Question

Out of $36$ ATP molecules produced per glucose molecule during respiration.

• A. $2$ are produced outside glycolysis and $34$ during respiratory chain
• B. $2$ are produced outside mitochondria and $34$ inside mitochondria
• C. $2$ during glycolysis and $34$ during Krebs cycle
• D. All are formed inside mitochondria

Answer 1

The correct option is B $2$ are produced outside mitochondria and $34$ inside mitochondria

Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products. The reactions involved in respiration are catabolic reactions, which break large molecules into smaller ones, releasing energy in the process, as weak so-called "high-energy" bonds are replaced by stronger bonds in the products. Respiration is one of the key ways a cell releases chemical energy to fuel cellular activity. The chemical energy stored in ATP (its third phosphate group is weakly bonded to the rest of the molecule and is cheaply broken allowing stronger bonds to form, thereby transferring energy for use by the cell) can then be used to drive processes requiring energy. Since the cellular respiration happens inside mitochondria, and glucose being given out as a by-product, glucose is produced inside and outside mitochondria.

So the correct option is '2 are produced outside mitochondria and 34 inside mitochondria'.