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BCH Exam 1 (questions with complete solutions)
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BCH Exam 1 (questions with complete solutions)
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BCH Exam 1Most living matter consists of a relatively large number of chemical elements.
T/F - correct answer ✔✔False
A process with a large negative ∆G will always proceed rapidly.
T/F - correct answer ✔✔False
Which of the following molecules is in the most oxidized form?
NH3
NO3-
NH2OH
NO2- - correct answer ✔✔NO3-
A ΔGo value of zero indicates that the reactions or processes are at equilibrium.
T/F - correct answer ✔✔True
Which one of the following is part of the primary tier of elements (most abundant) in living systems?
P
V
N
Cl
Na - correct answer ✔✔N
Identify the major biomolecule below.
amino acid
nucleotide
,lipid
carbohydrate - correct answer ✔✔Carbohydrate
Identify the functional group indicated in the molecule below.
C=O
I
O-
amide
amine
carboxylate
ketone - correct answer ✔✔carboxylate
Hydrogen bonds are an example of weak non-covalent interactions, which are common in biological
molecules.
T/F - correct answer ✔✔True
Which description best characterizes the length of a hydrogen bond between water molecules?
About the same length as a calculated O-H van der Waals distance
About the same length as a covalent O-H bond
Shorter than a covalent O-H bond
Longer than a covalent O-H bond, but shorter than the calculated van der Waals distance - correct
answer ✔✔Longer than a covalent O-H bond, but shorter than the calculated van der Waals distance
Which of the following correctly lists bonding interactions in terms of their increasing strength:
, Covalent bonds<hydrogen bonds<ionic interactions<Van der Waals interactions
Van der Waals interactions<hydrogen bonding<ionic interactions<covalent bonds
Hydrogen bonds<ionic interactions<covalent interactions<Van der Waals interactions
Van der Waals interactions<ionic interactions<hydrogen bonding<covalent bonds - correct answer
✔✔Van der Waals interactions<hydrogen bonding<ionic interactions<covalent bonds
Which of the following functional groups could NOT act as a hydrogen bond donor?
An amino group.
A hydroxyl group.
An ester.
An aldehyde.
Both aldehyde and ester. - correct answer ✔✔Both aldehyde and ester.
Which of the following types of bonding interactions is NOT classified as non-covalent?
Hydrogen bonding.
Electrostatic interactions.
Van der Waals.
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