It is known that red muscle fibres in animals can work for longer periods of time continuously. How is this possible?

The energy yield in terms of ATP is higher in aerobic respiration than during anaerobic respiration. Why is there anaerobic respiration even in organisms that live in aerobic condition like human beings and angiosperms?

RuBP carboxylase, PEPase, pyruvate dehydrogenase, ATPase, cytochrome oxidase, hexokinase, lactate dehydrogenase. Select/ choose enzymes from the list above which are involved in
(i) photosynthesis
(ii) respiration.

A process is occurring throughout the day in 'X' organism. Cells are participating in this process. During this process, ATP, CO₂ and water are formed. It is not a light dependent process.
(i) Name the process.
(ii) It is a catabolic or an anabolic process.
(iii) What could be the raw material of this process?

Respiration is an energy releasing and enzymatically controlled catabolic process, which involves a stepwise oxidative breakdown of organic substances inside living cells. In this statement about respiration explain the meaning of
(i) stepwise oxidative breakdown
(ii) organic substances (used as substrates).