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Sbl 105 Introductory Microbiology Question Paper
Sbl 105 Introductory Microbiology
Course:Bachelor Of Science Microbiology
Institution: University Of Nairobi question papers
Exam Year:2005
UNIVERSITY OF NAIROBI
FIRST SEMESTER EXAMINATIONS 2004/2005
SECOND YEAR EXAMINATIONS FOR THE DEGREE OF BACHELOR OF EDUCATION (SCIENCE)
SBL 105: INTRODUCTORY TO MICROBIOLOGY
INSTRUCTIONS
ANSWER ALL QUESTIONS FROM SECTION A & B AND ONE QUESTION FROM SECTION C
SECTION A 15 questions (1 mark each)
Place a tick opposite the correct answer.
1. The major groups of microorganisms are:
a). Bacteria, fungi, algae, protozoa, viruses
b). Bacteria, fungi, algae,viruses
c). Bacteria, fungi, algae, protozoa
d). Bacteria, fungi, protozoa, viruses
2. Which of the following statements correctly describes members of the kingdom fungi:
a). They are unicellular eukaryotic animals
b). They are very small agents which are parasitic on animals, plants and other
microogarnisms
c). They are unicellular prokaryotes and multiply by binary fission
d). Have no chlorophyl and obtain their nutrients through absorption
3. Penicillin reproduces asexually by forming:
a). Abscospores
b). Basidiospores
c). Zygospores
d). Conidia
4. An example of an organism that causes diarrhoea mainly in children
a). Giardia lamblia
b). Trichomonus hominis
c). Trichomonus rhodensiense
d). Leishmania donovani
5. In accordance with binomial nomenclature the first name of the organism is:
a). Species
b). Taxon
c). Family
d). Genus
6. Common bacterial cells measure:
a). 5-10 micrometers wide 2-5 micrometers long
b). 0.5-10 micrometers wide 2-5 micrometers long
c). 0.5-1.0 micrometers wide 2-5 micrometers long
d). 0.5-10 micrometers wide 0.2-5 micrometers long
7. An example of a bacteria that has short rods with rounded ends is:
a). Sarcina
b). Streptococcus faecalis
c). Bacillus meguterium
d). Eschrerichia coli
8. Fungal hyphae have rigid walls made up of:
a). Chitin
b). Cellulose
c). Starch
d). Murein
9. In bacteira cultures grown on solid media bacteriophages make lytic holes known as:
a). Lawns
b). Plaques
c). Colonies
d). Virions
10. Chlamydomonas is an example of an algae in the dicvision:
a). Chlorophycophyta
b). Cyanophycophyta
c). Euglenophycophyta
d). Chrysophycophyta
11. Lichens reproduce by means of "reproductive bodies" called:
a). Akinetes
b). Soredia
c). Spores
d). Heterocysts
12. Leishmania donovani is an example of a:
a). Bacterium
b). Algae
c). Protozoa
d). Fungus
13. A virus particle contains nucleic acid and protein coat which form the:
a). Capsid
b). Nucleocapsid
c). Virion
d). Envelope
14. Potato blight plant disease is caused by:
a). Penicillum sp
b). Aspergillus sp
c). Peronospora sp
d). Phytophthora infestans
15. Lichens and mycorrhizae are examples of which types of association?
a). Commensalins
b). Parasitism
c). Saprophytism
d0. Symbiosis
SECTION B SHORT ANSWER QUESTIONS EACH QUESTION IS 5 MARKS
1. Draw and label a generalized bacterial cell.
2. Explain how pasteurization process started.
3. Distinguish differential media from selective media.
4. Explain how viruses affect their plalnt hosts.
5. Give an account of the diatoms i.e Bacillariophycophyta.
6. Describe asexual reproduction process in Rhizopus stolonifer.
SECTION C ESSAY QWUESTIONS (25 marks each)
1. Discuss the major characteristics used in classification of microorganisms.
2. Physical factors necessary for bacterial growth.
3. Outline characteristics of algae.
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