PCB 3023 - CELL BIOLOGY EXAM 1 REVIEW
QUESTIONS AND VERIFIED ANSWERS
(T/F) A protein adopts a conformation that minimizes the free
energy of the system - correct answer- true
(T/F) A side chain labeled as nonpolar implies that it cannot form
hydrogen bonds - correct answer- false; it only means
that the hydrogen bonds it forms are weak
(T/F) A water molecule contains two hydrogen bonds -
correct answer- false; it normally ranges from 2.4 to 3.6
(T/F) All protein interactions are stabilized by wan der Wall
interactions - correct answer- true
(T/F) Bonds strengths are identical in vacuum and in water -
correct answer- false
(T/F) Cholesterol is an example of a fatty acid - correct
answer- false; an example of an steroid
,(T/F) Covalent bonds be non-polar as well as polar - correct
answer- true
(T/F) Entropy means disorder - correct answer- false; it
can only be visualized in terms of disorder
(T/F) Fatty acids are amphiphilic - correct answer- true
(T/F) Fatty acids' hydrocarbon tails can comprise of multiple
double bonds - correct answer- true
(T/F) Ribose and deoxyribose are hexose sugars - correct
answer- false; they are pentose
(T/F) Under physiological conditions, covalent bonds can be used
to keep molecules together - correct answer- true
(T/F) While covalent bonds can be polar and non-polar, ionic
bonds are always polar - correct answer- true
, 4 major families of small organic molecules - correct
answer- 1. sugars
2. fatty acids
3. amino acids
4. nucleotides
4 major macromolecules - correct answer- 1.
polysaccharides, glycogen, and starch (from sugars)
2. fats and membranes lipids (from fatty acids)
3. proteins (from amino acids)
4. nucleic acids (from nucleotides)
A nucleotide consists of - correct answer- 1. nitrogen-
containing base
2. a five-carbon sugar
3. one or more phosphate groups
Acids decrease pH by - correct answer- increasing the
level of H+
QUESTIONS AND VERIFIED ANSWERS
(T/F) A protein adopts a conformation that minimizes the free
energy of the system - correct answer- true
(T/F) A side chain labeled as nonpolar implies that it cannot form
hydrogen bonds - correct answer- false; it only means
that the hydrogen bonds it forms are weak
(T/F) A water molecule contains two hydrogen bonds -
correct answer- false; it normally ranges from 2.4 to 3.6
(T/F) All protein interactions are stabilized by wan der Wall
interactions - correct answer- true
(T/F) Bonds strengths are identical in vacuum and in water -
correct answer- false
(T/F) Cholesterol is an example of a fatty acid - correct
answer- false; an example of an steroid
,(T/F) Covalent bonds be non-polar as well as polar - correct
answer- true
(T/F) Entropy means disorder - correct answer- false; it
can only be visualized in terms of disorder
(T/F) Fatty acids are amphiphilic - correct answer- true
(T/F) Fatty acids' hydrocarbon tails can comprise of multiple
double bonds - correct answer- true
(T/F) Ribose and deoxyribose are hexose sugars - correct
answer- false; they are pentose
(T/F) Under physiological conditions, covalent bonds can be used
to keep molecules together - correct answer- true
(T/F) While covalent bonds can be polar and non-polar, ionic
bonds are always polar - correct answer- true
, 4 major families of small organic molecules - correct
answer- 1. sugars
2. fatty acids
3. amino acids
4. nucleotides
4 major macromolecules - correct answer- 1.
polysaccharides, glycogen, and starch (from sugars)
2. fats and membranes lipids (from fatty acids)
3. proteins (from amino acids)
4. nucleic acids (from nucleotides)
A nucleotide consists of - correct answer- 1. nitrogen-
containing base
2. a five-carbon sugar
3. one or more phosphate groups
Acids decrease pH by - correct answer- increasing the
level of H+
