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Biology 11, Chapter 1
Cell Structure And Functions - 2
1.
To homogenize cells the suitable medium must have?
a) Correct pH, composition and temperature
b) Correct pH, ionic composition and heat
c) Correct pH, ionic composition and temperature
d) Correct pH, bionic composition and temperature
2.
Homogenization of cells can be done with a __________ (food mixer). The mixture is then______?
a) Homogenizer, cooled
b) Homogenizer, centrifuged
c) Centric, Homogenizer
d) Centrifuge, Homogenizer
3.
Centrifugation is the process to separate substances on the basis of their?
a) Densities
b) Shape
c) Weight
d) Volume
4.
Centrifugation is done by the machine called?
a) Centric
b) Centrifuge
c) Homogenizer
d) Spinner
5.
In a centrifuge contents are kept in ____ that are much like the________?
a) Tubes, test tubes
b) test tubes, Tubes
c) Centrifuge, test tubes
d) Tubes, Centrifuge
6.
Spinning the tubes in a centrifuge exerts a __________ force on the contents?
a) Centrifugal
b) Strong
c) Huge
d) Centripetal
7.
As the number of revolutions per minute increases, so does the?
a) Centrifugal force
b) Two answers are correct
c) Centripetal force
d) Gravitational Force
8.
Centrifugal force is measured as G, which is equal to the?
a) Gravity
b) Force of gravity
c) Force of deceleration
d) Force of acceleration
9.
Most biological structures are?
a) Identical
b) Black
c) Red
d) Transparent
10.
An auxiliary technique used in microscopy to enhance colour contrast in the microscopic image is called?
a) Unifying
b) According
c) Staining
d) Contrasting
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