List of top Biology Questions

What is reproductive isolation? Describe any two types each of pre-mating and post-mating isolating mechanism.
Explain the steps involved in preliminary treatment of sewage.
What are the limitations of root pressure theory?
Explain different steps involved in PCR technique.
Identify A, B, and C from the above diagrams and give their functions.
Give the different steps involved in formation of m-RNA from hn-RNA.
Explain unique features of acquired immunity.
Select and rewrite appropriate disorder of respiratory system with the given symptoms : [ sinusitis, emphysema, silicosis and asbestosis, laryngitis ]
Define the following terms : (a) Gene flow (b) Chromosomal aberrations
Identify and define 'A' and 'B' in relation to uptake of water by the root :
What are the significances of double fertilization?
Distinguish between human sperm and ovum.
Describe mutualism.
Explain factors affecting water absorption.
Enlist the uses of gene therapy.
What is differentiation and redifferentiation?
What are the reasons for the success of Mendel?
Give the name of endocrine gland which is prominent at birth but gets gradually atrophied in adult stage.
How many meiotic divisions are required for the formation of 300 seeds in angiosperm?
What is the full form of IAA?
Explain the term Emigration.
Give the name of microbial source of antibiotic chloromycetin.
Arrange the following steps of DNA fingerprinting in correct sequence :

Gel electrophoresis
Isolation of DNA
Southern blotting
Restriction digestion
Which cells of islets of Langerhans produce a hormone insulin?
Which of the following types require pollinator but result is genetically similar to autogamy?