• RD Sharma
    • RD Sharma Class 12 Solutions
    • RD Sharma Class 11 Solutions
    • RD Sharma Class 10 Solutions
    • RD Sharma Class 9 Solutions
    • RD Sharma Class 8 Solutions
    • RD Sharma Class 7 Solutions
    • RD Sharma Class 6 Solutions
  • JEE Main
  • Class 12
    • Class 12 Science
      • NCERT Solutions for Class 12 Maths
      • NCERT Solutions for Class 12 Physics
      • NCERT Solutions for Class 12 Chemistry
      • NCERT Solutions for Class 12 Biology
      • NCERT Solutions for Class 12 Economics
      • NCERT Solutions for Class 12 Computer Science (Python)
      • NCERT Solutions for Class 12 Computer Science (C++)
      • NCERT Solutions for Class 12 English
      • NCERT Solutions for Class 12 Hindi
    • Class 12 Commerce
      • NCERT Solutions for Class 12 Maths
      • NCERT Solutions for Class 12 Business Studies
      • NCERT Solutions for Class 12 Accountancy
      • NCERT Solutions for Class 12 Micro Economics
      • NCERT Solutions for Class 12 Macro Economics
      • NCERT Solutions for Class 12 Entrepreneurship
    • Class 12 Humanities
      • NCERT Solutions for Class 12 History
      • NCERT Solutions for Class 12 Political Science
      • NCERT Solutions for Class 12 Economics
      • NCERT Solutions for Class 12 Sociology
      • NCERT Solutions for Class 12 Psychology
  • Class 11
    • Class 11 Science
      • NCERT Solutions for Class 11 Maths
      • NCERT Solutions for Class 11 Physics
      • NCERT Solutions for Class 11 Chemistry
      • NCERT Solutions for Class 11 Biology
      • NCERT Solutions for Class 11 Economics
      • NCERT Solutions for Class 11 Computer Science (Python)
      • NCERT Solutions for Class 11 English
      • NCERT Solutions for Class 11 Hindi
    • Class 11 Commerce
      • NCERT Solutions for Class 11 Maths
      • NCERT Solutions for Class 11 Business Studies
      • NCERT Solutions for Class 11 Accountancy
      • NCERT Solutions for Class 11 Economics
      • NCERT Solutions for Class 11 Entrepreneurship
    • Class 11 Humanities
      • NCERT Solutions for Class 11 Psychology
      • NCERT Solutions for Class 11 Economics
      • NCERT Solutions for Class 11 Indian Economic Development
  • Class 10
    • NCERT Solutions for Class 10 Maths
    • NCERT Solutions for Class 10 Science
    • NCERT Solutions for Class 10 Social Science
    • NCERT Solutions for Class 10 English
    • NCERT Solutions For Class 10 Hindi Sanchayan
    • NCERT Solutions For Class 10 Hindi Sparsh
    • NCERT Solutions For Class 10 Hindi Kshitiz
    • NCERT Solutions For Class 10 Hindi Kritika
    • NCERT Solutions for Class 10 Sanskrit
    • NCERT Solutions for Class 10 Foundation of Information Technology
  • Class 9
    • NCERT Solutions for Class 9 Maths
    • NCERT Solutions for Class 9 Science
    • NCERT Solutions for Class 9 Social Science
    • NCERT Solutions for Class 9 English
    • NCERT Solutions for Class 9 Hindi
    • NCERT Solutions for Class 9 Sanskrit
    • NCERT Solutions for Class 9 Foundation of IT
  • NCERT Solutions
    • NCERT Solutions for Class 12
    • NCERT Solutions for Class 11
    • NCERT Solutions for Class 10
    • NCERT Solutions for Class 9
    • NCERT Solutions for Class 8
    • NCERT Solutions for Class 7
    • NCERT Solutions for Class 6
    • NCERT Solutions for Class 5
    • NCERT Solutions for Class 4
    • NCERT Solutions for Class 3
  • CBSE Sample Papers
    • CBSE Sample Papers for Class 12
    • CBSE Sample Papers for Class 11
    • CBSE Sample Papers for Class 10
    • CBSE Sample Papers for Class 9
    • CBSE Sample Papers Class 8
    • CBSE Sample Papers Class 7
    • CBSE Sample Papers Class 6
  • Lakhmir Singh
    • Lakhmir Singh Class 10 Physics
    • Lakhmir Singh Class 10 Chemistry
    • Lakhmir Singh Class 10 Biology
    • Lakhmir Singh Class 9 Physics
    • Lakhmir Singh Class 9 Chemistry
    • PS Verma and VK Agarwal Biology Class 9 Solutions

Learn CBSE

NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12

NCERT Solutions For Class 12 Biology Biotechnology and its Applications

August 16, 2017 by phani Leave a Comment

NCERT Solutions For Class 12 Biology Biotechnology and its Applications

QUESTIONS FROM TEXTBOOK SOLVED

1.Crystals of Bt toxin produced by some bacteria do not kill the bacteria themselves because –
(a)bacteria are resistant to the toxin
(b)toxin is immature;
(c)toxin is inactive;
(d)bacteria encloses toxin in a special sac.
Ans. (c) Toxin is inactive.

2. What are transgenic bacteria? Illustrate using any one example.
Ans. Bacteria carrying foreign gene are called transgenic bacteria. For example, two DNA sequences (A and B chains of human insulin) were introduced into the plasmid ofbacteria E.coli. The leansgenic bacteria start producing insulin chains.

