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Questions and Answers
What is the approximate size of a bacterial cell?
What is the approximate size of a bacterial cell?
- 10-20 nanometers in diameter
- 0.1 nanometers in diameter
- 10-20 micrometers in diameter
- A few micrometers in diameter (correct)
What is the size of an angstrom (Å) in nanometers?
What is the size of an angstrom (Å) in nanometers?
- 1 nanometer
- 10 nanometers
- 100 nanometers
- 0.1 nanometers (correct)
What is the size of a hydrogen atom in angstroms (Å)?
What is the size of a hydrogen atom in angstroms (Å)?
- About 100 Å
- About 1000 Å
- About 10 Å
- About 1 Å (correct)
What unit is used for molecules and subcellular structures too small to be seen in a light microscope?
What unit is used for molecules and subcellular structures too small to be seen in a light microscope?
How does the size of organelles compare to bacterial cells?
How does the size of organelles compare to bacterial cells?
True or false: Bacterial cells are larger than cells of plants and animals.
True or false: Bacterial cells are larger than cells of plants and animals.
True or false: Organelles are comparable in size to bacterial cells.
True or false: Organelles are comparable in size to bacterial cells.
True or false: The nanometer is one-thousandth of a meter.
True or false: The nanometer is one-thousandth of a meter.
True or false: The angstrom (Å) is equal to 10-10 meters.
True or false: The angstrom (Å) is equal to 10-10 meters.
True or false: The angstrom (Å) is half the size of a hydrogen atom.
True or false: The angstrom (Å) is half the size of a hydrogen atom.
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Study Notes
The Emergence of Modern Cell Biology
- Modern cell biology is comprised of three strands of biological inquiry: cytology, biochemistry, and genetics.
- Cytology focuses on cellular structure and emphasizes optical techniques.
- Biochemistry focuses on cellular chemical structure and function.
- Genetics focuses on information flow and heredity, and includes sequencing of the entire genome in numerous organisms.
Cellular Dimensions
- The units used to measure cells and organelles may not be familiar.
- The micrometer (m) is one millionth of a meter (10-6 m).
- The micrometer is also called the micron.
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