मराठी

Answer the Following Question. How is a Continuous Culture System Maintained in Bioreactors and Why? - Biology

Advertisements
Advertisements

प्रश्न

Answer the following question.
How is a continuous culture system maintained in bioreactors and why?

टीपा लिहा

उत्तर

In a continuous culture system, the used medium is drained out from one side while the fresh medium is added from the other to maintain the cells in their physiologically most active log/exponential phase. The continuous culture method produces larger biomass leading to a higher yield of the desired protein.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2018-2019 (March) 57/1/1

व्हिडिओ ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्‍न

What happens when Meloidegyne incognitia consumes cells with RNAi gene?


Golden rice is ______.


Bt cotton is not ______.


Bt toxin obtained from ______.


Gene expression can be controlled with the help of RNA. Explain the method with an example.


What are the various advantages of using genetically modified plants to increase the overall yield of the crop?


Insects in the Lepidopteran group lay eggs on maize crops. The larvae on hatching feed on maize leaf and tender cob. In order to arrest the spread of three such Lepidopteran pests, Bt maize crops were introduced in an experimental field.
A study was carried out to see which of the three species of lepidopteran pests was most susceptible to Bt genes and its product.
The lepidopteran pests were allowed to feed on the same Bt-maize crops grown on 5 fields (A-E).
The graph below shows the leaf area damaged by these three pests after feeding on maize leaves for five days.

Key for lepidopteran insect pest species

Species I
Species II
Species III

Insect gut pH was recorded as 10, 8 and 6 respectively for Species I, II and III respectively.

(a) Evaluate the efficacy of the Bt crop on the feeding habits of the three species of stem borer and suggest which species is least susceptible to Bt toxin.

(b) Which species is most susceptible to Bt-maize, and explain why?

(c) Using the given information, suggest why a similar effect was not seen in the three insect species.


Certain specific bacterial spores are mixed in water and sprayed over Brassica crop to control butterfly caterpillars.

Name this bacterium and its mode of action on the butterfly caterpillars.


"RNA interference has been used to produce transgenic tobacco plants to protect them from the infestation by specific nematodes." Explain the novel strategy exploited by the biotechnologists.


Name an organism that produce cry proteins.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×