Gene with multiple effect.
Category: Content
Life processes. Q bank
Fill in the blanks: ————— is a fluid connective tissue. ———— is the filtration unit of kidney. An example of anaerobic respiration is ————- Read More …
Describe in detail the structure of DNA polynucleotide chain.
A nucleotide has three components – a nitrogenous base, a pentose sugar deoxyribose , and a phosphate group. There are two types of nitrogenous Read More …
Discuss the origin and evolution of Man.
Name 1st appeared characteristics Brain capacity place diet Dryopithecus & Ramapithecus 15 million years ago (MYA) Hairy, Ape like gait Ramapithecus more Read More …
Describe the role of Restriction enzymes in Biotechnology?
Restriction enzymes cut DNA molecules at a particular point by recognising a specific sequence . They are of two kinds – Exonucleases – remove Read More …
Name two core techniques that helped develop biotechnology.
i) Genetic engineering : Techniques to alter the chemistry of genetic material & to introduce these into host organisms and thus change the phenotype of Read More …
Explain surgical methods and IUD’s are used in controlling human population.
Surgical method or sterilisation is a terminal method to prevent any more pregnancies. Surgical intervention blocks gamete transfer so as to prevent conception. In males it is called ‘vasectomy’, Read More …
Describe Biomagnification of DDT in an aquatic food chain.
Biomagnification refers to increase in concentration of the toxicant at successive trophic levels due to accumulation of a toxic substance by an organism. The toxic Read More …
Give an account if Jhum cultivation as a cause of deforestation.
The farmers in north-eastern states of India follow slash and burn agriculture / Jhum cultivation. They cut down the trees of the forest and Read More …
Mention the advantages of CNG over petrol / diesel in controlling vehicular pollution.
CNG burns most efficiently, so less air pollution. unlike petrol or diesel, very little of it is left unburnt. CNG is cheaper than petrol or Read More …