This set of Microbiology Multiple Choice Questions & Answers (MCQs) focuses on “Fungi – Molds and Yeasts – Morphology”.
1. Fungi are ______________
c) prokaryotic and lack chlorophyll
d) eukaryotic and lack chlorophyll
Explanation:Fungi are eucaryotic spore-bearing protists that lack chlorophyll. They are of great practical and scientific interest to microbiologists.
2. Hyphal wall consists of microfibrils composed of ___________________
a) hemicellulose or chitin
Explanation: The hyphal walls of fungi consist of microfibrils composed for the most part of hemicellulose or chitin; true cellulose occurs only in the walls of lower fungi.
3. Coenocytic hyphae have ________________
a) septate with uninucleate cells
b) septate with multinucleate cells
c) no septate
d) no septate with uninucleate cells
Explanation: Coenocytic hyphae are also known as nonseptate hyphae and hence have no sep-ta.
4. What are the dimensions of the filaments that the thallus of a fungus consists of?
a) 1 micrometre
b) 5 to 10 micrometre
c) 1 metre
d) 1 centimetre
Explanation: The thallus or body of a fungus consists of filaments, 5 to 10 micrometre across, which are commonly branched.
5. The yeast cell or mould filament is surrounded by a true cell wall.
Explanation: The yeast cell or mould filament is surrounded by a true cell wall. The exception being the slime moulds, which have a thallus consisting of a naked amoeboid mass of proto-plasm.
6. What do the term dimorphic mean?
c) Exists in two forms
d) Exists in single form
Explanation: Some fungi are dimorphic, that is, they exist in two forms. Some pathogenic fungi have a unicellular and yeastlike form in their host, but when growing saprophytically in soil or in laboratory medium they have a filamentous mold form.
7. Yeasts have flagella for the purpose of locomotion.
Explanation: Yeasts have no flagella or other organelles of locomotion.
8. The crosswalls constrict which of the following parts and then grow inwards to form septum?
Explanation: The crosswalls constrict the plasmalemma and grow inward to form generally an incomplete septum that has a central pore which allows for protoplasmic streaming.
9. Which of the following surrounds plasmalemma?
Explanation: Between the protoplasm and the wall is the plasmalemma, a double-layered mem-brane which surrounds the protoplasm.
Sanfoundry Global Education & Learning Series – Microbiology.
To practice all areas of Microbiology, here is complete set of 1000+ Multiple Choice Questions and Answers.