Question

Glycolysis takes place in
A. All cells
B. Only eukaryotic cells
C. Muscle cells
D. Nerve cells

Answer 1

Hint: It took 100 years to discover this process. It forms the basic process in our metabolism. The energy required in our body is generated via a long cascade. It was introduced by Harden and William Young.

Complete answer:
Glycolysis is the process of conversion of glucose to the simpler forms that is two molecules of pyruvate or pyruvic acid. It is an anaerobic pathway which is of ten steps. It utilizes energy in the first half and produces ATP in the second half. It is an enzyme catalysed process. Any form of monosaccharide can be converted and reduced.

It has two phases-
- The preparatory phase
- The pay off phase.

- The preparatory phase is an investment phase which consumes energy to convert glucose into three-carbon compounds. There are various enzymes like hexokinase, isomerases etc.
- The pay off phase is the net gain of ATP and NADH. This occurs twice to treat the two three-molecule sugar compound. It gives us 4 ATP and 2 NADH at the end producing the pyruvic acid.

> Option A: All cells: All the cells need the energy to perform their work. So they need to do the glycolysis to obtain energy.

> Option B: Only Eukaryotic cells: in the eukaryotic cells, the energy is obtained from the glycolysis process.

> Option C: Muscle cells: Muscle cells need the energy to move the joints and muscles so need ATP to do work.

> Option D: Nerve cells: Nerve cells will transmit the electrical signals. This requires energy so has to undergo glycolysis.

Hence, the correct answer is option (A).

Note: It is the fastest process of producing ATP or energy. It initiates in the cytoplasm of the cell but is completed in the mitochondria. It occurs in both the prokaryotes and eukaryotes. It can occur both aerobically and anaerobically.