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BCH 361 IClicker Questions Study Questions with 100% Correct Verified Solutions| Latest Update
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BCH 361 IClicker Questions StudyQuestions with 100% Correct
Verified Solutions| Latest Update
Which of the following types of atoms is abundant in human, sea water, and earth
crust?
A. Hydrogen
B. Oxygen
C. Carbon
D. Nitrogen - Answer B. Oxygen
Which of the following is not a major type of bio molecules in human?
A. Carbohydrates
B. Fats
C. Nucleic Acids
D. Vitamins - Answer D. Vitamins
Which of the following cannot serve as a H-bond donor?
A. -NH3+
B. -OH
C. >C=O
D. >N-H - Answer C. >C=O
,Hexane (apolar) and water (polar) do not mix. If phospholipids are added to a bi-phasic
solution of water/hexane, where would they end up?
A. Phospholipids will be in hexane only.
B. Phospholipids will be in water only.
C. Phospholipid head groups will be in hexane and lipid tails will be in water.
D. Phospholipid head groups will be in water and lipid tails will be in hexane. - Answer D.
Phospholipid head groups will be in water and lipid tails will be in hexane.
Which weak bonding interactions does not require attractive Coulombic forces
between the bonded molecules?
A. Hydrogen bonds
B. Electrostatic interactions
C. Van der Waals interactions
D. Hydrophobic interactions - Answer D. Hydrophobic interactions
What kind of weak interactions can the two compounds (Adenine and Guanine)
have with each other?
A. Hydrogen bonding interactions
B. Electrostatic interactions
C. Van der Waals interactions
D. Hydrophobic interactions - Answer A. Hydrogen bonding interactions
The amino acid arginine has a guanidine functional group (see picture). Do you
think guanidine is an acid or a base?
, A. Acid
B. Base
C. Neither - Answer B. Base
What is the charge on the conjugate acid form of amine?
A. Positive
B. Negative
C. Neutral
D. It can be either - Answer A. Positive
Estimate the molar concentration of water in pure water from the acid dissociation
constant of water (10^-16 M) and the fact that [H+]=[OH-]=10^-7 M.
A.1M
B.10M
C. 100 M
D. 1000 M - Answer A. 1 M
Guanidine can adopt both base form and conjugateacid form. The pKa of side
chain guanidine is 12.5.Which form is guanidine in at pH 7.4?
A. Base form
B. Conjugate acid form
C. Both are present at equal concentrations. - Answer B. Conjugate acid form
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