Class 12th Biology 2016 Set3 Delhi Board Paper Solution
Question 3
Suggest a technique to a researcher who needs to separate Fragments of DNA.
Answer
Gel Electrophorresis is the technique by which separate Fragments of DNA can be possible. Here DNA molecules are separated using electric field. DNA being negatively charged moves towards anode through a matrix.
Popular Questions of Class 12th biology
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(a) Adaptations of desert plants and animals
(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
(e) Effect of temperature or water scarcity and the adaptations of animals. - Q:- With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.
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- Q:- With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.
- Q:- Explain the Law of Dominance using a monohybrid cross.
Recently Viewed Questions of Class 12th biology
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(a) 100%
(b) 50 %
(c) 1-5%
(d) 2-10% - Q:-
What is meant by monosporic development of female gametophyte?
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- Q:- Fill in the blanks.
(a) Plants are called as_________ because they fix carbon dioxide.
(b) In an ecosystem dominated by trees, the pyramid (of numbers) is _________ type.
(c) In aquatic ecosystems, the limiting factor for the productivity is _________.
(d) Common detritivores in our ecosystem are_________.
(e) The major reservoir of carbon on earth is_________. - Q:- Offspring formed due to sexual reproduction have better chances of survival. Why? Is this statement always true?
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