Odour, freshness and taste of food can be measured by using ________.a) Bio-Chips b) Bio-sensor c) Biotic signals d) Bio-technology

(a) Outline the primary categories of microorganisms found in the microbial world. (b) Discuss the basic characteristics of the microorganism mentioned in (a) above. (c) Provide one example from each category and explain their role in the environment or human life.

32) What is the goal of bioremediation? A) To improve human health with the help of living organisms such as bacteria B) To clean up areas polluted with toxic compounds by using bacteria C) To improve soil quality for plant growth by using bacteria D) To improve bacteria for production of useful chemicals E) To kill pathogenic bacteria with the use of antibiotics 33) An organic solvent widely used in industrial processes, 1,1,1-trichloroethane (TCA), is a major environmental pollutant affecting human health and damaging the ozone layer. Recently, researchers isolated the first bacteria able to degrade TCA. They found that the bacteria use hydrogen as an electron donor, TCA as an electron acceptor, and acetate as a carbon source. Based on the preceding information, deduce the method used to isolate these bacteria. A) Gram staining B) Enrichment culture C) Direct sequencing D) Seeding 34) Multicellularity and large body size of eukaryotic organisms require high metabolic rates and…

22) Which of the techniques/characteristics below may be used to identify a target bacterium in a pool of microorganism? a) its morphology b) its growth requirement c) antibody-antigen interaction ) d) all of the above. ) e) a and c 23) What is the process that produces alcohol in S. cerevisiae (yeast)? () a) Respiration ( b) Sedimentation c) Photosynthesis )d) Fermentation 24) Identify the most mistaken (wrong) choice: a) Halophiles are those organisms that like high salt concentrations. ) b) Some bacteria reproduce by binary fission. ( c) A fungus cell contains a true nucleus. d) During the lag phase of growth, the metabolic activity is very low

Provide an example of an organism within each of the four main nutritional categories of microbes and describe how each obtains its essential nutrients. Provide evidence in support of or refuting the following statement: Microbial life can exist in the complete absence of both sunlight or organic nutrients. Polymerase chain reaction (PCR) is a technology that requires high temperatures to reproduce DNA fragments. Explain why the discovery of thermophilic archaea and their associated DNA polymerases was critical to the success of this technique. Summarize how the electron transport chain functions to produce ATP in a bacterial cell versus eukaryotic cell. Explain whether or not the term chemiosmosis accurately illustrates this process.

You plated 1.0 mL of a sample diluted by a factor of 10^-5 and you counted 50 comonies after incubation. The concentration of bacteria in the stock culture is: A) 5x10^5 B) 5x10^4 C) 50x10^4 D) 50x10^-6 E) 5x10^-4

4. All the following can be autoclaved EXCEPT: a) Biological material b) Glass ware c) Radioactive material d) Broth and gel media for growing bacteria5. The autoclave raises the atmospheric pressure to _____ : a) 10 psi b) 15 psi c) 20 k joules d) 25 watts6. In the experiment with serial dilutions, the plates which should be used for the final count for colonies should have a range of _______ CFU in order to have a reliable estimate: a) <10 b)10-15 c) 15-20 d) none of the above

Which technique is preferred in the separation of fatty acyl methyl esters from a mixture?a) Gas-liquid chromatographyb) Absorption chromatographyc) TLCd) Centrifugation

What is the Carbon content of Cast Irons? Group of answer choices a) Less than 2% b) More than 2% c) Less than 14% d) More than 14%

What is the Carbon content of Cast Irons? O a) Less than 2% O b) More than 2% Od Less than 14% O d) More than 14%