Natural Science CLEP
Study online at https://quizlet.com/_2e6i2
1. cell smallest unit of most living things
2. organism living thing
3. prokaryotes cells that lack a membrane-bound nucleus and membrane-bound organelles
4. organelles small structures in the cytoplasm of a cell that do special jobs
5. eukoryotic cells has a nucleus, has organelles or other cell parts
6. virus particle made up of DNA, RNA, protein, and in some cases lipids that can only
replicate only by infecting living cells
7. electron micro- used to examine tiny cell organelles
scope
8. cell membrane composed of a bilayer of lipids embedded with globular proteins
9. endocytic vesicles Formed when cell membrane surrounds a molecule outside the cell and ingests
it
10. microvilli projections on cell membrane increase surface area
11. cytoskeleton provides structural support to a cell composed of microtubules, microfilaments,
centrioles
12. microtubules hollow tubes of protein about 25 nanometers in diameter, support the cell and
moves organelles within the cell
13. microfilaments double-stranded chains of proteins which give structure to the cell
14. centrioles tubes, One of two tiny structures located in the cytoplasm of animal cells near the
nuclear envelope; play a role in cell division.
15. ribosomes
1/7
, Natural Science CLEP
Study online at https://quizlet.com/_2e6i2
site of protein synthesis. Free ribosomes - float unattached; attached ribosomes
- attached to the ER
16. endoplasmic retic- an internal membrane system in which components of cell membrane and some
ulum proteins are constructed. rough - instrumental in protein synthesis; smooth -
processes lipids fats and steroids
17. golgi apparatus stores, packages and ships proteins
18. secretory vesicles packaged protein or other substance produced by golgi apparatus/endoplasmic
reticulum
19. exocytosis process by which a cell releases large amounts of material
20. lysosomes cell organelle filled with enyzmes need to break down certain materials in the cells
21. mitochondria Powerhouse of the cell, organelle that is the site of ATP (energy) production
22. cristae numerous folds in the inner membrane of a mitochondrion, the site of cellular
respiration
23. endosymbiont hy- Theory which suggests mitochondria and chloroplasts were once prokaryotic
pothesis organisms in a symbiotic relationship with eykorytic cells
24. nucleolus small, dense region within most nuclei in which the assembly of RNA proteins
begins
25. nuclear pores pores which allows materials to move in and out of the cell nucleus
26. cell wall strong layer around the cell membrane in plants, algae, and some bacteria made
of cellulose and lignin
27. stroma body of a chloroplast containing grana
28. grana disk-like plates which are the site of photosynthesis in chloroplasts
2/7
Study online at https://quizlet.com/_2e6i2
1. cell smallest unit of most living things
2. organism living thing
3. prokaryotes cells that lack a membrane-bound nucleus and membrane-bound organelles
4. organelles small structures in the cytoplasm of a cell that do special jobs
5. eukoryotic cells has a nucleus, has organelles or other cell parts
6. virus particle made up of DNA, RNA, protein, and in some cases lipids that can only
replicate only by infecting living cells
7. electron micro- used to examine tiny cell organelles
scope
8. cell membrane composed of a bilayer of lipids embedded with globular proteins
9. endocytic vesicles Formed when cell membrane surrounds a molecule outside the cell and ingests
it
10. microvilli projections on cell membrane increase surface area
11. cytoskeleton provides structural support to a cell composed of microtubules, microfilaments,
centrioles
12. microtubules hollow tubes of protein about 25 nanometers in diameter, support the cell and
moves organelles within the cell
13. microfilaments double-stranded chains of proteins which give structure to the cell
14. centrioles tubes, One of two tiny structures located in the cytoplasm of animal cells near the
nuclear envelope; play a role in cell division.
15. ribosomes
1/7
, Natural Science CLEP
Study online at https://quizlet.com/_2e6i2
site of protein synthesis. Free ribosomes - float unattached; attached ribosomes
- attached to the ER
16. endoplasmic retic- an internal membrane system in which components of cell membrane and some
ulum proteins are constructed. rough - instrumental in protein synthesis; smooth -
processes lipids fats and steroids
17. golgi apparatus stores, packages and ships proteins
18. secretory vesicles packaged protein or other substance produced by golgi apparatus/endoplasmic
reticulum
19. exocytosis process by which a cell releases large amounts of material
20. lysosomes cell organelle filled with enyzmes need to break down certain materials in the cells
21. mitochondria Powerhouse of the cell, organelle that is the site of ATP (energy) production
22. cristae numerous folds in the inner membrane of a mitochondrion, the site of cellular
respiration
23. endosymbiont hy- Theory which suggests mitochondria and chloroplasts were once prokaryotic
pothesis organisms in a symbiotic relationship with eykorytic cells
24. nucleolus small, dense region within most nuclei in which the assembly of RNA proteins
begins
25. nuclear pores pores which allows materials to move in and out of the cell nucleus
26. cell wall strong layer around the cell membrane in plants, algae, and some bacteria made
of cellulose and lignin
27. stroma body of a chloroplast containing grana
28. grana disk-like plates which are the site of photosynthesis in chloroplasts
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