Biol 1201 Exam 1 (gregg)QUESTIONS &
ANSWERS 100% CORRECT!!
plasma membrane - ANSWERThe membrane at the boundary of every cell that acts
as a selective barrier, thereby regulating the cell's chemical composition.
Ribosomes - ANSWERcomplexes that make proteins; free in cytosol or bound to
rough ER or nuclear envelope
Golgi apparatus - ANSWERactive in synthesis, modification, sorting, and secretion of
cell products
Lysosome - ANSWERdigestive organelle where macromolecules are hydrolyzed,
and autophagy
Mitachondrion - ANSWERorganelle where cellular respiration occurs and most ATP
is generated
Cytoskeleton - ANSWERreinforces cell's shape; functions in cell movement;
components are made of protein. Includes: Microfilaments, Intermediate filaments,
Microtubules.
Endoplasmic Reticulum - ANSWERnetwork of membranous sacs and tubes; active
in membrane synthesis and other synthetic and metabolic processes; has rough
(ribosome-studded) and smooth regions
Rough ER - ANSWERprotein synthesis
Smooth ER - ANSWERlipid synthesis
calcium ion storage
poison detoxification
Nucleolus - ANSWERnonmembranous structure involved in production of ribosomes;
a nucleus has one or more nucleoli
Chromatin - ANSWERmaterial consisting of DNA and proteins; visible in a dividing
cell as individual condensed chromosomes
cell wall - ANSWERouter layer that maintains cell's shape and protects cell from
mechanical damage; made of cellulose, other polysaccharides, and protein
Chloroplast - ANSWERphotosynthetic organelle; converts energy of sunlight to
chemical energy stored in sugar molecules
central vacuole - ANSWERprominent organelle in older plant cells; storage,
breakdown of waste products, hydrolysis of macromolecules; enlargement of
vacuole major mechanism of plant growth.
, Part complete
The innermost electron shell of an atom can hold up to _____ electrons. -
ANSWER2
Which of these relationships is true of an uncharged atom? - ANSWERThe number
of protons is equal to the number of electrons
What determines the types of chemical reactions that an atom participates in? -
ANSWERthe number of electrons in the outermost electron shell
What type of bond is joining the two hydrogen atoms? - ANSWERcovalent
A(n) _____ refers to two or more atoms held together by covalent bonds. -
ANSWERmolecule
This atom can form up to _____ single covalent bond(s) - ANSWER4
A(n) _____ bond joins these two oxygen atoms. - ANSWERdouble covalent
Part complete
What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6
electrons? - ANSWER6
Part complete
Which of these refers to atoms with the same atomic number but different atomic
masses? - ANSWERthese atoms are isotopes
Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does
fluorine have? - ANSWER10
An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11.
How many protons does boron have? - ANSWER5
A water molecule can bond to up to _____ other water molecules by ____ bonds. -
ANSWER4 .... hydrogen
Part complete
The unequal sharing of electrons within a water molecule makes the water molecule
_____. - ANSWERpolar
organic phosphate - ANSWERcontributes negative charge
L-dopa is used to treat _____. - ANSWERParkinson's disease
What kind of effect does R-dopa have on Parkinson's disease? - ANSWERnone
structural isomers - ANSWERdiffer in the covalent arrangements of their atoms
ANSWERS 100% CORRECT!!
plasma membrane - ANSWERThe membrane at the boundary of every cell that acts
as a selective barrier, thereby regulating the cell's chemical composition.
Ribosomes - ANSWERcomplexes that make proteins; free in cytosol or bound to
rough ER or nuclear envelope
Golgi apparatus - ANSWERactive in synthesis, modification, sorting, and secretion of
cell products
Lysosome - ANSWERdigestive organelle where macromolecules are hydrolyzed,
and autophagy
Mitachondrion - ANSWERorganelle where cellular respiration occurs and most ATP
is generated
Cytoskeleton - ANSWERreinforces cell's shape; functions in cell movement;
components are made of protein. Includes: Microfilaments, Intermediate filaments,
Microtubules.
Endoplasmic Reticulum - ANSWERnetwork of membranous sacs and tubes; active
in membrane synthesis and other synthetic and metabolic processes; has rough
(ribosome-studded) and smooth regions
Rough ER - ANSWERprotein synthesis
Smooth ER - ANSWERlipid synthesis
calcium ion storage
poison detoxification
Nucleolus - ANSWERnonmembranous structure involved in production of ribosomes;
a nucleus has one or more nucleoli
Chromatin - ANSWERmaterial consisting of DNA and proteins; visible in a dividing
cell as individual condensed chromosomes
cell wall - ANSWERouter layer that maintains cell's shape and protects cell from
mechanical damage; made of cellulose, other polysaccharides, and protein
Chloroplast - ANSWERphotosynthetic organelle; converts energy of sunlight to
chemical energy stored in sugar molecules
central vacuole - ANSWERprominent organelle in older plant cells; storage,
breakdown of waste products, hydrolysis of macromolecules; enlargement of
vacuole major mechanism of plant growth.
, Part complete
The innermost electron shell of an atom can hold up to _____ electrons. -
ANSWER2
Which of these relationships is true of an uncharged atom? - ANSWERThe number
of protons is equal to the number of electrons
What determines the types of chemical reactions that an atom participates in? -
ANSWERthe number of electrons in the outermost electron shell
What type of bond is joining the two hydrogen atoms? - ANSWERcovalent
A(n) _____ refers to two or more atoms held together by covalent bonds. -
ANSWERmolecule
This atom can form up to _____ single covalent bond(s) - ANSWER4
A(n) _____ bond joins these two oxygen atoms. - ANSWERdouble covalent
Part complete
What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6
electrons? - ANSWER6
Part complete
Which of these refers to atoms with the same atomic number but different atomic
masses? - ANSWERthese atoms are isotopes
Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does
fluorine have? - ANSWER10
An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11.
How many protons does boron have? - ANSWER5
A water molecule can bond to up to _____ other water molecules by ____ bonds. -
ANSWER4 .... hydrogen
Part complete
The unequal sharing of electrons within a water molecule makes the water molecule
_____. - ANSWERpolar
organic phosphate - ANSWERcontributes negative charge
L-dopa is used to treat _____. - ANSWERParkinson's disease
What kind of effect does R-dopa have on Parkinson's disease? - ANSWERnone
structural isomers - ANSWERdiffer in the covalent arrangements of their atoms
