BMSC 230 EXAM LATEST 2025 WITH COMPLETE
QUESTIONS and VERIFIED ANSWERS GRADED
A+|ASSURED SUCCESS
Which of the statements below about cytochromes - CORRECT ANSWER--
They are involved in redox reactions.
- They are proteins that contain iron
- The heme in cytochromes is covalently linked to the protein moiety.
,Which statement about reactive oxygen species (ROS) is CORRECT? - CORRECT
ANSWER-ROS are highly reactive with many biomolecules in the cell.
What cellular compartment are the electron transport chain complexes located
in? - CORRECT ANSWER-The inner mitochondrial membrane.
catabolism - CORRECT ANSWER-breakdown biomolecules to produce energy
anabolism - CORRECT ANSWER-synthesis of biomolecules , requires input of
energy
Functions of metabolism - CORRECT ANSWER-1) to obtain chemical energy in
form of ATP from the degradation of energy-rich nutrients from environment
2) convert molecules that we ingest as food into the building blocls of larger
molecules neded in the body
3) assembles these small building block molecules into larger molecules such as
protiens, nucleic acids, lipids, polysaccharides
4) synthesize & degrade biomolecules that have specialized functions in cells
glycolysis - CORRECT ANSWER-starts with glucose converts to pyruvate
pathways can be - CORRECT ANSWER-1) linear
,2) branched
3) circular
first committed step - CORRECT ANSWER-- often the first reaction
- usually a point of regulation
living organisms require a continual input of free energy (3) becuase : -
CORRECT ANSWER-1) performance of mechanical work
2) active transport of biomolecules and ions
3) synthesis of macromolecules from simple precursors
enzymes - CORRECT ANSWER-- speed up the rate of a chemical reaction
- DONT change the equilibrium, just rate at which it reaches it
two thermodynamic properties - CORRECT ANSWER-1) free energy differences
between products and reactants
2) free energy required to initiate the conversion of reactants to products
* free energy difference determines whether a reaction will take place
spontaneously *
, reactions take place if... - CORRECT ANSWER-delta G is NEGATIVE
exergonic - CORRECT ANSWER-release energy
endergonic - CORRECT ANSWER-requires input of energy
determining delta G - CORRECT ANSWER-...
ATP - CORRECT ANSWER-- is the donor of most free energy for most energy
requiring processes in the cell
- has high phosphoryl-transfer potential
- readily transfers phosphate groups to water
the high energy bonds in ATP are: - CORRECT ANSWER-acid anhydride bonds =
2 of them
large standard energy change due to: (4) - CORRECT ANSWER-1) electrostatic
repulsion
2) when ATP hydrolyzed the electrostatic repulsion is reduced
3) resonance stabilizaton
QUESTIONS and VERIFIED ANSWERS GRADED
A+|ASSURED SUCCESS
Which of the statements below about cytochromes - CORRECT ANSWER--
They are involved in redox reactions.
- They are proteins that contain iron
- The heme in cytochromes is covalently linked to the protein moiety.
,Which statement about reactive oxygen species (ROS) is CORRECT? - CORRECT
ANSWER-ROS are highly reactive with many biomolecules in the cell.
What cellular compartment are the electron transport chain complexes located
in? - CORRECT ANSWER-The inner mitochondrial membrane.
catabolism - CORRECT ANSWER-breakdown biomolecules to produce energy
anabolism - CORRECT ANSWER-synthesis of biomolecules , requires input of
energy
Functions of metabolism - CORRECT ANSWER-1) to obtain chemical energy in
form of ATP from the degradation of energy-rich nutrients from environment
2) convert molecules that we ingest as food into the building blocls of larger
molecules neded in the body
3) assembles these small building block molecules into larger molecules such as
protiens, nucleic acids, lipids, polysaccharides
4) synthesize & degrade biomolecules that have specialized functions in cells
glycolysis - CORRECT ANSWER-starts with glucose converts to pyruvate
pathways can be - CORRECT ANSWER-1) linear
,2) branched
3) circular
first committed step - CORRECT ANSWER-- often the first reaction
- usually a point of regulation
living organisms require a continual input of free energy (3) becuase : -
CORRECT ANSWER-1) performance of mechanical work
2) active transport of biomolecules and ions
3) synthesis of macromolecules from simple precursors
enzymes - CORRECT ANSWER-- speed up the rate of a chemical reaction
- DONT change the equilibrium, just rate at which it reaches it
two thermodynamic properties - CORRECT ANSWER-1) free energy differences
between products and reactants
2) free energy required to initiate the conversion of reactants to products
* free energy difference determines whether a reaction will take place
spontaneously *
, reactions take place if... - CORRECT ANSWER-delta G is NEGATIVE
exergonic - CORRECT ANSWER-release energy
endergonic - CORRECT ANSWER-requires input of energy
determining delta G - CORRECT ANSWER-...
ATP - CORRECT ANSWER-- is the donor of most free energy for most energy
requiring processes in the cell
- has high phosphoryl-transfer potential
- readily transfers phosphate groups to water
the high energy bonds in ATP are: - CORRECT ANSWER-acid anhydride bonds =
2 of them
large standard energy change due to: (4) - CORRECT ANSWER-1) electrostatic
repulsion
2) when ATP hydrolyzed the electrostatic repulsion is reduced
3) resonance stabilizaton
