D515 CELL PHYSIOLOGY Questions with Correct Solutions

D515 CELL PHYSIOLOGY Questions with Correct Solutions


Question:
1. Growth factors

Answer:
-nutritional factors -energy and carbon source -environmental factors


Question:
2. Mammalian cell growth factors

Answer:
-Macro and Micro -essential nutrients that mammalian cells cant synthesize (9 essential
amino acids, vitamins, 2 fatty acids (alpha-linolenic acid and linoleic acid)


Question:
3. Bacteria cell growth factors

Answer:
-Macro and Micro -most bacterial have pathways to synthesize essential nutrients (all amino
acids, all lipids, vitamins, unusual carbohydrates (NAM))


Question:
4. auxotrophs

Answer:
incapable of de novo synthesis of one or more essential nutrients (many oral bacteria)


Question:
5. oral bacteria nutritional supplements

Answer:
cross-feeding in polymicrobial biofilms


Question:
6. Catabolism

Answer:
energy-yielding metabolism (breaks down)


Question:
7. Anabolism

, Answer:
biosynthesis metabolism (building up)


Question:
8. Energy sources

Answer:
-light -chemical energy


Question:
9. Carbon sources

Answer:
-CO2 -organic compound


Question:
10. Chemoheterotrophs

Answer:
energy and carbon sources are both derived from (single) organic compounds (Mammalian
cells)


Question:
11. Environmental factors: Temperature

Answer:




Question:
12. Mesophiles (oral bacteria)

Answer:
-temperature in oral cavity is between 35-36 degrees celcius -perodental pocket in active
disease: up to 39 degrees celcius