Microtubules are absent in which of the following?

Assertion: Mitochondria helps in photosynthesis.
Reason: Mitochondria have enzymes for dark reaction.

The proteins forming the membranes of mitochondria are called:

Cellular respiration is carried out by

The matrix of the mitochondrion contains .......

If living cells similar to those found on Earth were found on another planet where there was no oxygen,which cell organelle would most probably be absent?