To maintain the cells in their physiologically most active log/exponential phase during continuous culture, the used medium is drained out from one side while _________ medium is added from the other.
Fresh medium is added to maintain the active log/exponential phase.
Question 162 of 535
📘 CLASS XII
A plasmid used as a cloning vector is an autonomously replicating circular _________ DNA.
A plasmid is an autonomously replicating circular extra-chromosomal DNA.
Question 163 of 535
📘 CLASS XII
The basic utility of the biological world recognized in human knowledge is as a source of _________.
The major utility of the biological world is as a source of food.
Question 164 of 535
📘 CLASS XII
Biotechnology deals with techniques of using live organisms or _________ from organisms to produce products and processes useful to humans.
Biotechnology deals with techniques of using live organisms or enzymes from organisms.
Question 165 of 535
📘 CLASS XII
Synthesising a gene, developing a DNA vaccine or correcting a defective gene, are all processes included under _________.
These specific molecular techniques are explicitly listed as part of biotechnology.
Question 166 of 535
📘 CLASS XII
For the multiplication of any alien piece of DNA in an organism, it needs to be linked with the _________.
Alien DNA must be linked with the origin of replication to multiply.
Question 167 of 535
📘 CLASS XII
If foreign DNA is inserted into the *ampR* gene of pBR322, the recombinants would lose ampicillin resistance but could be selected out from non-recombinant ones by plating on medium containing _________ first.
The transformants must first be selected on the medium containing the antibiotic for which the resistance gene is intact.
Question 168 of 535
📘 CLASS XII
Bioreactors provide optimal conditions for achieving the desired product by providing optimum growth conditions (temperature, pH, substrate, salts, vitamins, _________).
Oxygen is listed as an optimum growth condition provided by a bioreactor.
Question 169 of 535
📘 CLASS XII
In the selection based on $\beta$-galactosidase insertion, colonies that do not produce any colour are identified as _________ colonies.
No colour means insertional inactivation occurred, identifying them as recombinant colonies.
Question 170 of 535
📘 CLASS XII
The tumor inducing (Ti) plasmid of *Agrobacterium tumifaciens* has been modified into a cloning vector which is no longer _________ to the plants.
The Ti plasmid has been modified so it is no longer pathogenic.
