200 Best MCQs on downstream processing- biochemical engineering
Q9). Selectivity can be expressed as
a).ratio of the distribution coefficients in different solute
b).mass fraction of the solute in the extract phase at equilibrium
c).mass fraction of the solute in the raffinate phase
d).ratio of the mass fraction of the solute in the extract phase to the raffinate phase
Correct Answer:
ratio of the distribution coefficients in different solute
Explaination:
Q10). The disk centrifuge is the type of centrifuge used most often for bio separations due to its
a).continuous operation
b).lesser cost
c).higher speed
d).ease in operation
Correct Answer:
lesser cost
Explaination:
Q11). The effectiveness of a solvent can be measured by the
a).distribution coefficients
b).selectivity
c).both (a) and (b)
d).diffusivity
Correct Answer:
both (a) and (b)
Explaination:
Q12). The stage wise operation of adsorption is called
a).contact filtration
b).conventional adsorption
c).affinity adsorption
d).ion exchange
Correct Answer:
contact filtration
Explaination:
Q13). Which of the following is not the physical method for the cells rupturing?
a).Milling
b).Homogenization
c).Ultrasonication
d).Enzymatic digestion
Correct Answer:
Enzymatic digestion
Explaination:
Q14). Conventional adsorption is a
a).reversible process
b).irreversible process
c).either reversible or irreversible
d).none of these
Correct Answer:
reversible process
Explaination:
Q15). If the solute passes through membrane freely, the the rejection coefficient (s) is
a).1
b).0
c).>1
d).<1
Correct Answer:
0
Explaination:
Q16). If the membrane rejects all solute, the rejection coefficient (s) is
a).1
b).0
c).>1
d).<1
Correct Answer:
1
Explaination: