Human Health and Disease — BIOLOGY STD 12 Science — Question

If the Tropical rainforest would have been from the present 6% areas of earth to 12% areas how would the biodiversity be affected by it? Explain with reason.

(i) Assume that, GPP Forest A = GPP Forest B = GPP Forest C, If Forest A has NPP = 1254 J/m²/day; Forest B, NPP =2157 J/m²/day; and Forest C, NPP = 779 J/m²/day, which one of these forests has maximum energy loss by respiration? Give reason.
(ii) Draw an ecological pyramid of number of the following food chains
a. Grass-Animal-Fleas on the host animal
b. Tree - Insects - Woodpecker

Which species of Penicillium produces roquefort cheese?

Double fertilisation is reported in plants of both, castor and groundnut. However, the mature seeds of groundnut are non-albuminous and castor are albuminous. Explain the post fertilisation events that are responsible for it.

Explain what is meant by Bio - fortification.

Write the function of adenosine deaminase enzyme. State the cause of ADA deficiency in humans. Mention a possible permanent cure for an ADA deficiency patient.

A cross between a normal couple resulted in a son who was haemophilic and a normal daughter. In course of time, when the daughter was married to a normal man, to their surprise, the grandson was also haemophilic.
Represent this cross in the form of a pedigree chart. Give the genotypes of the daughter and her husband.

Describe the applications of biotechnology in medicine.

Restriction enzymes that are used in the construction of recombinant DNA are endonucleases which cut the DNA at ‘specific-recognition sequence’. What would be the disadvantage if they do not cut the DNA at specific-recognition sequence?

What is a terminator? What is its significance in transcription?