Comment on the statement: 'Respiration is an energy-producing process,but $ATP$ is being used in some steps of the process.'

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(N/A) Respiration is a catabolic process that occurs in a stepwise manner.
Although the primary goal of respiration is to produce energy in the form of $ATP$,energy is initially required to activate certain substrates.
For example,in the initial steps of glycolysis,$ATP$ is consumed to phosphorylate glucose into glucose-$6$-phosphate and fructose-$6$-phosphate into fructose-$1,6$-bisphosphate.
This investment of $ATP$ is necessary to destabilize the glucose molecule,making it reactive for subsequent breakdown.
When one molecule of $ATP$ is hydrolyzed,it releases $ADP + \Pi$ along with approximately $7.3 \ kcal$ of energy.
Therefore,the process involves both an initial investment of energy and a subsequent net gain of energy,ensuring the overall respiratory balance sheet remains positive.

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Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$:
Assertion $A:$ $ATP$ is used at two steps in glycolysis.
Reason $R:$ First $ATP$ is used in converting glucose into glucose-$6$-phosphate and second $ATP$ is used in conversion of fructose-$6$-phosphate into fructose-$1,6$-bisphosphate.
In the light of the above statements,choose the correct answer from the options given below:

Which of the following is a product of phosphorylation in glycolysis?

What type of process is glycolysis?

Provide the full names for the following abbreviations:
$(1)$ $PEP$
$(2)$ $TPP$

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