Give reasons :
Continuous culture system leads to higher yields of desired protein.

Cells in continuous culture system are maintained in

Assertion: The recombinant cells are multiplied in a continuous culture system Reason :It is to maintain the cells in their physiologically most active log/exponential phase

Give reasons : Graphite is used in the leads of pencils.

How is a continuous culture system maintained in bioreactors and why ?

Study the following statements regarding recombinant DNA technology and select the incorrect ones. (i) Taq polymerase extends the primers using the nucleotides provided in the reaction. (ii) Antibiotic resistance genes are considered as desirable genes in recombinant DNA technology. (iii) DNA fragments are separated according to their charge only, in agarose gel electrophoresis. (iv) Transformation is a procedure through which a piece of DNA is integrated in to the genome of a host bacterium. (v) To produce higher yields of a desired protein, host cells can be multiplied in a continuous culture. (vi) Downstream processing is one of the steps of polymerase chain reaction.

Study the given aquatic food chain and answer the questions that follow: (i) Give reasons why there is a continuous increase in the DDT content in different trophic levels of the chain. (ii) Name the phenomenon responsible for the increase in DDT content.

Which of the following should be chosen for best yield if one were to produce a recmobinant protein in large amounts ? (a) Laboratory flask of largest capacity (b) A stirred-tank bioreactor without in-lets and out-lets (c) A continuous culture system (d) Any of the above

Assertion: Two systems, which are in thermal equilibrium with a third system, are in thermal equilibrium with each other. Reason: The heat flows spontaneously from a system at a higher temp. to a system at a lower temp.

Select the incorrect statement for continuous culture system

Which of the following is an advantage of a bioreactor which uses continuous culture system rather than batch culture?