List of top Biology Questions

Briefly describe the mechanism of transcription in prokaryotes.
Exine layer of pollen grain is made up of
Describe the structure of a typical biogas plant with the help of a suitable diagram.
Write short notes on the following: (i) Vaccination (ii) Bio-fertilizer
Differentiate between innate immunity and acquired immunity giving suitable examples.
What are cloning vectors? Write a short note on characteristics of cloning vectors.
What are transgenic animals? Describe the benefits of transgenic animals in brief.
Describe the law of independent assortment in a dihybrid cross.
Describe the applications of r-DNA technology in medicine.
Write short note on primary and secondary lymphoid organs.
Write a note on Intra-Uterine Devices (IUD’s) and their applications.
Comment upon Gause’s "competitive exclusion principle".
What is multiple allelism? Give an example.
Describe the process and importance of artificial hybridization in brief.
What is age pyramid? Give a diagrammatic representation of the age pyramid of an expanding human population.
Give a brief account of different components of a nucleotide.
Write a note on enzymes used in DNA replication.
Draw a well-labelled diagram of an antibody molecule.
What are alleles?
Name the hormone synthesised and secreted by Leydig cells.
Give names of any two artificial ecosystems.
Write the names of different parts of a typical stamen.
Give a classical example of adaptive radiation.
Which of the following is an example of commensalism?
Mendel’s finding related to inheritance of characters were rediscovered by: