absent. Humans rely on the citric acid cycle for metabolism, not the glyoxylate cycle.
Mammals cannot synthesize sugars from fatty acids due to the lack of the glyoxylate cycle, and thus must obtain sugars from dietary sources.
Conclusion:
The incorrect statement about the glyoxylate cycle is (2): The glyoxylate cycle does not occur in glyoxysomes in humans, as it is absent in humans entirely.
