Question

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Leuconostocs spp. produce diacetyl from citrate metabolism, but Lactococcus lactis spp. lactis do not do the same
Reason (R): The plasmid coding for citrate utilization genes are present in Leuconostocs, but not in Lactococcus lactis spp. lactis
In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A)
• B. Both (A) and (R) are true but (R) is NOT the correct explanation of (A)
• C. (A) is true but (R) is false
• D. (A) is false but (R) is true

Hint:

Remember the genomic location of citrate utilization genes:
- Leuconostoc spp. \(\rightarrow\) Chromosomal-encoded (highly stable).
- Lactococcus lactis biovar. diacetylactis \(\rightarrow\) Plasmid-encoded (unstable, can be lost easily).

Answer 1

The Correct Option is C