BIOL 1201 EXAM 1 (GREGG) UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
Question:
1. plasma membrane
Answer:
The membrane at the boundary of every cell that acts as a selective barrier,
thereby regulating the cell's chemical composition.
Question:
2. Ribosomes
Answer:
complexes that make proteins; free in cytosol or bound to rough ER or nuclear
envelope
Question:
3. Golgi apparatus
Answer:
active in synthesis, modification, sorting, and secretion of cell products
Question:
4. Lysosome
Answer:
digestive organelle where macromolecules are hydrolyzed, and autophagy
Question:
5. Mitachondrion
Answer:
organelle where cellular respiration occurs and most ATP is generated
Question:
6. Cytoskeleton
Answer:
reinforces cell's shape; functions in cell movement; components are made of
protein. Includes: Microfilaments, Intermediate filaments, Microtubules.
,Question:
7. Endoplasmic Reticulum
Answer:
network of membranous sacs and tubes; active in membrane synthesis and other
synthetic and metabolic processes; has rough (ribosome-studded) and smooth
regions
Question:
8. Rough ER
Answer:
protein synthesis
Question:
9. Smooth ER
Answer:
lipid synthesis
calcium ion storage
poison detoxification
Question:
10. Nucleolus
Answer:
nonmembranous structure involved in production of ribosomes; a nucleus has
one or more nucleoli
Question:
11. Chromatin
Answer:
material consisting of DNA and proteins; visible in a dividing cell as individual
condensed chromosomes
Question:
12. cell wall
Answer:
outer layer that maintains cell's shape and protects cell from mechanical damage;
made of cellulose, other polysaccharides, and protein
Question:
13. Chloroplast
Answer:
photosynthetic organelle; converts energy of sunlight to chemical energy stored
in sugar molecules
, Question:
14. central vacuole
Answer:
prominent organelle in older plant cells; storage, breakdown of waste products,
hydrolysis of macromolecules; enlargement of vacuole major mechanism of plant
growth.
Question:
15. Part complete
The innermost electron shell of an atom can hold up to
_____ electrons.
Answer:
2
Question:
16. Which of these relationships is true of an uncharged
atom?
Answer:
The number of protons is equal to the number of electrons
Question:
17. What determines the types of chemical reactions that an
atom participates in?
Answer:
the number of electrons in the outermost electron shell
Question:
18. What type of bond is joining the two hydrogen atoms?
Answer:
covalent
Question:
19. A(n) _____ refers to two or more atoms held together by
covalent bonds.
Answer:
molecule
QUESTIONS AND CORRECT ANSWERS
Question:
1. plasma membrane
Answer:
The membrane at the boundary of every cell that acts as a selective barrier,
thereby regulating the cell's chemical composition.
Question:
2. Ribosomes
Answer:
complexes that make proteins; free in cytosol or bound to rough ER or nuclear
envelope
Question:
3. Golgi apparatus
Answer:
active in synthesis, modification, sorting, and secretion of cell products
Question:
4. Lysosome
Answer:
digestive organelle where macromolecules are hydrolyzed, and autophagy
Question:
5. Mitachondrion
Answer:
organelle where cellular respiration occurs and most ATP is generated
Question:
6. Cytoskeleton
Answer:
reinforces cell's shape; functions in cell movement; components are made of
protein. Includes: Microfilaments, Intermediate filaments, Microtubules.
,Question:
7. Endoplasmic Reticulum
Answer:
network of membranous sacs and tubes; active in membrane synthesis and other
synthetic and metabolic processes; has rough (ribosome-studded) and smooth
regions
Question:
8. Rough ER
Answer:
protein synthesis
Question:
9. Smooth ER
Answer:
lipid synthesis
calcium ion storage
poison detoxification
Question:
10. Nucleolus
Answer:
nonmembranous structure involved in production of ribosomes; a nucleus has
one or more nucleoli
Question:
11. Chromatin
Answer:
material consisting of DNA and proteins; visible in a dividing cell as individual
condensed chromosomes
Question:
12. cell wall
Answer:
outer layer that maintains cell's shape and protects cell from mechanical damage;
made of cellulose, other polysaccharides, and protein
Question:
13. Chloroplast
Answer:
photosynthetic organelle; converts energy of sunlight to chemical energy stored
in sugar molecules
, Question:
14. central vacuole
Answer:
prominent organelle in older plant cells; storage, breakdown of waste products,
hydrolysis of macromolecules; enlargement of vacuole major mechanism of plant
growth.
Question:
15. Part complete
The innermost electron shell of an atom can hold up to
_____ electrons.
Answer:
2
Question:
16. Which of these relationships is true of an uncharged
atom?
Answer:
The number of protons is equal to the number of electrons
Question:
17. What determines the types of chemical reactions that an
atom participates in?
Answer:
the number of electrons in the outermost electron shell
Question:
18. What type of bond is joining the two hydrogen atoms?
Answer:
covalent
Question:
19. A(n) _____ refers to two or more atoms held together by
covalent bonds.
Answer:
molecule
