Downstream Processing – Section 1

11. The disk centrifuge is the type of centrifuge used most often for bioseparations due to its

A. continuous operation
B. lesser cost
C. higher speed
D. ease in operation

Correct Answer: B. lesser cost

12. The effectiveness of a solvent can be measured by the

A. distribution coefficients
B. selectivity
C. both (a) and (b)
D. diffusivity

Correct Answer: C. both (a) and (b)

13. The stage wise operation of adsorption is called

A. contact filtration
B. conventional adsorption
C. affinity adsorption
D. ion exchange

Correct Answer: A. contact filtration

14. Which of the following is not the physical method for the cells rupturing?

A. Milling
B. Homogenization
C. Ultrasonication
D. Enzymatic digestion

Correct Answer: D. Enzymatic digestion

15. Conventional adsorption is a

A. reversible process
B. irreversible process
C. either reversible or irreversible
D. none of these

Correct Answer: A. reversible process

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