Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 11977
TLS Online TPP Program

#Question id: 3301

 Following statement is correct regarding convergent evolution.

#Section 3: Genetics, Cellular and Molecular Biology

  1. Spreading of species to different and isolated environments which blocks the gene flow among the distinct populations

  2. Flipper of whale and Fin of fish is one example of convergent evolution

  3. Environmental induced force allowed to homologous organ being modified to new function

  4. Sympatric speciation leads to divergence of one species in to two are more descendant species

More Questions
TLS Online TPP Program

#Question id: 3723

#Section 3: Genetics, Cellular and Molecular Biology

Nick translation is a process for
TLS Online TPP Program

#Question id: 3805

#Section 3: Genetics, Cellular and Molecular Biology

A newly replicated DNA duplex is likely to have:
TLS Online TPP Program

#Question id: 14860

#Section 4: Fundamentals of Biological Engineering

A fermentation slurry containing Streptomyces kanamyceticus cells is filtered using a continuous rotary vacuum filter. 120 kg h- 1 slurry is fed to the filter; 1 kg slurry contains 60 g cell solids. To improve filtration rates, particles of diatomaceous-earth filter aid are added at a rate of 10 kg h- 1. The concentration of kanamycin in the slurry is 0.05% by weight. Liquid filtrate is collected at a rate of 112 kg h-1; the concentration of kanamycin in the filtrate is 0.045% (w/w). Filter cake containing cells and filter aid is continuously removed from the filter cloth.
 What percentage liquid is the filter cake?
TLS Online TPP Program

#Question id: 2151

#Section 2: General Biology

Which of the following statement(s) is (are) true of transmembrane proteins?

a. All contain a hydrophobic α helix.

b. Some serve as membrane attachment sites for peripheral membrane proteins.

c. Some contain more than one membrane-spanning domain.

d. All are asymmetrically oriented in the lipid bilayer.
TLS Online TPP Program

#Question id: 10519

#Section 6: Plant, Animal and Microbial Biotechnology

Which of the following toxins derived from the fungus Cochliobolus carbonum inhibits specific histone deacetylases in maize?