As the number of C=C double bonds in a fatty acid _______, the melting point ____.
A) increases, increases
B) increases, decreases
C) decreases, decreases - B) increases, decreases
A biological molecule is shown here. What is the most likely classification of this molecule?
A) carbohydrate
B) protein
C) lipid
D) nucleic acid - C) lipid
Classify the lipid shown here as saturated or unsaturated and determine the number of carbon atoms
present.
A) saturated, 18
B) unsaturated, 18
C) saturated, 17
D) unsaturated, 17
E) unsaturated, 16 - B) unsaturated, 18
,What type of lipid is shown here?
A) fatty acid
B) steroid
C) vitamin
D) wax - A) fatty acid
The majority of natural unsaturated fatty acids exist in what configuration?
A) trans
B) cis
C) gauche
D) meta
E) para - B) cis
What type of lipid contains the structural core shown here? (hexagons branching off one another)
A) fatty acid
B) steroid
C) wax
D) triglyceride
E) sphingolipid - B) steroid
What is the difference between integral and peripheral proteins?
A) Integral proteins are required for the cell to function, while peripheral proteins are accessory.
B) Integral proteins are found on the outside of the cell, while peripheral proteins are found on the
inside of the cell.
C) Integral proteins extend through the lipid bilayer, and peripheral proteins are just on the surface of
the inside or outside of the cell.
D) Integral proteins are found on the inside of the cell, while peripheral proteins are found on the
outside of the cell.
,E) Integral proteins are channel proteins and peripheral proteins act as enzymes. - C) Integral proteins
extend through the lipid bilayer, and peripheral proteins are just on the surface of the inside or outside
of the cell.
What term(s) best describe cell membranes?
A) Semi-permeable
B) Fluid mosaic model
C) Phospholipid bilayer
D) Liquid-like
E) All of the terms are correct - E) All of the terms are correct
The predominant intermolecular force between molecules of I₂ is _____
A) ionic bonds.
B) dipole-dipole interactions.
C) ion-dipole interactions.
D) dispersion forces.
E) covalent bonds. - D) dispersion forces.
Which of the following would exhibit hydrogen bonding in a pure substance?
A) HCl
B) CH₃CH₃
C) CF₂H₂
D) CH₃CH₂OH
E) CH₃OCH₃ - D) CH₃CH₂OH
What intermolecular forces are present between two molecules of HI?
A) dispersion only
B) dipole-dipole only
C) hydrogen bonding only
, D) dispersion and dipole-dipole
E) dispersion and hydrogen bonding - D) dispersion and dipole-dipole
Identify the type or types of intermolecular forces present between molecules of the compound
pictured below:
A) dispersion only
B) dipole-dipole
C) hydrogen bonding
D) dispersion and dipole-dipole only
E) dispersion, dipole-dipole, and hydrogen bonding - E) dispersion, dipole-dipole, and hydrogen bonding
Which is expected to have the lowest vapor pressure?
A) CH₄
B) SiH₄
C) NH₃
D) PH₃
E) H₂O - E) H₂O
Which of the following has the lowest boiling point?
A) C₅H₁₂
B) C₇H₁₆
C) C₉H₂₀
D) C₁₁H₂₄
E) C₁₃H₂₈ - A) C₅H₁₂
Which property typically indicates strong intermolecular forces are present in a liquid?
A) low heat of vaporization
B) low critical temperature
C) low vapor pressure
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