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