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Biology 11, Chapter 1
Cell Structure And Functions - 6
1.
For electrophoresis the gel is sandwiched between glass or plastic plates to form a viscous slab. The two ends of the slabs are suspended in two salt solutions that are connected by electrodes to a power source. When voltage is applied to the apparatus, the molecules present in the gel migrate through the electric field according to their individual charge and they?
a) Move away from one another in the magnetic field
b) Move away from one another in the gel
c) Two answers are correct
d) Move towards each other in the gel
2.
For electrophoresis when voltage is applied to the apparatus, The negative charged molecule will move towards the ________ and the molecule having positive upper charge will move towards the_______________?
a) Negative pole, buffer solution negative pole
b) Positive pole, buffer solution positive pole
c) Two answers are correct
d) Positive pole, buffer solution negative pole
3.
When the negative charged molecules and positive charged molecules have been separated, how these are pinpointed?
a) By electric and magnetic field
b) By buffer solution
c) By magnetic field
d) By electrode staining the gel
4.
A spectrophotometer (fig. 1.4) is an instrument that measures the amount of light that passes through the sample and from this it can be calculated that?
a) Two answers are correct
b) How much light passed through
c) How much light was reflected
d) How much light was absorbed
5.
Which figure is shown in the above picture (fig. 1.4)?
a) No answer is correct
b) Spectrophotometer
c) Electrophoresis
d) Ammeter
6.
A spectrophotometer is an instrument that measures the amount of light that passes through the sample and from this it can be calculated how much light was?
a) passed through
b) Reflected
c) Absorbed
d) Refracted
7.
Which figure is shown in the above picture (fig. 1.6)?
a) Eyepiece micrometre
b) Ocular micrometre
c) Two answers are correct
d) Spectrophotometer
8.
In spectrophotometer the amount of light absorbed at each wavelength is plotted in a graph and the result is what we call the absorption spectrum. The procedure is called?
a) Anthropometry
b) Astrometry
c) Audiometry
d) Spectrophotometry
9.
The process used by plants and other organisms to convert light energy, normally from the sun, into chemical energy that can be used to fuel the organisms' activities is?
a) Electrosynthesis
b) Two answers are correct
c) Photosynthesis
d) Chemosynthesis
10.
Spectrophotometry can be used to determine the ________ of light that take part in photosynthesis?
a) Speed
b) Wavelengths
c) Strength
d) colour
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