BIO 1201 EXAM 1 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS
VERIFIED 2027 EDITION
1. light microscope
visible light is passed through a specimen and then through glass lenses
2. Magnification
the ratio of an object's image to its real size
3. Resolution
the measure of the clarity of the image, or the minimum distance of two distinguishable points
4. Contrast
visible differences in brightness between parts of the sample, low contrast is less bc more darkness
5. Organelles
the membrane-enclosed structures in eukaryotic cells
6. Electron microscopes (EM)
two basic types of EM are used to study subcellular structures
7. Scanning electron microscope (SEM)
focus a beam of electrons onto the surface of a specimen, providing images that look 3-D
8. Transmission electron microscope (TEM)
focus a beam of electrons through a specimen
9. Cell fractionation
takes cells apart and separates the major organelles from one another to study them on their own
10. Basic features of all cells
- Plasma membrane - semifluid substance called cytosol - chromosomes (carry genes) - ribosomes (make
proteins)
11. Cytosol
semifluid substance
12. Prokaryotic cells
- no nucleus - nucleoid - no membrane-bound organelles - cytoplasm
13. Nucleoid
DNA in an unbound region
14. Cytoplasm
bound by the plasma membrane
15. Prokaryotic cell
1
, 16. Eukaryotic cells
DNA in a nucleus bounded by a double membrane membrane-bound organelles cytoplasm
17. Plasma membrane
a selective barrier that allows sufficient passage of oxygen, nutrients, and waste to service the volume of
every cell; lets certain things in and out
18. Plasma membrane
19. Eukaryotic cells
20. Nucleus
contains most of the cell's genes and is usually the most conspicuous organelle
21. nuclear envelope
encloses the nucleus, separating it from the cytoplasm
2
VERIFIED 2027 EDITION
1. light microscope
visible light is passed through a specimen and then through glass lenses
2. Magnification
the ratio of an object's image to its real size
3. Resolution
the measure of the clarity of the image, or the minimum distance of two distinguishable points
4. Contrast
visible differences in brightness between parts of the sample, low contrast is less bc more darkness
5. Organelles
the membrane-enclosed structures in eukaryotic cells
6. Electron microscopes (EM)
two basic types of EM are used to study subcellular structures
7. Scanning electron microscope (SEM)
focus a beam of electrons onto the surface of a specimen, providing images that look 3-D
8. Transmission electron microscope (TEM)
focus a beam of electrons through a specimen
9. Cell fractionation
takes cells apart and separates the major organelles from one another to study them on their own
10. Basic features of all cells
- Plasma membrane - semifluid substance called cytosol - chromosomes (carry genes) - ribosomes (make
proteins)
11. Cytosol
semifluid substance
12. Prokaryotic cells
- no nucleus - nucleoid - no membrane-bound organelles - cytoplasm
13. Nucleoid
DNA in an unbound region
14. Cytoplasm
bound by the plasma membrane
15. Prokaryotic cell
1
, 16. Eukaryotic cells
DNA in a nucleus bounded by a double membrane membrane-bound organelles cytoplasm
17. Plasma membrane
a selective barrier that allows sufficient passage of oxygen, nutrients, and waste to service the volume of
every cell; lets certain things in and out
18. Plasma membrane
19. Eukaryotic cells
20. Nucleus
contains most of the cell's genes and is usually the most conspicuous organelle
21. nuclear envelope
encloses the nucleus, separating it from the cytoplasm
2
