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Biotechnology : Principles And Processes

Question
CBSEENBI12047429
Wired Faculty App

Passage cells help in

  • transport of water towards pericycle

  • transport of water towards epiblema

  • absorption of water from soil

  • passage of CO2 towards stomata

Solution

A.

transport of water towards pericycle

Passage cells are endodermal cells of older roots which have ratained thin walls and casparian strips rather than becoming suberised and waterproof- like the other cells around them, to continue to allow some symplastic flow to the inside. The radial arrangement of vascular bundles and the presence of these passage cells opposite the protoxylem facilitates the inflow of water from the pericycle in the root hair zone.

Some More Questions From Biotechnology : Principles and Processes Chapter

Give the full form of PCR. Who developed it ?

What is the source of DNA polymerase i.e., Taq polymerase ?

Define “melting of target DNA”.

What would be the molar concentration of human DNA in a human cell ? Consult your teacher.

Do eukaryotic cells have restriction endonucleases ? Justify your answer.

From what you have learnt, can you tell whether enzymes are bigger or DNA is bigger in molecular size. How did you know ?

Expand EFB.

What are two core techniques that enabled birth of biotechnology ?

What is genetic engineering? Explain briefly the distinct steps common to all genetic engineering technology.
Or
With the help of diagrams show the different steps in the formation of recombinant DNA by action of restriction endonuclease.

List three important features necessary for preparing genetically modified organism.

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