List of top Biology Questions asked in UP Board XII

Differentiate between any two of the following:
(i) Hypocotyl and Epicotyl
(ii) Perisperm and Pericarp
(iii) Integument and Testa
Explain the salient features of Genetic code.
Describe the disorders from the following chromosomal abnormal arrangements: (i) Trisomy of Chromosome 21 (ii) XXY
Define Parturition. Give an account of different hormones involved during this process.
Comment on in-situ and ex-situ conservation.
Explain Competition and Parasitism with examples.
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.
Explain Stirred-tank Reactor.
Mention any three vectorless methods that are used to introduce recombinant DNA into competent host cell.
Write short notes on Active Immunity and Vaccination.
Draw the schematic chart representation of Oogenesis.
Explain Logistic Growth with equation.
Explain how distribution of animals and plants is affected by light, with examples.
Explain Co-extinctions.
What is the difference between false fruit and true fruit? Under which category does the apple fall and why?
Write the names of any two cyanobacteria responsible for nitrogen fixation.
Comment on Organic Farming.
In lac operon, 'Z' and 'Y' genes code for which enzymes? Also mention their functions.
Draw only the structure of antibody molecule.
Which type of cross is used to determine the genotype of tall pea plant? Explain.
Why did Mendel select pea plants for his experiments?
Oxalis and Commelina produce which two types of flowers? Name them.
Which of the following condition is not maintained in a Bioreactor for optimum growth condition?
Sickle cell anemia is caused by substitution of Glutamic Acid by which amino acid?
Which bacterium did Frederick Griffith use for his research? Also mention the name of the disease caused by that bacterium.