Which sigma factor of RNA polymerase comes into play during stress?

Disease causing organisms are identified by using

A. MAb's

B. Gene transfer

C. DNA probes

D. Microprojectiles

The bond between suger and nitrogenous base in case of DNA is known as

A. Glycosidic bond

B. Phosphodiester bond

C. Peptide bond

D. None fo these

Which among the following is not used as vector for gene cloning?

A. Cosmid

B. Phagemid

C. PAC

D. MAC

Methanogenic bacteria are

A. Anaerobic in nature

B. Aerobic in nature

C. Micro aerophillic in nature

D. Saprophitic in nature