TLS Online TPP Program

#Question id: 3766


Individuals with the disorder xeroderma pigmentosum are hypersensitive to sunlight, and mutations to the DNA in their skin cells are left uncorrected. Why are the mutations not corrected in individuals with this disorder?

#Section 3: Genetics, Cellular and Molecular Biology
  1. The disorder makes cells unable to replicate DNA.

  2. The disorder causes mitosis to stop during metaphase.

  3. The disorder makes cells unable to form chromosomes.

  4. The disorder causes cells to be unable to repair thymine dimers.

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TLS Online TPP Program

#Question id: 27188

#Section 5: Bioprocess Engineering and Process Biotechnology

k for a zero order reaction is 2×10-2 mol/L s. If the concentration of the reactant after 25s is 0.5 M. Calculate the initial concentration of the reactant.

TLS Online TPP Program

#Question id: 27189

#Section 5: Bioprocess Engineering and Process Biotechnology

How long will it take for the initial concentration of A to fall from 0.20 M to 0.075, if the rate constant for a reaction of zero-order in A is 0.035 mol L–1 s–1.

TLS Online TPP Program

#Question id: 27190

#Section 5: Bioprocess Engineering and Process Biotechnology

A substrate is consumed in a zero order reaction such that the concentration falls from 40 g/l to 20 g/l in 4 h. How long will it take the substrate to fall from 20 g/l to 2 g/l:

TLS Online TPP Program

#Question id: 27191

#Section 5: Bioprocess Engineering and Process Biotechnology

The half-life of a zero order reaction is 30 minutes. What is the concentration of the reactant left after 60 minutes?

TLS Online TPP Program

#Question id: 27192

#Section 5: Bioprocess Engineering and Process Biotechnology

Q) For a single substrate reaction, doubling the substrate concentration increases the rate by 10 fold. The order of the reaction is

TLS Online TPP Program

#Question id: 27193

#Section 5: Bioprocess Engineering and Process Biotechnology

In a first order reaction, 10% of the reactant is consumed in 25 minutes. Calculate : 
(1) The half-life period of the reaction