Exam (elaborations)
BCMB 401 Exam 1 with verified solutions
- Course
- BCMB 401
- Institution
- South University
BCMB 401 Exam 1 with verified solutions
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BCMB 401 Exam 1When pKa is equal to pH, the amount of acid is _____ to the amount base - correct answer ✔✔equal
When pH is greater than pKa - correct answer ✔✔deprotonated, more base present
At pH 7.4, the predominant form of this molecule could participate in - correct answer ✔✔both hydrogen bonding and ionic interactions
When pH is less than pKa - correct answer ✔✔protonated, more acid present
At physiological pH (7.0-7.5) the amino group attached to the alpha-carbon will predominately be in the ____ form - correct answer ✔✔protonated (NH3+)
The only achrial amino acid, this a.a. is more often found on the exterior of proteins even though is it nonpolar - correct answer ✔✔Glycine
The amino acid with an R-group that could form a favorable ionic interaction with the R-group of aspartate is - correct answer ✔✔Arginine (opposing charges)
pH at which the net charge of a molecule is 0 - correct answer ✔✔Isoelectric point (pI)
A peptide bond is essentially planar due to - correct answer ✔✔resonance which gives it partial double bond character
Leu-enkephalin is a signaling peptide involved in the - correct answer ✔✔response to extreme pain
You can distinguish between parallel vs. anti-parallel beta sheets by - correct answer ✔✔the hydrogen bonding pattern between beta strands Which secondary structure would cover a longer distance, a ten residue alpha-helix or ten residue beta-
strand? - correct answer ✔✔Beta
Which of the following sequences would most likely be found in a loop? - correct answer ✔✔DGSSPG
Wet hair tends to be straighter because water ____ hydrogen bonds within a helix in a coiled coil and between coiled coils in a hair fiber - correct answer ✔✔weakens
Molten globule formation is driven by - correct answer ✔✔hydrophobic effect
In the process of protein folding, an ionic interaction between residues 3 A apart in space involving an arginine at position 64 and a glutamate at position 223 in the primary sequence would be considered a - correct answer ✔✔long range interaction
Hydrophobic R groups face the _____ of a protein while hydrophilic proteins face the ____ of a protein - correct answer ✔✔inside, outside
The protein, leghemoglobin, is found in - correct answer ✔✔vegetarian and vegan meat products
The secondary structures associated with plaques formed in Alzheimer's and Prion Diseases are - correct answer ✔✔Beta-sheet
Hydrogen bonding in liquid water is most accurately described as a - correct answer ✔✔dynamic, fluctuating lattice with hydrogen bonds being formed and broken on the picosecond and nanosecond timescsale
The boiling point of pure hexane is much higher than the boiling point of pure ethane due to the increased amount of ____ between hexane molecules - correct answer ✔✔van der Waals interactions
How are polarity and dielectric constant related? - correct answer ✔✔directly proportional
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