MCQ
Streptomycin is produced by:
- AStreptomyces griseus
- BStreptomyces venezuelae
- CStreptomyces fradiae
- DAll of the above
Explanation:
Streptomycin which is produced by strains of Streptomyces griseus, exhibits antibiotic activity against various Gram-positive and Gram-negative bacteria but is ineffective against the fungal pathogens of man.
Waksman isolated the antibiotic in 1943 and found it to be active against Gram-negative bacteria.
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$I.$ Recombinant $DNA$ technology popularly known as genetic engineering is a stream of biotechnology which deals with the manipulation of genetic material by man in vitro
$II. pBR322$ is the first artificial cloning vector developed in $1977$ by Boliver and Rodriquez from $E$. coli plasmid
$III.$ Restriction enzymes belong to a class of enzymes called nucleases
Which of the statements given above are correct?