BMSC-200 USASK CORRECT 100%
Which category of biomolecules involves aggregates rather than polymers? -
ANSWERLipids
Which of these weak acids is the strongest acid? -
ANSWERCOOH-CH2-+NH3/COO--CH2-+NH3 pKa = 2.34
The lower the pKa, the ____ the acid - ANSWERstronger
When there is a 10-fold excess of the protonated (HA) versus the conjugate base
(A-) forms of a weak acid, the pH is - ANSWER1 below the pka of the weak acid
A weak acid solution of pH 6.2 has 1,000-fold excess of the acid form (HA) relative to
the conjugate base (A-) form of a weak acid. What is the pKa of that weak acid? -
ANSWER9.2
Geometric isomers emerge as a consequence of: - ANSWERdouble bonds
All known forms of life: - ANSWERare carbon-based.
Which category of biomolecules includes both linear and branched polymers? -
ANSWERCarbohydrates
Which of these biomolecules is composed from amino acid building blocks? -
ANSWERProteins
What is the functional order of utilization of biomolecules according to the Central
Dogma of Biochemistry? - ANSWERDNA-RNA-protein
What is the buffering range of a weak acid with a pKa of 5.2? - ANSWER4.2 to 6.2
Which statement(s) about pH is FALSE? - ANSWER-A 100-fold increase in [H+]
reflects a decrease of 2 pH units.
-In water, the product of [H+][OH-] always equals a constant number
- In aqueous solutions, [H+] is always equal to 10-7 M.
Molecules with both polar and non-polar groups are called - ANSWERAmphipathic
Elements of secondary structure: - ANSWER-have phi and psi angles within the
allowed regions of a Ramachandran plot.
-optimize main-chain hydrogen bonding potential
-have conserved structural features independent of the specific protein in which they
are contained.
-include alpha helicies and beta sheets.
Which category of biomolecules involves aggregates rather than polymers? -
ANSWERLipids
Which of these weak acids is the strongest acid? -
ANSWERCOOH-CH2-+NH3/COO--CH2-+NH3 pKa = 2.34
The lower the pKa, the ____ the acid - ANSWERstronger
When there is a 10-fold excess of the protonated (HA) versus the conjugate base
(A-) forms of a weak acid, the pH is - ANSWER1 below the pka of the weak acid
A weak acid solution of pH 6.2 has 1,000-fold excess of the acid form (HA) relative to
the conjugate base (A-) form of a weak acid. What is the pKa of that weak acid? -
ANSWER9.2
Geometric isomers emerge as a consequence of: - ANSWERdouble bonds
All known forms of life: - ANSWERare carbon-based.
Which category of biomolecules includes both linear and branched polymers? -
ANSWERCarbohydrates
Which of these biomolecules is composed from amino acid building blocks? -
ANSWERProteins
What is the functional order of utilization of biomolecules according to the Central
Dogma of Biochemistry? - ANSWERDNA-RNA-protein
What is the buffering range of a weak acid with a pKa of 5.2? - ANSWER4.2 to 6.2
Which statement(s) about pH is FALSE? - ANSWER-A 100-fold increase in [H+]
reflects a decrease of 2 pH units.
-In water, the product of [H+][OH-] always equals a constant number
- In aqueous solutions, [H+] is always equal to 10-7 M.
Molecules with both polar and non-polar groups are called - ANSWERAmphipathic
Elements of secondary structure: - ANSWER-have phi and psi angles within the
allowed regions of a Ramachandran plot.
-optimize main-chain hydrogen bonding potential
-have conserved structural features independent of the specific protein in which they
are contained.
-include alpha helicies and beta sheets.
