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TLS Online TPP Program

#Question id: 32936

Decimal reduction time (D-value) is:

#XL - S Microbiology
  1. Directly proportional to the thermal death rate constant
  2. Inversely proportional to the thermal death rate constant
  3. Independent of the thermal death rate constant
  4. Dependent on initial microbial load but not on the thermal death rate constant 
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TLS Online TPP Program

#Question id: 9608

#XL - S Microbiology

Darwin analogized the effects of evolution as the above-ground portion of a many-branched tree, with extant species being the tips of the twigs. The common ancestor of two species is most analogous to which anatomical tree part?
TLS Online TPP Program

#Question id: 34547

#XL - S Microbiology

Which statements correctly describe porins in Gram-negative bacteria?
TLS Online TPP Program

#Question id: 1743

#XL - Q Biochemistry

The main costimulatory signal for activation of resting T-cells is provided by ligation of:
TLS Online TPP Program

#Question id: 9276

#XL - R Botany

The carotenoid b-carotene, whose structure and absorption spectrum at,
TLS Online TPP Program

#Question id: 1714

#XL - Q Biochemistry

In a lymph node, the antigen pneumococcus polysaccharide SIII leads to: