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Bota 233: Mycology Question Paper

Bota 233: Mycology

Course:Bachelor Of Education Science

Institution: Chuka University question papers

Exam Year:2013

CHUKA

UNIVERSITY

UNIVERSITY EXAMINATIONS
SECOND YEAR EXAMINATION FOR THE AWARD OF DEGREE OF
BACHELOR OF EDUCATION (SCIENCE)

BOTA 233: MYCOLOGY

STREAMS: BED (SCI), BSC Y2S1 TIME: 2 HOURS

DAY/DATE: TUESDAY 6/8/2013 2.30 PM - 4.30 PM
INSTRUCTIONS:

Section A – 30 Marks (Answer All the Questions)

1. (a) State four ways by which fungi obtain their energy for growth. [2 marks]

(b) Explain the spherale mechanism of fungal spore release. [3 marks]

2. Using illustrations differentiate between gametantial contact and gametangial copulation as mechanisms of genetic variability in fungi. [4 marks]

3. Explain how myxomycetes differ from true fungi. [3 marks]

4. Describe the phases involved in industrial fermentation of beer. [6 marks]

5. (a) Explain fungi as

(i) Antibiotic producers [2 marks]

(ii) Biocontrol agents [2 marks]

(b) Give four applications of recombinant DNA technology. [2 marks]

6. Describe the following fungal diseases in humans

(i) Tinea pedis [3 marks]

(ii) Aspergillosis [3 marks]

Section B – 40 Marks (Answer any Two Questions)

7. Write an essay on mycotoxins as fungal secondary metabolites. [20 marks]

8. Discuss the methods used in storage and maintenance of fungal cultures. [20 marks]

9. Describe the lifecycle of the following fungal species

(i) Dictyostelium disciodeum [10 marks]

(ii) Taphrinia deformans

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Bota 233: Mycology Question Paper

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