IMMUNOLOGY

IMMUNOGLOBULINS

CLASSICAL ALTERNATE AND LECTIN PATHWAYS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is the reason why C4 plants create malate as an intermediate molecule.
A
to avoid Photorespiration by oxygen
B
to keep oxygen deposits high
C
to make water vapor exit the through the stomata
D
None of the above
Explanation: 

Detailed explanation-1: -The malate and Asp, resulting from the rapid conversion of OAA, are the organic acids delivered to the sites of carbon reduction in the bundle-sheath cells of the leaf, where they are decarboxylated, with the released CO2 used to make carbohydrates.

Detailed explanation-2: -In CAM plants, they open their stomata at night and incorporate CO2 into organic acids, thus preventing photorespiration. C4 plants also avoid photorespiration by using the Hatch-Slack pathway prior to the Calvin cycle. The enzyme PEP carboxylase is used in place of RuBisCO to fix CO2.

Detailed explanation-3: -CAM plants keep their stoma close during the day to prevent water loss. Instead, the stoma are opened at night to take in carbon dioxide from the atmosphere. The carbon dioxide is converted to a molecule called malate which is stored until the daylight returns and photosynthesis begins via the Calvin Cycle.

There is 1 question to complete.