Mycology MCQs (Quiz 18) Posted on July 9, 2026Author agropublishers 0 1. The primary characteristic of the lag phase of microorganisms is _________________________ Maximum cell death Rapid cell division Active metabolic activity with little or no cell division Spore formation 2. A basidium typically produces _______ basidiospores One Three Two Four 3. _________ is characteristic of Tobacco mosaic virus (TMV) Cubical symmetry Bilateral symmetry Icosahedral symmetry Helical symmetry 4. The first phase of a typical microbial growth curve is the _________________ Lag phase Log phase Stationary phase Death phase 5. During the lag phase, microorganisms mainly ______________________ Undergo exponential multiplication Form endospores Produce secondary metabolites Adapt to the new environment and synthesize enzymes 6. An ascus typically contains _______ ascospores Two Sixteen Four Eight 7. Crown gall disease in plants is caused by bacterium __________________ _________________ Pseudomonas syringae Agrobacterium tumefaciens Erwinia amylovora Xanthomonas campestris 8. Unlike animal viruses, the vast majority of plant viruses ______________ Lack lipid envelope Have double protein coats Replicate in mitochondria Possess a lipid envelope 9. Plant viruses exhibit which of the following types of morphology? Spherical only Variable in morphology Rod-shaped only Flexuous filamentous 10. Basidiospores differ from ascospores because they are produced __________________________ Neither externally nor internally Both externally on basidia and internally within asci Externally on basidia Internally within asci Loading … Question 1 of 10
