BIOC 201 - CH 2 EXAM QUESTIONS AND ACCUARATE ANSWERS 2024/2025 |
VERIFIED
A student observes that when an unknown molecule is added to water, it forms micelles, which under
the right conditions can form membranes. What can this student infer about this phenomenon? -
The unknown molecule is amphipathic.
Choose the functional group that CANNOT form a hydrogen bond with water. - aromatic ring
Gastroesophageal reflux disease is a common example of a pathological change in: - pH level
How many neighboring water molecules are hydrogen-bonded on average to one water molecule in a
sample of pure water? - 3
In a typical cell, the water content is about: - 70%
Oxygen is an electronegative atom. That means that in a molecule of water the: - electrons of
covalent bonds spend more time near the oxygen atom than near the hydrogen atoms.
The protein that interacts with both water and the hydrophobic regions of the membrane is considered:
- amphipathic.
Typical van der Waals energies are about: - 2-4 kJ/mol.
What amino acids are most likely to be found in the core of a water-soluble globular protein? -
nonpolar
What factor does NOT affect electrostatic interaction according to Coulomb's law? - a change in
entropy if the interaction occurs
What is the [A -]/[HA] ratio when a weak acid is in a solution one pH unit above its p K a? - 10:1
VERIFIED
A student observes that when an unknown molecule is added to water, it forms micelles, which under
the right conditions can form membranes. What can this student infer about this phenomenon? -
The unknown molecule is amphipathic.
Choose the functional group that CANNOT form a hydrogen bond with water. - aromatic ring
Gastroesophageal reflux disease is a common example of a pathological change in: - pH level
How many neighboring water molecules are hydrogen-bonded on average to one water molecule in a
sample of pure water? - 3
In a typical cell, the water content is about: - 70%
Oxygen is an electronegative atom. That means that in a molecule of water the: - electrons of
covalent bonds spend more time near the oxygen atom than near the hydrogen atoms.
The protein that interacts with both water and the hydrophobic regions of the membrane is considered:
- amphipathic.
Typical van der Waals energies are about: - 2-4 kJ/mol.
What amino acids are most likely to be found in the core of a water-soluble globular protein? -
nonpolar
What factor does NOT affect electrostatic interaction according to Coulomb's law? - a change in
entropy if the interaction occurs
What is the [A -]/[HA] ratio when a weak acid is in a solution one pH unit above its p K a? - 10:1
