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