List of practice Questions

Draw the structures of major monohalo products in each of the following reactions: 
structures of major monohalo products

(b) Give reasons for the following:
(i) Grignard reagent should be prepared under anhydrous conditions.
(ii) Alkyl halides give alcohol with aqueous KOH whereas in the presence of alcoholic KOH, alkenes are formed
A convex lens of focal length 40 cm forms an image of an extended source of light on a photo-electric cell. A current \( I \) is produced. The lens is replaced by another convex lens having the same diameter but focal length 20 cm. The photoelectric current now is:
Define ecosystem. Describe its biotic and abiotic components with diagrams.
Describe different Assisted Reproductive Technologies.
Explain the salient features of the Human Genome.
What is mutualism? Explain it with a suitable example.
Describe the role of microbes in biogas production.
Draw a labelled diagram of a sectional view of the female ovary.
Write a note on linkage.
Describe emasculation.
Write a note on Hardy-Weinberg principle.
Draw a neat labelled diagram of a dicotyledonous embryo.
Describe the role of animals in pollination.
How do biofertilizers increase the fertility of the soil?
What is incomplete dominance? Explain with examples.
Write the name of any one disease caused by mosquitoes and describe its control measures.
Write the names of four nucleotide units of DNA.
Which enzyme breaks the DNA molecule?
Name any two biodiversity hot spots.
Describe Mendelian disorder in detail.
Explain DNA fingerprinting and its uses.
Write a note on Australopithecines.
Describe in detail how microbes can be used to decrease the use of chemical fertilizers and pesticides.
Describe the food chain with a diagram.
What do you mean by the Central Dogma of Molecular Biology?