List of top Biology Questions

Whose skulls ‘A’, ‘B’, and ‘C’ are shown below? Which of the two are more similar to each other?
Production of Biological Products:
How are such drugs consumed?
Where does EcoRI cut the palindrome? Write the events followed thereafter to form a recombinant DNA.
Chemical Safety Testing:
Name ‘A’ and ‘B’ fragments.
Name the human body organ affected by the consumption of these drugs.
Studying Diseases:
Write the ‘palindrome’ recognized by EcoRI.
Name the group of drugs whose skeletal molecule is shown below:
Study the graph given below that represents the changes in the thickening of the uterine wall in women ‘X’ and women ‘Y’ over a period of one month:
What does the graph with respect to women ‘X’ and woman ‘Y’ indicate? Give a suitable reason.
Explain Brood parasitism with the help of a suitable example.
Differentiate between grazing food chain and detritus food chain.
Draw a well-labelled diagram of the sectional view of a male gametophyte/microspore of an angiosperm and write the functions of any two parts labelled. (Any four labels).
Name any two hotspots in India.
Assertion (A): Some aquatic ecosystems have inverted biomass pyramids.
Reason (R): More energy is required by organisms occupying higher trophic levels.
Assertion (A): Plasmids are autonomously replicating circular extra-chromosomal DNA.
Reason (R): Plasmids are usually present in eukaryotic cells.
Assertion (A): Patents are granted by governments to an inventor.
Reason (R): Patents prevent others from commercial use of an invention.
What is artificial insemination in ART? Under what conditions is the person medically advised to go for it?
Assertion (A): A given fig species can be pollinated only by its partner wasp.
Reason (R): The wasp pollinates the fig inflorescence while searching for suitable egg-laying sites.
Why does a patient of ADA-deficiency require repeated infusions of genetically engineered lymphocytes? Suggest a possible permanent remedy.
Which of the chromosome in a human possesses the least number of genes?
The ‘molecular scissors’ fall in the category of:
Homologous organs indicate:
Identify the category of genetic disorder depicted in the pedigree chart given below: