UWORLD MCAT 2025/2026 ANSWERS AND QUESTIONS
GRADED A+
✔✔positive reinforcement - ✔✔desirable stimulus is added in order to increase the
behavior
✔✔social loafing - ✔✔an individual expends less effort when working as a part of a
group than when working alone
✔✔how do cells lacking mitochondria regenerate NAD+ that is required by glycolysis? -
✔✔oxidize NADH to regenerate NAD+ through fermentation in the lactate
dehydrogenase reaction
✔✔McDonaldization - ✔✔when social structures increase efficiency, quantity,
standardization, and automation at the expense of individuality, quality, and a skilled
work force
✔✔isochoric - ✔✔no change in volume
✔✔division of labor - ✔✔specialization of employment into interdependent jobs (can
have positive or negative consequences)
✔✔Diamagnetic - ✔✔when electrons in their subshells are all paired
✔✔paramagnetic - ✔✔not all of the electrons are paired when in their subshells
✔✔acetylation of histones - ✔✔transfer of an acetyl group from Acetyl-CoA to positively
charged amino groups on arginine or lysine residues
-increases gene expression by disrupting salt bridges between histones and DNA
✔✔taste aversions - ✔✔(type of classical conditioning)
occurs after just one instance of becoming ill following consumption of a specific
food/beverage
✔✔what affect do indicators have on the pH of a titration reaction? - ✔✔none. they do
not change the pH, they only respond to changes in pH
✔✔favorable reactions have what sign for Gibbs Free Energy? - ✔✔negative
✔✔reliability - ✔✔consistency of an experiment of measure--- continues to produce very
similar results each time it is completed
GRADED A+
✔✔positive reinforcement - ✔✔desirable stimulus is added in order to increase the
behavior
✔✔social loafing - ✔✔an individual expends less effort when working as a part of a
group than when working alone
✔✔how do cells lacking mitochondria regenerate NAD+ that is required by glycolysis? -
✔✔oxidize NADH to regenerate NAD+ through fermentation in the lactate
dehydrogenase reaction
✔✔McDonaldization - ✔✔when social structures increase efficiency, quantity,
standardization, and automation at the expense of individuality, quality, and a skilled
work force
✔✔isochoric - ✔✔no change in volume
✔✔division of labor - ✔✔specialization of employment into interdependent jobs (can
have positive or negative consequences)
✔✔Diamagnetic - ✔✔when electrons in their subshells are all paired
✔✔paramagnetic - ✔✔not all of the electrons are paired when in their subshells
✔✔acetylation of histones - ✔✔transfer of an acetyl group from Acetyl-CoA to positively
charged amino groups on arginine or lysine residues
-increases gene expression by disrupting salt bridges between histones and DNA
✔✔taste aversions - ✔✔(type of classical conditioning)
occurs after just one instance of becoming ill following consumption of a specific
food/beverage
✔✔what affect do indicators have on the pH of a titration reaction? - ✔✔none. they do
not change the pH, they only respond to changes in pH
✔✔favorable reactions have what sign for Gibbs Free Energy? - ✔✔negative
✔✔reliability - ✔✔consistency of an experiment of measure--- continues to produce very
similar results each time it is completed
