The two waste products of oxidation in cells are

In how many steps is $CO_2$ released during the aerobic respiration of pyruvic acid?

Select the correct match for $X$ and $Y$:

Column $X$	Column $Y$
$(1)$ Mitochondrial matrix	$(P)$ Photophosphorylation
$(2)$ Chloroplast stroma	$(Q)$ Oxidative phosphorylation
$(3)$ Cristae	$(R)$ Krebs cycle
$(4)$ Granum	$(S)$ Dark reaction

When a man enters a seed godown,the feeling is that of

Which of the following substances can undergo oxidation and release energy?

Assertion : The inner membrane of mitochondria contains systems involving electron transport.
Reason : The mitochondrial matrix contains enzymes of Kreb's cycle.