MCQ
Chloramphenicol and erythromycin are produced by:
- AStreptomyces and Bacillus
- BStreptomyces
- CStreptomyces and Penicillium
- DNone of the above
Explanation:
Chloramphenicol is an antibiotic useful for the treatment of a number of bacterial infections. It is bacteriostatic.
Streptomyces is a genus of Gram-positive bacteria that helps in the production of chloramphenicol and erythromycin.
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$A.$ Detrivores perform fragmentation.
$B.$ The humus is further degraded by some microbes during mineralization.
$C$. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching.
$D$. The detritus food chain begins with living organisms.
$E$. Earthworms break down detritus into smaller particles by a process called catabolism.
Choose the correct answer from the options given below:
$I.$ Tightly linked genes on the same chromosome show higher recombinations.
$II.$ Genes far apart on the same chromosome show very few recombinations.
$III.$ Genes loosely linked on the same chromosome show similar recombinations.