Assertion : Dark reaction occurs only at nigh | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Dark reaction is also known as light-independent phase. Unlike light reaction,it does not require light as an essential factor. Thus,it can take p

Vedclass · Accepted Answer

If both the Assertion and Reason are incorrect.

Vedclass · Answer

(D) Dark reaction is also known as light-independent phase. Unlike light reaction,it does not require light as an essential factor. Thus,it can take place both in the presence or absence of light.The term 'dark reaction' does not mean that it takes place only in the dark period or at night.$CO_2$ fixation occurs in both $C_3$ and $C_4$ cycles.In the $C_3$ cycle,$CO_2$ is fixed by the enzyme RuBisCO to a $5$-carbon compound $RuBP$,which is converted into $2$ molecules of $3$-carbon $PGA$.In the $C_4$ cycle,the first product of $CO_2$ fixation (which takes place in the mesophyll) is a $4$-carbon compound called oxaloacetic acid $(OAA)$.Since both the Assertion and the Reason are scientifically incorrect,the correct option is $D$.

Assertion : Dark reaction occurs only at night in the stroma of chloroplast.
Reason : $CO_2$ fixation occurs only during $C_3$ cycle.

Similar Questions

Aerobic atmosphere is maintained by

Which of the following categories of photosynthetic plants has the lowest transpiration ratio $(TR)$?

For photosynthesis (i.e.,for synthesis of organic matter),the green plants need:

Anoxygenic photosynthesis is characteristic of

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion : Dark reaction occurs only at night in the stroma of chloroplast.Reason : $CO_2$ fixation occurs only during $C_3$ cycle.