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Biology Cumulative Exam Study Questions and 100% Correct Answer
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Biology Cumulative Exam Study Questions and 100% Correct Answer
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Biology Cumulative Exam Study Questions and100% Correct Answers
According to the fluid mosaic model of cell membranes, phospholipids ________. - ✔✔can
move laterally along the plane of the membrane
The membranes of winter wheat are able to remain fluid when it is extremely cold by
________. - ✔✔increasing the proportion of unsaturated phospholipids in the membrane
According to the fluid mosaic model, a membrane ________. - ✔✔is composed of a fluid
bilayer of phospholipids with embedded amphipathic proteins
An animal cell lacking carbohydrates on the external surface of its plasma membrane would
likely be impaired in which function? - ✔✔cell-cell recognition
Which of the following types of molecules are hydrophilic and therefore excluded from the
hydrophobic portion of the phospholipid bilayer? - ✔✔peripheral membrane proteins
Which of the following statements is true of metabolism in its entirety in all organisms? -
✔✔Metabolism consists of all the energy transformation reactions in an organism.
Which of the following is an example of potential rather than kinetic energy? - ✔✔a
molecule of glucose
Most cells cannot harness heat to perform work because ________. - ✔✔temperature is
usually uniform throughout a cell
A decrease in entropy is associated with which type of reaction? - ✔✔dehydration
, Which of the following terms most precisely describes the cellular process of breaking down
large molecules into smaller ones? - ✔✔catabolism (catabolic pathways)
Which of the following statements about anabolic pathways is true? - ✔✔They consume
energy to build up polymers from monomers.
Which of the following statements describes the first law of thermodynamics? - ✔✔Energy
cannot be created or destroyed.
In which reactions of cellular respiration and fermentation does substrate-level
phosphorylation occur? - ✔✔in both glycolysis and the citric acid cycle
Which of the following statements describes what happens to a molecule that functions as the
reducing agent (electron donor) in a redox or oxidation-reduction reaction? - ✔✔It loses
electrons and loses potential energy.
What happens when electrons are passed from one atom to a more electronegative atom? -
✔✔The more electronegative atom is reduced, and energy is released.
Which of the summary statements below describes the results of the following reaction?
C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + Energy - ✔✔C6H12O6 is oxidized and O2 is reduced.
What happens to a glucose molecule when it loses a hydrogen atom as the result of an
oxidation-reduction reaction? - ✔✔The glucose molecule is oxidized.
When a molecule of NAD+ (nicotinamide adenine dinucleotide) gains a hydrogen atom (not a
proton), the molecule becomes ________. - ✔✔reduced
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