Question

5) If bacteria were inoculated into a media containing only carbon dioxide, and the bacteria showed good growth after 24 hrs, is the bacteria a, aerobic b. facultative anaerobic c. anaerobic d. all the above

Answer 1

5. Answer :- "C" i.e anaerobic.

Explanation :- we know that aerobic bacteria are those which required oxygen for growth and can live in presence of oxygen only i.e Cornybacterum sp. But here the media contain only Co2 so it is not the answer.

Facultative anaerobic bacteria are those which can survive in absence of oxygen but required oxygen for growth i.e E.coli. But here media contain only Co2 so it is also not the answer.

Ultimately we have anaerobic bacteria that is the bacteria which grow in absence of oxygen even died in presence of oxygen and in the presence of Co2 their growth rate is maximum i.e Clostridium sp. So here media contain only Co2 that mean the answer is anaerobic bacteria i.e option C.