Microbiology Exam Questions with 100% Correct Answers | Verified | Updated

Microbiology Exam Questions with 100% Correct Answers | Verified | Updated identify which of the following are external structures used primarily for direct contact interactions with other cells a ) Flagella b) Fimbriae c) Cilia d) Pili - answerPILI, Fimbriae Which of the following describes movement towards or away from light ? 1) Phototaxis 2)Chemotaxis - answerPhototaxis Which of the following bored through the stomach lining and causes gastric ulcers? a) Klebsiella pneumoniae B) Streptococcus pneumoniae c) Proteus vulgaris d) Helicobacter pylori - answerHelicobacter pylori The main function of the external appendages known as ----------- is to stick to other cells and surfaces, which may lead to aggregates known as biofilms and colonization of microbes on inanimate objects. - answerFimbriae The transfer of DNA between bacterial cells is called --------- - answerConjugation Bacterial pili are composed of the protein ---------- - answerpilin Bacteria are able to attach to surfaces and other bacteria using the surface appendages known as --------- and ---------------. - answerfimbriae. pili Which of the following bacteria could exhibit phototaxis? a)Staphylococcus aureus B)Helicobacter pylori C)Escherichia coli D)Photosynthetic bacteria - answerPhotosynthetic bacteria Neisseria gonorrhoeae binds to the epithelial cells of the reproductive tract by means of which of the following? a)Fimbriae b)F pilus c)Type IV pili d)Peritrichous flagella - answerType IV pili Which of the following bacteria use their flagella to invade mucus membranes and cause infections? a)Vibrio cholerae b)Streptococcus pneumoniae c)Helicobacter pylori d)Bacillus anthracis - answerVibrio cholerae, Helicobacter pylori The -------- ----------- is a protective covering in some bacteria. It is composed of thousands of copies of a single protein. - answers layer Elongated, rigid tubes on gram-negative bacteria that are involved in the transfer of DNA from one cell to another are called which of the following? a)Slime layers b)Conjugation pili c)Sex fimbriae d)Axial filaments - answerConjugation pili What is the glycocalyx? a)An intracellular substance that confers antibiotic resistance to the cell b)An enzyme present in the periplasmic sp