SECTION A

Question 1

(a) Write short note on the significance of energy in microbial metabolism

(b) Transcription is a key stage in protein synthesis. Discuss.

(c) protein is central to life. Discuss

Question 2

(a) Mention classes of enzymes based on their biochemical activities

(b) Explain these terms: I. Irreversible inhabition, II.Feedback mechanism, III. Competitive inhibition.

SECTION B 

Question 1

Microorganisms have alternative pathways for the catabolism of carbon sources. Justify this statement with appropriate illustrations of two named pathways used by named groups of microorganisms.

Question 2

(ai) In an architect's description, which region(s) is/are present in the Atypical bacteria cell?

(aii) With an appropriate diagram ONLY describe this/these region (s).

(b) Discuss the significance of some features of the bacteria cell in (I) Virulence and (II) Classification.

SECTION C

Question 1

On a tabular form, give the nutritional categories of microorganisms under the following headings

(a) physiological type

(b) source(s) of energy, electrons and carbon.

Question 2

(a) Explain the continuous culture of microorganisms and their types .

(b) In a chemostat, the capacity of the vessel is 200ml, the innoculum was introduced in the medium at a flow rate of 60ml/hr, if half of the volume of the vessel capacity would be used, what is the dilution rate?.