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8.Microbes in Human Welfare
normal
Assertion : Lichen is important for chemical industries.
Reason : Litmus and Orcein are formed from lichens.
A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.
(AIIMS-2009)
Solution
Litmus is an important and widely used dye in chemical laboratories as an acid-base indicator. It is obtained from Rocella montaignei. Orcein, a biological stain, is obtained from Rocella tinctoria.
Standard 12
Biology
