UNCW BIO 201 2 ACTUAL EXAM
PAPER 2026 QUESTIONS WITH
ANSWERS GRADED A+
◍ Metabolism.
Answer: the sum of all the chemical reactions in a cell
◍ Metabolic Pathway.
Answer: A series of chemical reactions that either builds a complex
molecule or breaks down a complex molecule into simpler compounds
◍ Catabolic Pathway.
Answer: Breaking down larger molecules to form smaller molecules while
releasing energy, energy is stored in the intermediates which are used to
drive endergonic reactions
◍ Examples of Catabolic Pathway.
Answer: ATP, NADH, NADPH, FADH2, Acetyl CoA
◍ membrane mosaic structure.
Answer: enables membrane function
◍ phospholipid organization.
Answer: organize spontaneously in aqueous solutionstails form a
hydrophobic barrier that will keep hydrophilic areas from going into the
center of the membrane
◍ hydrophobic interactions.
Answer: cage-like structure of water forms around the
hydrophobehydrophobic exclusion
◍ making a fluid membrane.
Answer: 1. hydrophobic exclusion pushes the fatty acid tails of
, phospholipids together2. hydrogen bonds and hydration spheres form
between water and the hydrophobic heads3. van der waals interactions
among the hydrophobic portions of molecules determines the membrane
fluidity
◍ Anabolic Pathway.
Answer: Synthesizing larger molecules using smaller molecules and energy
(small molecules assembled into larger ones)
◍ Reduction.
Answer: the addition of electrons to a molecule
◍ more van der waals forces.
Answer: less fluidity
◍ Oxidation.
Answer: the removal of electrons from a molecule
◍ why is it important to maintain a constant body temperature?.
Answer: to maintain van der waals forces and membrane fluidity
◍ OIL RIG.
Answer: oxidation is loss, reduction is gain
◍ Redox reactions need?.
Answer: An electron donor, an electron acceptor, and an enzyme to facilitate
the transfer.
◍ Feedback Inhibition.
Answer: The product of the metabolic pathway inhibits an enzyme early in
the pathway (Ex: Amino Acid)
◍ Feedback Inhibition Diagram Explanation:.
Answer: If the concentration of the final product becomes high, then it will
bind to enzyme one and cause a conformational change that inhibits the
ability of an enzyme to convert the initial substance into intermediate one.
◍ Metabolism involves what?.
Answer: The oxidation and reduction of molecules
, ◍ What two things are linked in biological systems?.
Answer: Oxidation and reduction
◍ Positive Feedback.
Answer: Occurs when products of a reaction lead to an increase in the
reaction (Ex: oxytocin during childbirth stimulates muscle contractions that
push a baby through childbirth).
◍ T or F? Life is energy..
Answer: True
◍ cell membranes are semi fluid.
Answer: non covalent bonds are made and broken a lotmolecules must be
able to move in the membrane
◍ what makes the membrane fluid?.
Answer: hydrophobic portions of membrane molecules interact with each
other by van der waals forces
◍ cholesterol.
Answer: only found in animalscan fill gaps between acyl chains (tails on the
phospholipid) and create van der waals forces
◍ what happens if a membrane is less fluid?.
Answer: you will not function as well
◍ T or F? Thousands of chemical reactions occur inside a cell..
Answer: True
◍ T or F? Do cells convert various energy sources into useable energy to
perform work?.
Answer: True
◍ fevers.
Answer: heat separates acyl chains and breaks van der waals forces
◍ T or F? Some organisms convert energy from food to light..
Answer: True
PAPER 2026 QUESTIONS WITH
ANSWERS GRADED A+
◍ Metabolism.
Answer: the sum of all the chemical reactions in a cell
◍ Metabolic Pathway.
Answer: A series of chemical reactions that either builds a complex
molecule or breaks down a complex molecule into simpler compounds
◍ Catabolic Pathway.
Answer: Breaking down larger molecules to form smaller molecules while
releasing energy, energy is stored in the intermediates which are used to
drive endergonic reactions
◍ Examples of Catabolic Pathway.
Answer: ATP, NADH, NADPH, FADH2, Acetyl CoA
◍ membrane mosaic structure.
Answer: enables membrane function
◍ phospholipid organization.
Answer: organize spontaneously in aqueous solutionstails form a
hydrophobic barrier that will keep hydrophilic areas from going into the
center of the membrane
◍ hydrophobic interactions.
Answer: cage-like structure of water forms around the
hydrophobehydrophobic exclusion
◍ making a fluid membrane.
Answer: 1. hydrophobic exclusion pushes the fatty acid tails of
, phospholipids together2. hydrogen bonds and hydration spheres form
between water and the hydrophobic heads3. van der waals interactions
among the hydrophobic portions of molecules determines the membrane
fluidity
◍ Anabolic Pathway.
Answer: Synthesizing larger molecules using smaller molecules and energy
(small molecules assembled into larger ones)
◍ Reduction.
Answer: the addition of electrons to a molecule
◍ more van der waals forces.
Answer: less fluidity
◍ Oxidation.
Answer: the removal of electrons from a molecule
◍ why is it important to maintain a constant body temperature?.
Answer: to maintain van der waals forces and membrane fluidity
◍ OIL RIG.
Answer: oxidation is loss, reduction is gain
◍ Redox reactions need?.
Answer: An electron donor, an electron acceptor, and an enzyme to facilitate
the transfer.
◍ Feedback Inhibition.
Answer: The product of the metabolic pathway inhibits an enzyme early in
the pathway (Ex: Amino Acid)
◍ Feedback Inhibition Diagram Explanation:.
Answer: If the concentration of the final product becomes high, then it will
bind to enzyme one and cause a conformational change that inhibits the
ability of an enzyme to convert the initial substance into intermediate one.
◍ Metabolism involves what?.
Answer: The oxidation and reduction of molecules
, ◍ What two things are linked in biological systems?.
Answer: Oxidation and reduction
◍ Positive Feedback.
Answer: Occurs when products of a reaction lead to an increase in the
reaction (Ex: oxytocin during childbirth stimulates muscle contractions that
push a baby through childbirth).
◍ T or F? Life is energy..
Answer: True
◍ cell membranes are semi fluid.
Answer: non covalent bonds are made and broken a lotmolecules must be
able to move in the membrane
◍ what makes the membrane fluid?.
Answer: hydrophobic portions of membrane molecules interact with each
other by van der waals forces
◍ cholesterol.
Answer: only found in animalscan fill gaps between acyl chains (tails on the
phospholipid) and create van der waals forces
◍ what happens if a membrane is less fluid?.
Answer: you will not function as well
◍ T or F? Thousands of chemical reactions occur inside a cell..
Answer: True
◍ T or F? Do cells convert various energy sources into useable energy to
perform work?.
Answer: True
◍ fevers.
Answer: heat separates acyl chains and breaks van der waals forces
◍ T or F? Some organisms convert energy from food to light..
Answer: True
