True/False _____ 1. When plotted logarithmically microbial death rates will be l

Question

True/False

_____ 1. When plotted logarithmically microbial death rates will be linear.

_____ 2. The vast majority of eukaryotes divide by binary fission.

_____ 3. Biochemical tests can be used to identify microbes that cannot be cultured in the laboratory.

_____ 4. Commercial sterilization is more thorough than sterilization.

_____ 5. The exact chemical composition is known for a complex media.

_____ 6. Some bacteria can utilize N2 gas in a process called nitrogen fixation.

_____ 7. In order to be classified as a eukaryotic species closely related organisms must be able to produce offspring that are viable and fertile.

_____ 8. All bacteria are capable of fermentation.

_____ 9. Soap is NOT bactericidal.

_____10. Serial dilutions and plate counts can be used to identify bacterial species

Explanation / Answer

1. True : Bacteria usually die at a constant rate

2. false : prokaryotes diviode by binary fission mainly while eukaryotes divide by mitosis

3. True: biochemical tests can give us the idea about type of bacteria as well as some of the features to characterize them without culturing. ex. gram staining of sample to know the type of bacteria in unknown sample

4. true :Radiation is much uniform than heating.

5.true: EX. Nutrient agar- it contain peptone and yeast extract but the constituent of these components not known so called complex.

6. true: bacteria utilize and convert the nitrogen gas to nitrite and then to nitrate which is utilized by plants.

7.false: eukaryotes need to have a fully developed nucleus with membrane bound cell organelles, it can produce offspring sexually as well as asexually

8.True: yes all bacteria covert CO2 via fermentation.

9. False: Soap is having bactericidal activity. ex. dettol, liffebuoy.

10. False: this technique is used to get single colonies or to seggregate different bacterial colonies.

but species can be identified using biochemical assay and molecular technique like sequencing.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.