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TLS Online TPP Program

#Question id: 4594

Which one of the following observations did Darwin first make during his discovery of evolution?

#XL - S Microbiology

  1. The ability of individuals to survive and reproduce is not equal.

  2. There is variation in inherited traits.

  3. Individuals who reproduce more leave more offspring.

  4. The unequal ability to reproduce leads to the accumulation of favorable traits in a population.

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TLS Online TPP Program

#Question id: 18498

#XL - Q Biochemistry

Calculate the percentage of histidine that has its imidazole side chain protonated at pH 7.3. The pKa values for histidine are pK1 = 1.8, pK2 (imidazole) = 6.0, and pK3 = 9.2.
TLS Online TPP Program

#Question id: 3463

#XL - T Zoology

Which one of the following statements is INCORRECT?
TLS Online TPP Program

#Question id: 10570

#XL - R Botany

The diffusion coefficient (Ds ) is a characteristic of the substance

a) diffusion in liquid is much faster than diffusion in air

b) larger molecules have smaller diffusion coefficients

c) diffusion in air is much faster than diffusion in a liquid

d) Larger molecules have larger diffusion coefficient

Which of the following combination is correct?
TLS Online TPP Program

#Question id: 419

#XL - S Microbiology

Biological oxidation-reduction reactions never involve:
TLS Online TPP Program

#Question id: 18377

#XL - S Microbiology

Why xenobiotic compounds are considered ad recalciterants?