Biology Mcqs

Coccobacillus has a shape similar to________________?

A. Diplobacillus
B. Sarcina
C. Egg
D. None of these

Some bacteria ranging occasionally a size of 500 ?m in length are___________________?

A. Escherichia coli
B. Spirochetes
C. Mycoplasma
D. Epulopiscuim

Germ theory of disease has________________postulates?

A. 3
B. 5
C. 4
D. 6

In bacterial categories the bacteria smaller in number are_______________?

A. Gram-ive bacteria
B. Eubacteria
C. Ancient bacteria
D. Gram +ive bacteria

E. coli and example of entrobacteriace is important for causing diarrheal diseases its size is____________?

A. 0.1-600 um
B. 100-200 nm
C. 1.1-1.5 um (width) 2.0-6.0 um (length)
D. 0.75-1.25 um

The size of Spirochete is_____________?

A. 0.1 -600 um
B. 100-200 nm
C. 500 um
D. 0.75-1.25 um

Which of the following structure is not present in all the bacteria_____________?

A. Cell membrane
B. Chromatin bodies
C. Ribosomes
D. Capsule

Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch_____________?

A. A specific organism can always be found in association with a given disease
B. The organism can be isolated and grown in pure culture in the laboratories
C. The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so.
D. It is possible to recover the organism in pure culture from the experimentally infected animals

Who discovered the bacteria causing tuberculosis and also developed various techniques of media preparation and maintenance of pure culture_____________?

A. Robert Koch
B. Louis Pasteur
C. Alexander Fleming
D. Leeuwenhoek

Who coined the term Animalcules for microorganisms like Bacteria and protozoa______________?

A. Robert Koch
B. Louis Pasteur
C. Alexander Fleming
D. Leeuwenhoek