The Living World Question 8
8. What is true for photolithotrops?
[2001]
(a) Obtain energy from radiations and hydrogen from organic compounds
(b) Obtain energy from radiations and hydrogen from inorganic compounds
(c) Obtain energy from organic compounds
(d) Obtain energy from inorganic compounds
Show Answer
Answer : b
Hints & Solutions
(b) Photolithotrophs manufacture their own organic nutrients from inorganic raw materials $(H_2, O_2)$ with the help of radiation energy. Some examples of photolithotrophic bacteria are purple bacteria (e. g., Chromatiaceae), green bacteria (Chlorobiaceae and Chloroflexi) and Cyanobacteria. Purple and green bacteria oxidize sulfide, sulfur, sulfite, iron or hydrogen.
