List of top Biology Questions

Whose skulls ‘A’, ‘B’, and ‘C’ are shown below? Which of the two are more similar to each other?
How do the following organisms act as bio-fertilizers? Explain.
(a) Mycorrhiza
(b) Anabaena
(c) Rhizobium
Where does EcoRI cut the palindrome? Write the events followed thereafter to form a recombinant DNA.
Write the ‘palindrome’ recognized by EcoRI.
Name ‘A’ and ‘B’ fragments.
Chemical Safety Testing:
Studying Diseases:
Production of Biological Products:
Draw a schematic diagram of an antibody molecule and label any 4 parts. Mention their chemical nature. Name the cells which produce them.
Name the human body organ affected by the consumption of these drugs.
How are such drugs consumed?
Name the group of drugs whose skeletal molecule is shown below:
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).
With reference to flower color, two independent crosses were made, one between true breeding garden pea plants and another between true breeding Antirrhinum plants. Write the phenotypes of their F$_1$ progeny. Justify your answer giving reasons.
Explain Brood parasitism with the help of a suitable example.
Differentiate between grazing food chain and detritus food chain.
Name any two hotspots in India.
Biodiversity hotspots cover less than 2% of Earth's land area. Strict protection of these areas can reduce the rate of ongoing extinctions. Explain.
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.
Why does a patient of ADA-deficiency require repeated infusions of genetically engineered lymphocytes? Suggest a possible permanent remedy.
What is artificial insemination in ART? Under what conditions is the person medically advised to go for it?
Assertion (A): Some aquatic ecosystems have inverted biomass pyramids.
Reason (R): More energy is required by organisms occupying higher trophic levels.
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.
Assertion (A): Patents are granted by governments to an inventor.
Reason (R): Patents prevent others from commercial use of an invention.
Assertion (A): Plasmids are autonomously replicating circular extra-chromosomal DNA.
Reason (R): Plasmids are usually present in eukaryotic cells.