Which one of the following is complex V of the ETS of inner mitochondrial membrane?

The number of carbon atom in citric acid is

The electron carrier molecules Q and cytochrome c

are reduced as they pass electrons onto the next molecule.
contain heme prosthetic groups.
shuttle protons to ATP synthase.
are mobile carriers that transfer electrons between the electron carrier complexes.

Decarboxylation is not involved in

If COis given off in respiration, why does the amount of CO in the atmosphere remains relatively constant ?

Which of the following substances is not an essential component of the tricarboxylic acid cycle?

Solution

NADP is a coenzyme of dehydrogenases participating in photosynthesis and pentose phosphate pathway.In TCA cycle the coenzyme is either NAD or FAD.

The oxidation of a molecule of FADH₂ yields less ATP than a molecue of NADH yields because FADH₂

carries fewer electrons.
is formed in the cytosol and energy is lost when it shuttle sits electrons across the mitochondrial membrane.
passes its electrons to a transport molecule later in the chain and at a lower energy level.
is the last molecule produced by the Krebs cycle, and little energy is left to be captured.

What isthe final pathway followed by all carbon atoms derived from carbohydrates, lipids and proteins when they are oxidised during respiration?

Solution

The Krebs cycle is a complex of nine reactions where two molecules of acetyl CoA are oxidised to CO₂.

“Mitchell’s chemiosmotic theory” belongs to

Which of the following types of mammalian cell does not carry out oxidative phosphorylation?

Solution

Oxidative phosphorylation is the addition of a phosphate group to ADP using the energy gained from electron transfer along a chain of electron carriers. This process generates energy in the form of ATP, and is absent in erythrocytes.

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