Reference no: EM132556056
1. In positive control, the activator binds a DNA sequence located between the promotor and the coding sequence of the first gen
a) True
b) False
2. Which method of DNA regulation depends upon whether a leader sequence is translated?
a) Positive control
b) Enzyme repression
c) Enzyme induction
d) Attenuation
3. What is secreted from both natural killer (NK) cells and cytotoxic T (TC) cells from holes in the cell membranes leading to the eventual destruction of the target?
a) Lysomes
b) Perforin
c) Complement
d) Bacteriocin
4. Which of the following statement is False concerning phage therapy?
a) Both phage therapy and bacteriocin (colicins) are possible alternatives for antibiotic
b) A cocktail (or mixture) of several kinds of phage is typically administered to the patient
c) Example of intravenous administration of phage in the united states
d) With phage therapy, it is impossible for the bacteria to develop resistance to the treatment
5. Which of the following is region of F factor that is transferred first during conjugation?
a) oriV
b) att
c) oriT
d) cos
6. which one of the following is not an example of mutagen?
a) Transposons
b) Mu virus
c) Nitrogen acid
d) Hydrochloric acid
7. For every TADH produced during the Kreb cycle, 3 ATP are generated in the electron
a) True
b) False
8. Which of the following is a team describing the process occurring in temperate phage where the viral genome becomes incorporated into the chromosomes of the host bacterrum
a) Lysogeny
b) Inversion
c) Transposition
d) Intercalation
9. In photosynthetic bacteria, reduced electron carries like NADH, may be used to produce ATP by electron transport or they may be used to fix (incorporate) CO2
A) True
B) False
10. Which of the following is not a example of nonspecific response
a) The outward flow of urine
b) T cell-mediated lysis
c) Lysomes in tears and other body secretions
d) Inflammation
11. What is the name for a mutagen that insets itself between 2 base pairs so that an extra base is added during DNA replication? Ethidium bromide DNA is an exmple.
a) Base analos
b) Transposon
c) Ionizing
d) Intercalating agent
12. In which situation is recombination not necessary?
a) Electroporation with pasmid DNA
b) Generalized transduction
c) Hfr x F- mating
d) Transformation with chromosomal DNA
13. Which of the following is an example of spontaneous mutation?
a) UV light exposure
b) Infection with bacteriophage Mu
c) DNA replication mistakes
d) Acridine dye consumption
14. Which type of vaccine makes used of attenuated organism?
a) "Killer" vaccine
b) Recombinant vaccine
c) DNA vaccine
d) "Live" vaccine
15. What is not necessary for a T cell to have in order to respond to a virally-infected cell bearing cell I MHC marked on its surface?
a) cD8
b) A nucleus
c) cD4
d) a TcR (T cell receptor)
16. which of the following is false?
a) There is a clear link between childhood measles (MMR) vaccination and the development of autism
b) On function of the bacteria lining the gastrointestinal tract (and microbitain also known as completive exclusion
c) Studies in rodent models suggest the maternal microbiome as well as certain viral infections can influence brain development and ultimately behaviors in the offspring
d) If we include the microbiola, only 10% of the total # of cells in human are actually human cells
17. In the following coupled reaction, ethanol has been reduced (True or False)?
Acetaldehyde + NADHEthanol + NAD+
18. Which of the following mechanisms of enzymes regulation doe NOT involve an allosteric site?
a) Isoenzymes
b) Noncompetive inhibition
c) End-product inhibition
d) Competitive inhibition
19. Complement activation may be triggered by either the composition of the cell surface or by antibody covering a potential target
a) True
b) False
20. Which form of global regulation relles upon cyclic AMP levels?
a) Two components regulatory system
b) Catabolite repression
c) Chaperonins
d) Alternate sigma factor
21. Virus tend to be very helical in nature. they may be filamentous or have the soccer ball shape of 20-slide sphere, called a/an____
a) Ellipse
b) Helix
c) Icosahedron
d) Coccoid
22. Which of the following is an example of a conditional lethal mutation?
a) Inversion
b) Temperature-sensitive mutation
c) Translocation
d) Thymine-thymine dimer
23. Which of the following mechanism of enzymes regulation involves different enzymes that catalyze the same reaction? The DAHP synthetases are example
a) End product inhibition
b) Covalent modification
c) Competive inhibiton
d) Isoenzymes
24. Which of the following is NOT a function of the Fc portion of the antibody molecules?
a) Determines antibody class (IgG, IgA etc)
b) Activities cells that have receptors for the Fc portion
c) Binds the antigen
d) Area where carbohydrates are located
25. In sertion equals mutation for all biological mutagens targeting bacteria
a) True
b) False