WCU - PHYS 261 MIDTERM EXAM LATEST UPDATED
2026/2027 CORRECT VERIFIED 100% PASS
(Graded A+)
Which of the following occur when an atom has such a strong attraction
for electrons that it pulls one or more electrons completely away from
another atom and causing ions to form? - VERIFIED UPDATED ANSWER -
Ionic Bond
What are the four lobes of each cerebral hemisphere? - VERIFIED
UPDATED ANSWER - Frontal, parietal, temporal, and occipital lobes.
What does cerebral gray matter include? - VERIFIED UPDATED ANSWER -
The cerebral cortex, basal ganglia, and limbic system.
How does ion channel permeability affect membrane potential? - VERIFIED
UPDATED ANSWER - Opening/closing ion channels changes permeability;
even few ions moving can change membrane potential significantly.
,What triggers gated ion channels to open or close? - VERIFIED UPDATED
ANSWER - Chemical signals, mechanical signals, or membrane
depolarization.
Which can serve as substrates for ATP production? - VERIFIED UPDATED
ANSWER - glucose, amino acids, fatty acids
Activation energy is - VERIFIED UPDATED ANSWER - energy needed to start
a reaction
Enzymes increase reaction rate by - VERIFIED UPDATED ANSWER -
lowering the activation energy of the reaction
A competitive inhibitor binds to - VERIFIED UPDATED ANSWER - the active
site of the enzyme
After forming a complex with the ribosome, mRNA interacts with a third
molecule. This molecule is called - VERIFIED UPDATED ANSWER - tRNA
An enzyme that adds or subtracts water molecules is a - VERIFIED
UPDATED ANSWER - Hydrolase
,Information stored in the genes is translated into - VERIFIED UPDATED
ANSWER - Ribosomes
When an enzyme 's activity is inactivated by heat or a change in PH, the
enzyme is said to be - VERIFIED UPDATED ANSWER - denatured
An enzyme that transfers phosphates from ATP to substrate molecule is a
- VERIFIED UPDATED ANSWER - Protein kinase
The reactions of glycolysis occur in the cell's ________; the reactions of
the citric acid cycle occur in ___________. - VERIFIED UPDATED ANSWER -
cytoplasm, mitochondria
End product inhibition/Feedback inhibition describes the process whereby
increasing amounts of _______ reduce activity of the enzyme. - VERIFIED
UPDATED ANSWER - Product
When indirect form of energy is released during reactions, it is
temporarily trapped in energy carrying molecules called coenzymes.
Which of the following is a coenzyme? - VERIFIED UPDATED ANSWER -
, In the aerobic metabolism of glucose,_________ acts as the final acceptor
of electrons. - VERIFIED UPDATED ANSWER - Oxygen
ATP synthase transfers the stored energy of the H+ ions to the high-
energy phosphate bond of ________ to form________. - VERIFIED UPDATED
ANSWER -
The TAC sequence of DNA is the ________ of a coding sequence that is
preceded by the __________ that regulates transcription. - VERIFIED
UPDATED ANSWER - Start, promoter region
All of the triplet codons needed to Geneproduce one functional piece of
RNA are found in one - VERIFIED UPDATED ANSWER - Gene
An allosteric modulator binds to - VERIFIED UPDATED ANSWER - a site
other than the active site
The process of forming mRNA is called - VERIFIED UPDATED ANSWER -
transcription
2026/2027 CORRECT VERIFIED 100% PASS
(Graded A+)
Which of the following occur when an atom has such a strong attraction
for electrons that it pulls one or more electrons completely away from
another atom and causing ions to form? - VERIFIED UPDATED ANSWER -
Ionic Bond
What are the four lobes of each cerebral hemisphere? - VERIFIED
UPDATED ANSWER - Frontal, parietal, temporal, and occipital lobes.
What does cerebral gray matter include? - VERIFIED UPDATED ANSWER -
The cerebral cortex, basal ganglia, and limbic system.
How does ion channel permeability affect membrane potential? - VERIFIED
UPDATED ANSWER - Opening/closing ion channels changes permeability;
even few ions moving can change membrane potential significantly.
,What triggers gated ion channels to open or close? - VERIFIED UPDATED
ANSWER - Chemical signals, mechanical signals, or membrane
depolarization.
Which can serve as substrates for ATP production? - VERIFIED UPDATED
ANSWER - glucose, amino acids, fatty acids
Activation energy is - VERIFIED UPDATED ANSWER - energy needed to start
a reaction
Enzymes increase reaction rate by - VERIFIED UPDATED ANSWER -
lowering the activation energy of the reaction
A competitive inhibitor binds to - VERIFIED UPDATED ANSWER - the active
site of the enzyme
After forming a complex with the ribosome, mRNA interacts with a third
molecule. This molecule is called - VERIFIED UPDATED ANSWER - tRNA
An enzyme that adds or subtracts water molecules is a - VERIFIED
UPDATED ANSWER - Hydrolase
,Information stored in the genes is translated into - VERIFIED UPDATED
ANSWER - Ribosomes
When an enzyme 's activity is inactivated by heat or a change in PH, the
enzyme is said to be - VERIFIED UPDATED ANSWER - denatured
An enzyme that transfers phosphates from ATP to substrate molecule is a
- VERIFIED UPDATED ANSWER - Protein kinase
The reactions of glycolysis occur in the cell's ________; the reactions of
the citric acid cycle occur in ___________. - VERIFIED UPDATED ANSWER -
cytoplasm, mitochondria
End product inhibition/Feedback inhibition describes the process whereby
increasing amounts of _______ reduce activity of the enzyme. - VERIFIED
UPDATED ANSWER - Product
When indirect form of energy is released during reactions, it is
temporarily trapped in energy carrying molecules called coenzymes.
Which of the following is a coenzyme? - VERIFIED UPDATED ANSWER -
, In the aerobic metabolism of glucose,_________ acts as the final acceptor
of electrons. - VERIFIED UPDATED ANSWER - Oxygen
ATP synthase transfers the stored energy of the H+ ions to the high-
energy phosphate bond of ________ to form________. - VERIFIED UPDATED
ANSWER -
The TAC sequence of DNA is the ________ of a coding sequence that is
preceded by the __________ that regulates transcription. - VERIFIED
UPDATED ANSWER - Start, promoter region
All of the triplet codons needed to Geneproduce one functional piece of
RNA are found in one - VERIFIED UPDATED ANSWER - Gene
An allosteric modulator binds to - VERIFIED UPDATED ANSWER - a site
other than the active site
The process of forming mRNA is called - VERIFIED UPDATED ANSWER -
transcription
