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:- What is spermatogenesis? Briefly describe the process of spermatogenesis.
- Q:- Why is reproduction essential for organisms? Answer
- Q:- Write a short note on
(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.
- Q:- What is DNA fingerprinting? Mention its application.
- Q:- What is oogenesis? Give a brief account of oogenesis.
- Q:- Describe the structure of a seminiferous tubule.
- Q:- What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.
- 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
- Q:- An orchid plant is growing on the branch of mango tree. How do you describe this interaction between the orchid and the mango tree?
- Q:- Differentiate between gametogenesis from embryogenesis.
- Q:- How is biodiversity important for ecosystem functioning?
- Q:- Do you think microbes can also be used as source of energy? If yes, how?
- Q:- List two essential roles of ribosome during translation.
- Q:- Offspring formed due to sexual reproduction have better chances of survival. Why? Is this statement always true?
- Q:- Define the following terms and give one example for each:
(a) Commensalism
(b) Parasitism
(c) Camouflage
(d) Mutualism
(e) Interspecific competition - Q:- If a double stranded DNA has 20 per cent of cytosine, calculate the per cent of adenine in the DNA.
- Q:- What is sewage? In which way can sewage be harmful to us?
- Q:- How do ecologists estimate the total number of species present in the world?