Nucleic acids are central to the very life process itself. Explain their role in living organisms. . 

How is heat lost from our body (explain diagrammatically)?

Describe he defects of vision and how are they corrected. Illustrate your answer with the help of a diagram

Fill in The Blanks  
a) Muscle fatigue during heavy exercise is caused by accumulation of …………………
b) Dietary carbohydrates ………………… and gluconeogenesis are the main sources of glucose in
blood.
c) The major constituent of gallstones is …………………
d) In pyogenic meningitis the level of ………………… decreases in CSF.
e) Rennin is ………………… hydrolyzing enzyme.
f) Insuffcient acid secretion in stomach is called …………………
g) Insulin and ………………… harmones have opposing action on blood glucose levels.
h) Use of anticoagulants is to be avoided while estimating ………………… levels in blood.
i) Proteins with many polypeptide chains are called ………………… proteins.
j) Deoxyribo nucleic acid (DNA) is ………………… stranded polynucleotide.

Difference between density and relative density.

The seat of the dentist’s chair is placed over the larger piston and the smaller piston is operated by a
foot pedal on the principle of:
i. Charles law
ii. Pascal’s law
iii. Boyle’s law
iv. Dalton’s law

Explain the difference between osmosis and dialysis.