C₄ plants have a characteristic leaf anatomy called kranz anatomy with two distinct choloroplast containing cells, mesophyll and bundle sheath cells.

Correct Option: A

C₄ plants have a characteristic leaf anatomy called kranz anatomy with two distinct choloroplast containing cells, mesophyll and bundle sheath cells.

Light dependent uptake of O₂ and release of CO₂ in C₃ photosynthetic cell is called photorespiration. Glycolate (glycolic acid) is the chief metabolite of photorespiration and also its substrate. Other important metabolities are the amino acids glycine and serine. But phosphoglyceric acid (PGA) is a lipid and is not substrate of photorespiration.

Correct Option: B

Light dependent uptake of O₂ and release of CO₂ in C₃ photosynthetic cell is called photorespiration. Glycolate (glycolic acid) is the chief metabolite of photorespiration and also its substrate. Other important metabolities are the amino acids glycine and serine. But phosphoglyceric acid (PGA) is a lipid and is not substrate of photorespiration.

C₄ plants are specialised plants for better CO₂ assimilation found in hot environment.They have a characteristic leaf anatomy called kranz anatomy showing two distinct choloroplast containing cells mesophyll and bundle sheath cells. Mesophyll cells are located very near to bundle sheath cells and are the site for C₄ cycle i.e. CO₂ is first fixed as a 4 carbon compound oxalocetic acid by the action of PEP carboxylase. The second carboxylation event occurs in stroma of chloroplast of bundle sheath cell through C₃ cycle.

Correct Option: A

C₄ plants are specialised plants for better CO₂ assimilation found in hot environment.They have a characteristic leaf anatomy called kranz anatomy showing two distinct choloroplast containing cells mesophyll and bundle sheath cells. Mesophyll cells are located very near to bundle sheath cells and are the site for C₄ cycle i.e. CO₂ is first fixed as a 4 carbon compound oxalocetic acid by the action of PEP carboxylase. The second carboxylation event occurs in stroma of chloroplast of bundle sheath cell through C₃ cycle.

Photosynthesis is completed in two phases-light and dark phases. In dark phase (Blackman’s reaction or biosynthetic phase) carbohydrates are synthesised from carbon dioxide in stroma of chloroplast using ATP and NADPH products of light reactions.

Correct Option: D

Photosynthesis is completed in two phases-light and dark phases. In dark phase (Blackman’s reaction or biosynthetic phase) carbohydrates are synthesised from carbon dioxide in stroma of chloroplast using ATP and NADPH products of light reactions.

In leaves of C₄ plants, malic acid synthesis during CO₂ fixation occurs in mesophyll cells. The mesophyll cells perform C₄ cycle and the cells of bundle sheath perform C₃ cycle. CO₂ taken from the atmosphere is accepted by phosphoenol pyruvic acid (PEP) present in the chloroplasts of mesophyll cells of these leaves, leading to the formation of a 4-C compound, oxaloacetic acid (OAA). This acid is converted to another 4-C acid, the malic acid which enters into the chloroplast of bundle sheath cells and undergoes oxidative decarboxylation yielding pyruvic acid (3C - compound) and CO₂.

Correct Option: B

In leaves of C₄ plants, malic acid synthesis during CO₂ fixation occurs in mesophyll cells. The mesophyll cells perform C₄ cycle and the cells of bundle sheath perform C₃ cycle. CO₂ taken from the atmosphere is accepted by phosphoenol pyruvic acid (PEP) present in the chloroplasts of mesophyll cells of these leaves, leading to the formation of a 4-C compound, oxaloacetic acid (OAA). This acid is converted to another 4-C acid, the malic acid which enters into the chloroplast of bundle sheath cells and undergoes oxidative decarboxylation yielding pyruvic acid (3C - compound) and CO₂.