List of top Biology Questions

Mention the name of causal organism of Typhoid fever.
What type of nucleus is found in bacterial cell?
How many meiotic divisions are required to get 200 grains of Barley?
Number of pollen sacs in an anther is:
Which one is found in pollen grain?
What is contact inhibition? Explain how the normal cell transforms into cancerous cell.
Differentiate between any two of the following:
(i) Hypocotyl and Epicotyl
(ii) Perisperm and Pericarp
(iii) Integument and Testa
Mention any three drawbacks of insulin obtained from the pancreas of slaughtered cattle and pigs.
Write short notes on any two of the following: (i) Adenosine Deaminase Deficiency (ii) Interspecific Competition with example (iii) Human Genome Project
Define Parturition. Give an account of different hormones involved during this process.
Describe the disorders from the following chromosomal abnormal arrangements: (i) Trisomy of Chromosome 21 (ii) XXY
Explain Competition and Parasitism with examples.
Comment on in-situ and ex-situ conservation.
Explain the salient features of Genetic code.
A colourblind father has a daughter with normal vision and the daughter marries a man with normal vision. What is the probability of her son being a carrier for colourblindness? Explain with pedigree chart.
Mention any three vectorless methods that are used to introduce recombinant DNA into competent host cell.
Explain Stirred-tank Reactor.
Write short notes on Active Immunity and Vaccination.
Explain Logistic Growth with equation.
Explain how distribution of animals and plants is affected by light, with examples.
Draw the schematic chart representation of Oogenesis.
Which type of cross is used to determine the genotype of tall pea plant? Explain.
Why did Mendel select pea plants for his experiments?
In lac operon, 'Z' and 'Y' genes code for which enzymes? Also mention their functions.
Write the names of any two cyanobacteria responsible for nitrogen fixation.