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Biology 11, Chapter 1
Cell Structure And Functions - 10
1.
In Ocular micrometre a scale showing___________________ , have been photographically produced, cemented between two glasses?
a) 100 arbitrary divisions
b) 1000 arbitrary divisions
c) 20 arbitrary divisions
d) 10 arbitrary divisions
2.
What is meant by the word ocular?
a) All answers are correct
b) Relating to the eye
c) Resembling the eye in form or function
d) Relating to the sense of sight
2.
What is meant by the word ocular?
a) All answers are correct
b) Relating to the eye
c) Resembling the eye in form or function
d) Relating to the sense of sight
4.
The micrometre acts as _____ and its ______ is used for direct measurement of the object?
a) Machine, ruler
b) Ruler, scale
c) Machine, scale
d) Device, scale
5.
Why Stage Micrometre has been named as such?
a) it is put between the two lenses of the ocular
b) No answer is correct
c) It is used on a stage
d) Its scale is placed on the stage of the microscope
6.
Above figure represents (Fig 1.7)?
a) Stage Micrometre
b) Ocular Micrometre
c) Simple Micrometre
d) Eyepiece micrometre
7.
What is a millimetre?
a) Equal to 1,000 micrometres
b) Equal to one thousandth of a metre
c) Two answers are correct
d) Equal to 1x10^-3 metre
8.
What is a nanometre?
a) Equal to one billionth of a metre
b) Equal to 1x10^-9 m
c) Equal to 1/1,000,000,000 Meter
d) Equal to one thousand-millionth of a metre
e) All answers are correct
9.
The Unit of length equal to one hundred-millionth of a centimetre or 10^-10 metre, is called?
a) Micrometre
b) Nanometre
c) Angstroms
d) Millimetre
10.
The Unit of length equal to one hundred-millionth of a centimetre or 10^-10 metre, is used mainly to measure?
a) Two answers are correct
b) Angstroms
c) Wavelengths
d) Inter-atomic distances
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