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biology paper 1
cell biology
sizes of cells
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Created by
Harvey Metcalfe
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Cards (22)
How do prokaryotic cells differ from eukaryotic cells?(size)
Prokaryotic cells are much smaller
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What is the standard unit of measurement in science?
The meter
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Why are objects in biology often measured in smaller units?
Because they are often much smaller than a
meter
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What does the prefix "centi" mean?
One hundredth
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How many centimeters are in a meter?
100
centimeters
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What is the standard form of 1 centimeter?
1 *
10^-2
meters
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What does the prefix "milli" mean?
One thousandth
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How many millimeters are in a centimeter?
10
millimeters
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What is the standard form of 1 millimeter?
1 *
10^-3
meters
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What does the prefix "micro" mean?
One millionth
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How many micrometers are in a meter?
1,000,000
micrometers
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What is the standard form of 1 micrometer?
1 *
10^-6
meters
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What is the typical size range of a human cell?
Around
10 to 20
micrometers
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Why is the micrometer a useful unit for biologists?
It is suitable for measuring
cell sizes
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What is the smallest unit discussed for measuring objects inside cells?
The
nanometer
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What does the prefix "nano" mean?
One billionth
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How many nanometers are in a meter?
1,000,000,000
nanometers
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What is the standard form of 1 nanometer?
1 *
10^-9
meters
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Why are proteins and cells measured in nanometers?
Because they are
very small sizes
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What are the key differences between eukaryotic and prokaryotic cells?
Eukaryotic cells are larger
Eukaryotic cells have a nucleus
Prokaryotic cells are smaller
Prokaryotic cells lack a nucleus
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What are the standard forms for the prefixes discussed?(Centimeter, millimeter, micrometer, nanometer)
Centimeter:
1
∗
1 *
1
∗
1
0
−
2
m
10^{-2} \text{ m}
1
0
−
2
m
Millimeter:
1
∗
1 *
1
∗
1
0
−
3
m
10^{-3} \text{ m}
1
0
−
3
m
Micrometer:
1
∗
1 *
1
∗
1
0
−
6
m
10^{-6} \text{ m}
1
0
−
6
m
Nanometer:
1
∗
1 *
1
∗
1
0
−
9
m
10^{-9} \text{ m}
1
0
−
9
m
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What are the implications of using different size units in biology?
Allows
precise
measurement of small structures
Facilitates understanding of
cellular
components
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