Fructose 2,6-bisphosphate binds to its allosteric site on PFK-1, it increases the enzyme’s affinity for its substrate fructose 6-phosphate and reduces its affinity for the allosteric inhibitors ATP and citrate

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#XL - Q Biochemistry

A human cell has about 1000–2000 mtDNA molecules

A human egg has about 500,000 mtDNA molecules

A sperm has only about 100 mtDNA molecules

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#XL - Q Biochemistry

mtDNA is located in the mitochondrial matrix, and in the rapidly growing cells, mtDNA is often seen in regions devoid of densely stacked cristae.

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#XL - Q Biochemistry

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#XL - Q Biochemistry

Functions of Mitochondria-

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#XL - Q Biochemistry

In mitochondria, the metabolism of sugars is complete: allows 15 times more ATP to be made from a sugar than by glycolysis alone.

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#XL - Q Biochemistry

In other cells, mitochondria remain fixed at points of high energy demand.