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DAT Bootcamp Questions and Answers 2024/2025( A+ GRADED 100% VERIFIED).
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DAT Bootcamp QuestionsThe resting potential of a neuron arises due to which of the following?
A. the concentration of potassium ions in the extracellular space is greater than the
concentration of sodium ions inside the axon.
B. the concentration of potassium ions in the extracellular space is less than the concentration
of sodium ions inside the axon.
C. The concentration of potassium ions in the extracellular space is equal to the concentration
of sodium ions inside the axon.
D. the concentration of sodium ions in the extracellular space is greater than the concentration
of potassium ions inside the axon.
E. the concentration of sodium ions in the extracellular space is less than the concentration of
potassium ions inside the axon. - ANS Correct Answer: D. the concentration of sodium ions in
the extracellular space is greater than the concentration of potassium ions inside the axon.
In a resting neuron, there are more potassium ions inside of the axon than outside in the
extracellular space. Likewise there is more sodium in the extracellular space than inside of the
axon. The difference in the concentrations of the ions results in a resting potential inside of the
axon of -70mV (in humans). When the action potential occurs, sodium/potassium channels
open, allowing the free movement of sodium ions into the axon and potassium ions out of the
axon. This causes the axon to depolarize and become positive. After the action potential, the
resting potential is restored using the sodium/potassium pumps.
Here is Monday's #DAT Question of the Day:
How many degrees of unsaturation are present in the anxiolytic drug Valium (diazepam),
molecular formula C₁₆H₁₃ClN₂O?
A. 8
B. 9
C. 10
D. 11
E. 12
How many degrees of unsaturation are present in the anxiolytic drug Valium (diazepam),
molecular formula C₁₆H₁₃ClN₂O?
A. 8
B. 9
C. 10
D. 11
, E. 12 - ANS (2C+2+N-X-H)/2
So D
Two trains are approaching each other from opposite directions with the speeds 10 miles per
hour and 20 miles per hour, and heading for a collision. If they are a quarter mile apart, how
long will it take for them to collide?
A. 45 seconds
B. 20 seconds
C. 30 seconds
D. 40 seconds
E. 1 minute - ANS Correct Answer: C. 30 seconds
The speed at which the two trains are closing the gap between them is 10 + 20 = 30 mph. At the
is speed, it will take (0.25/30) × 3600 = 30 seconds to close a gap of 0.25 miles.
*To make it simpler, use 1/4 instead of 0.25mi.
1. Which of the following is the earliest event in the development of the first living cell?
A. Development of DNA inside a plasma membrane
B. Evolution of aerobic respiration
C. Development of photosynthesis
D. Increase in oxygen in the atmosphere
E. Development of RNA with enzymatic functions - ANS E. Development of RNA with
enzymatic functions
According to the RNA world hypothesis, self-replicating ribonucleic acid (RNA) molecules were
precursors to current life. RNA stores genetic information (like DNA) and can catalyze chemical
reactions (like an enzyme) which would have allowed it to play a major role in the evolution of
cellular life, so the answer choice is correct.
RNA is thought to be the original molecule for the origin of life. The reasons surrounding this are
that RNA can store genetic information and also has enzymatic properties. DNA is thought to
originate later when cells needed more stability, as the replication and transcription of DNA is
much more complicated than RNA. RNA is also more reactive due to the 2'-OH group, making it
more favorable to react to synthesize other molecules and self-replicate.
All of the other answer choices must come after the development of RNA. Respiration could not
evolve until the enzymes required for it evolved, and oxygen could not exist without
photosynthesis first, both of which require an already living cell.
2. All of the following are secondary messengers used in signal transduction EXCEPT one.
Which one is the EXCEPTION?
A. cAMP
B. DAG
C. IP3
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