With reference to C3 and C4 pathways of photosynthesis consider the following statements 1 C3 plants...........

Science Affairs Botany

Download Solution PDF

With reference to C3 and C4 pathways of photosynthesis, consider the following statements:

1. C3 plants are less efficient in photosynthesis as compared to C4.

2. Most of the plants on Earth are C3 plants.

3. Maize and sugarcane are C4 plants.

Select the correct code given below.

1 Only

1 and 3 Only

2 and 3 Only

All of the above

छोटे Courses बड़े Results

Master Botany

Prepare through Micro-courses

Try Now

Explanation:

C3 plants are called temperate or cool- season plants. They reduce (fix) CO2 directly by the enzyme ribulose bisphosphate carboxylase (RUBPcase) in the chloroplast.The reaction between CO2 and ribulose bisphophate forms two molecules of a 3-carbon acid. This 3-carbon acid is called-hosphoglyceric acid and explains why the plants using this reaction are called C3
plants.
C4 plants are often called tropical or warm season plants. They reduce carbon dioxide captured during photosynthesis to useable components by first converting carbon dioxide to oxaloatcetate, a 4-carbon acid.This is the reason these plants are referred to as C4 plants. Photosynthesis then continues in much the same way as C3 plants. This type of photosynthesis in highly efficient and little fixed CO2 is lost through photorespiration.