201. Which method prevents growth by removal of water?
Answer: C. Drying (dehydration)
Biology Class 11 Unit 6: Prokaryotes MCQs
227 multiple choice questions with the correct answer for each. Tap an option to check yourself, or switch on "Show all answers". This is page 5 of 5.
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202. The cell wall of Gram-positive bacteria is differentiated from Gram-negative by:
Answer: B. thicker peptidoglycan and teichoic acid
203. Bacteria can be classified by methods of obtaining energy and:
Answer: B. carbon
204. The oval bodies are:
Answer: B. endospores
205. This bacterium is probably:
Answer: C. Bacillus or Clostridium
206. This process is a means of:
Answer: B. survival
207. When conditions become favourable the spore:
Answer: C. germinates into an active vegetative cell
208. These colonies show:
Answer: B. genetic recombination
209. The experiment was done by:
Answer: B. Lederberg and Tatum
210. The bridge between the two bacteria is formed by:
Answer: B. pilus (conjugation bridge)
211. The genetic material transferred is usually a:
Answer: B. plasmid
212. The disease is most likely:
Answer: C. cholera
213. The causative bacterium is:
Answer: B. Vibrio cholerae
214. The main treatment is:
Answer: B. replacement of fluids and electrolytes
215. The key prevention is:
Answer: B. clean water supply
216. The first phase is the:
Answer: B. lag phase
217. In the second phase the cells:
Answer: B. divide at maximum rate
218. Levelling off occurs due to:
Answer: B. nutrient exhaustion and toxic wastes
219. The last phase is called:
Answer: D. death phase
220. These organisms are:
Answer: B. cyanobacteria
221. They improve soil fertility by:
Answer: B. fixing atmospheric nitrogen in heterocysts
222. The special cell for nitrogen fixation is the:
Answer: B. heterocyst
223. These bacteria release oxygen during:
Answer: C. photosynthesis
224. The microbe belongs to:
Answer: B. archaea
225. The best term for it, if it likes hot acidic water, is:
Answer: C. thermoacidophile
226. Its RNA polymerase is similar to that of:
Answer: C. eukaryotes
227. An example of the microbe could be:
Answer: B. Thermus aquaticus
About Biology Class 11 Unit 6 MCQs (Federal Board)
These 227 Biology MCQs cover Class 11 Unit 6: Prokaryotes of the Federal Board (FBISE) HSSC-I (1st Year / Class 11) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 5 pages of 50. Use the Print button to save this chapter as a PDF.