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