1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Which of the following statements regarding cilia is not correct ?
A
Microtubules of cilia are composed of tubulin
B
The organized beating of cilia is controlled by fluxes of Ca2+ across the membrane
C
Cilia are hair-like cellular appendages
D
Cilin contain an outer ring of nine doublet microtubules surrounding two single microtubules
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
A major breakthrough in the studies of cells came with the development of electron microscope. This is because
A
Electron beam can pass through thick materials, whereas light microscopy requires thin sections
B
The resolution power of the electron microscope is much higher than that of the light microscope
C
The electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons
D
The resolving power of the electron microscope is 200-350 nm as compared to 0.1-0.2 nm for the light microscope
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
One turn of the helix in a B-form DNA is approximately -
A
20 nm
B
3.4 nm
C
2 nm
D
0.34 nm
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
The formula for exponential population growth is-
A
dN/dt = rN
B
dt/dN = rN
C
rN/dN = dt
D
dN/rN = dt
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