3. Compare and contrast the advantages and disadvantages of production of genetically modified crops.
Ans.
ncert-solutions-for-class-12-biology-biotechnology-and-its-applications-1

4.What are Cry proteins? Name an organism that produce it. How has man exploited this protein to his benefit?
Ans.Cry proteins are protein responsible for killing lepidopteran insect and their larvae (also called Bt toxin). It is secreted by Bacillus thuringienesis. Man exploited gene encoding this toxin, by transferring it into cotton genome with the help of Agrobacterium TDN A as vector.

5.What is gene therapy? Illustrate using the example of adenosine deaminase (ADA) deficiency.
Ans. Gene therapy is correction of malfunctioning / gene by repairing or adding correct copy. ADA (adenosine deaminase deficiency) is a very rare genetic disorder due to deletion of the gene for adenosine deaminase. The enzyme is crucial for the immune system to functions. It can be treated by gene therapy. This gene is transfected into early embryonic cells of bone marrow for permanent use.

6. Digrammatically represent the experimental steps in cloning and expressing an human gene (say the gene for growth hormone) into a bacterium like E. coli ?
Ans.
ncert-solutions-for-class-12-biology-biotechnology-and-its-applications-2

7. Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil?
Ans. The genes for the formation of oil in the seed should be identified. The appropriate genes should be removed with the help of restriction endonucleases. Such DNA should then be treated with DNA ligases to make seal DNA at the broken ends. These cells when grown aseptically on nutrient medium will differentiate into a new plant whose seeds will not have oil in them.

8. Find out from internet what is golden rice.
Ans. Golden rice is transgenic rice having gene coding
for vitamin A synthesis enzyme. Golden rice was developed by Swiss Federal Institute of Technology, rich in vitamin A (beta carotene). The rice grains are golden yellow in colour due to colour it gets from the beta carotene.

9. Does our blood have proteases and nucleases?
Ans. No, blood does not have protease and nuclease.If it would have been there blood and cell would have been digested, some protease do exist in inactive form.

10.Consult internet andflnd out howto makeorally activ&protein pharmaceutical. What is the major problem to be encountered?
Ans. Orally active protein product that is successfully manufactured is vaccines for preventions of infectious diseases such as hepatitis B, herpes, influenza, etc. Gene for antigen are isolated from bacteria and grown along with cut leaf portions of potato plant in antibiotic medium – followed by callus formation and recombinant/transgenic potato are obtained which contain those vaccines.

More Resources for CBSE Class 12:

  • CBSE Class 12 Maths
  • RD Sharma class 12 Solutions
  • CBSE Class 12th English Flamingo
  • CBSE Class 12th English Vistas
  • CBSE Class 12 Accountancy
  • CBSE Sample Papers For Class 12

​NCERT SolutionsMathsPhysicsChemistryBiologyScience​

Advertisements

Share this:

  • Click to share on WhatsApp (Opens in new window)
  • Click to share on Facebook (Opens in new window)
  • Click to share on Google+ (Opens in new window)
  • Click to share on Twitter (Opens in new window)
  • Click to share on Pinterest (Opens in new window)
  • More
  • Click to email this to a friend (Opens in new window)

Filed Under: CBSE, Class 12 Biology Tagged With: CBSE Class 12 Biology Solutions, CBSE Class 12 NCERT Solutions, CBSE Solutions, Free Class 12 Biology Solutions, Free NCERT Solutions, NCERT Books Solution, NCERT CBSE Class 12 Biology Solutions, NCERT CBSE Solutions, NCERT Class 12 Biology Solutions, NCERT Solutions, NCERT Solutions For Class 12 Biology Biotechnology and its Applications, NCERT Solutions For Class 12 Biology Solutions, NCERT Solutios For Class 12 Biology Chapter

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

NCERT Exemplar problems With Solutions CBSE Previous Year Questions with Solutoins

Recent Posts

  • NEET
  • NCERT Solutions for Class 1 English Chapter 21 The Tailor and his Friend
  • NCERT Solutions for Class 1 English Chapter 20 Flying-Man
  • NCERT Solutions for Class 1 English Chapter 19 Anandi’s Rainbow
  • NCERT Solutions for Class 1 English Chapter 18 Clouds
  • NCERT Solutions for Class 1 English Chapter 17 The Tiger and the Mosquito
  • NCERT Solutions for Class 1 English Chapter 16 A Little Turtle
  • NCERT Solutions for Class 1 English Chapter 15 Sundari
  • NCERT Solutions for Class 1 English Chapter 14 A Kite
  • NCERT Solutions for Class 2 English Chapter 21 The Grasshopper and the Ant

RD Sharma Solutions

RD Sharma Class 12 SolutionsRD Sharma Class 11
RD Sharma Class 10RD Sharma Class 9
RD Sharma Class 8RD Sharma Class 7
RD Sharma Class 6TS Grewal Accountacy

NCERT Solutions

NCERT Solutions for Class 10
NCERT Solutions for Class 9
NCERT Solutions for Class 8
NCERT Solutions for Class 7
NCERT Solutions for Class 6

Social Profiles

Like us on FacebookFollow us on Twitter
Watch Youtube Videos Follow us on Google Plus
NCERT Exemplar Problems

Copyright © 2019 · Magazine Pro Theme on Genesis Framework · WordPress · Log in

loading Cancel
Post was not sent - check your email addresses!
Email check failed, please try again
Sorry, your blog cannot share posts by email.