Class 12 Biology - Chapter Biotechnology and its Application NCERT Solutions | Name the first transgenic cow. Which gen
Name the first transgenic cow. Which gene was introduced in this cow?
Animals that have been permanently engineered by the gene insertion are known as transgenic animals and the foreign genes are added are known as transgenes. In 1981, Ralph Brinster and Richard Palmiter introduced first transgenic animal, by introducing a gene for rat growth hormone (GH) into fertilized eggs of mice.
First transgenic cow name was Rosie and is considered as different from normal cow. Transgenic cow that contains cDNA which codes for the antibacterial human iron- binding protein called lactoferrin have been produced. In this cow, human genes are transferred that are expressed in mammary tissues and then the milk contains nutritionally more balanced product, α- lactalbumin for human bodies than natural cow milk.
More Questions From Class 12 Biology - Chapter Biotechnology and its Application
- Q:- What are Cry proteins? Name an organism that produces it. How has man exploited this protein to his benefit?
- Q:- What is gene therapy? Illustrate using the example of adenosine deaminase (ADA) deficiency.
- Q:- What are transgenic bacteria? Illustrate using any one example.
- Q:- Diagrammatically represent the experimental steps in cloning and expressing an human gene (say the gene for growth hormone) into a bacterium like E. coli ?
- Q:- Compare and contrast the advantages and disadvantages of production of genetically modified crops.
- Q:- 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. - Q:- Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil?
- Q:- Find out from internet what is golden rice.
- Q:- Does our blood have proteases and nucleases?
- Q:-
Consult internet and find out how to make orally active protein pharmaceutical. What is the major problem to be encountered?
Popular Questions of Class 12 Biology
- Q:- Why is reproduction essential for organisms? Answer
- Q:- Name the parts of an angiosperm flower in which development of male and female gametophyte take place.
- Q:-
Fill in the blanks:
(a) Humans reproduce __________. (asexually/sexually)
(b) Humans are__________. (oviparous/viviparous/ovoviviparous)
(c) Fertilization is __________ in humans. (external/internal)
(d) Male and female gametes are __________. (diploid/haploid)
(e) Zygote is __________. (diploid/haploid)
(f) The process of release of the ovum from a mature follicle is called__________.
(g) Ovulation is induced by a hormone called the __________.
(h) The fusion of male and female gametes is called _____________.
(i) Fertilisation takes place in _____________.
(j) Zygote divides to form _____________which is implanted in uterus.
(k) The structure which provides vascular connection between fetus and uterus is called ____________. - Q:- What do you think is the significance of reproductive health in a society?
- Q:- Mention the advantages of selecting pea plant for experiment by Mendel.
- Q:- Group the following as nitrogenous bases and nucleosides:
Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine. - Q:- Explain antibiotic resistance observed in bacteria in light of Darwinian selection theory.
- Q:- What are the various public health measures, which you would suggest as safeguard against infectious diseases?
- Q:- Explain in brief the role of animal husbandry in human welfare.
- Q:- Bacteria cannot be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes under a microscope, which sample would you carry and why?
Recently Viewed Questions of Class 12 Biology
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(a) MALT
(b) CMI
(c) AIDS
(d) NACO
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