Class 12th Biology 2012 Set1 Delhi Board Paper Solution
Question 9
Draw a neat labeled sketch of a replicating fork of DNA.
Answer
The replication fork of DNA
Popular Questions of Class 12th biology
- Q:- Why is reproduction essential for organisms? Answer
- Q:- Differentiate between a zoospore and a zygote.
- Q:- What is spermatogenesis? Briefly describe the process of spermatogenesis.
- Q:- With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.
- Q:- Differentiate between microsporogenesis and megasporogenesis. Which type of cell division occurs during these events? Name the structures formed at the end of these two events.
- Q:- Differentiate between gametogenesis from embryogenesis.
- Q:- What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.
- Q:- What is oogenesis? Give a brief account of oogenesis.
- Q:- Define
(a) Juvenile phase
(b) Reproductive phase
(c) Senescent phase. - Q:- Higher organisms have resorted to sexual reproduction in spite of its complexity. Why?
Recently Viewed Questions of Class 12th biology
- Q:- Explain the Law of Dominance using a monohybrid cross.
- Q:- Explain (in one or two lines) the function of the followings:
(a) Promoter
(b) tRNA
(c) Exons - Q:- List 10 modern-day animals and using the internet resources link it to a corresponding ancient fossil. Name both.
- Q:- Why is apple called a false fruit? Which part(s) of the flower forms the fruit?
- Q:- List any three important characteristics of a population and explain
- Q:- Select the statement which explains best parasitism.
(a) One organism is benefited.
(b) Both the organisms are benefited.
(c) One organism is benefited, other is not affected.
(d) One organism is benefited, other is affected. - Q:-
With the help of suitable diagram describe the logistic population growth curve.
- Q:- List the various abiotic environmental factors.
- Q:- Define the following terms and give one example for each:
(a) Commensalism
(b) Parasitism
(c) Camouflage
(d) Mutualism
(e) Interspecific competition - Q:- Define population and community.
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