Question

$N{H}_3$ releases during which of the following process?

• A. Photorespiration
• B. Dark respiration
• C. CAM
• D. All of the above

Answer 1

The correct option is A Photorespiration

Photorespiration is a wasteful process, which occurs in $C_3$ plants in presence of light. In the photorespiratory pathway, there is neither synthesis of sugars, nor of ATP. Rather it results in the release of $C{O}_2$ with the utilisation of ATP.

In the photorespiratory pathway there is no synthesis of ATP or NADPH. Therefore, photorespiration is a wasteful process. This process occurs in chloroplast, peroxisomes and mitochondria. In mitochondria two molecules of glycine combine together to form a molecule of serine, with the simultaneous release of carbon dioxide and ammonia.