LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & ADV. ZOOLOGY
THIRD SEMESTER – NOVEMBER 2010
PH 3204 – PHYSICS FOR BIOLOGY
Date : 12-11-10 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART-A
Answer all questions (10 x 2 = 20)
- State the significance of Reynold’s number of a liquid.
- What are cofactors? Name any one.
- Define the resolving power of a microscope.
- Find the nuclear radius of a Ho165
- What are transducers?
- Define ‘range’ and ‘stopping potential’ of an alpha particle.
- Define intensity of sound.
- State the laws of refraction of light.
- Differentiate between diffusion and osmosis.
- What are coupled reactions?
PART-B
Answer any four questions (4×7.5=30)
- Write a note on photosystems I and II.
- Explain in detail, how Oswald viscometer is used to compare the viscosities of two liquids.
- Give a detailed account of temperature transducer.
- Derive the expression for angular magnification for a compound microscope
- Calculate the binding energy of an α- particle and express the result both in MeV and joules. (mass of α- particle =4.001506 amu, mass of proton = 1.007276 amu , mass of neutron = 1.008665 amu )
PART-C
Answer any four questions (4×12.5=50)
- Explain with a neat diagram the process of glycolysis with all the intermediate steps.
- Derive Poiseuille’s formula for the flow of liquid through a capillary tube.
- Explain with a neat circuit diagram, the working of, (i) a magnetostriction oscillator and
(ii) Galton whistle. - (i) Give a detailed account of Pressure transducer .
(ii) State the laws of osmotic pressure
- (i) Explain alpha ray spectrum. Give any four properties of alpha rays.
(ii) Discuss the theory of beta decay.
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