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Biology Final Exam Questions and Answers. 2024/2025 Update.
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Biology Final Exam Questions and Answers. 2024/2025Update.
What is an example of a hydrogen bond? - ANSWER The attraction between a hydrogen of
one water molecule and the oxygen of another water molecule
Which factor is most important in the movement of water up a tall tree? - ANSWER Leaf
Transpiration
A substrate molecule may be bound to the active site of an enzyme by all of the following -
ANSWER hydrogen bonds
peptide bonds
van der waal’s interactions
hydrophobic interactions
What is responsible for the cohesive property of water? - ANSWER Hydrogen bonds
between the oxygen atom of one water molecule and a hydrogen atom of another water molecule
What are the membrane structures that function in active transport? - ANSWER integral
proteins
The movement of a substrate across a biological membrane against it's concentration gradient with
the help of energy input is - ANSWER active transport
carrier molecules in the membrane and metabolic energy are required for - ANSWER active
transport
which characterizes the sodium-potassium pump? - ANSWER Sodium ions are pumped out
of a cell against their gradient
potassium ions are pumped into a cell against their gradient
the pump protein undergoes a conformational change
, Takes materials out of the cell - ANSWER exocytosis
an organism with a cell wall would have the most difficulty doing which process? - ANSWER
phagocytosis
the presence of cholesterol in the plasma membranes of some animals - ANSWER enables
the membrane to stay fluid more easily when cell temperature drops
According to the fluid mosaic model of the cell membranes, which is a true statement about
membrane phospholipids? - ANSWER they can move laterally along the plane of the
membrane
what is one of the ways that the membranes of winter wheat are able to remain fluid when it is
extremely cold? - ANSWER by increasing the percentage of unsaturated phospholipids in
the membrane
all are functions of integral membrane proteins - ANSWER cytoskeleton attachment
hormone reception
active transport
cell adhesion
Which is most important for the glycoproteins and glycolipids of animal cell membranes? -
ANSWER a cell's ability to distinguish one type of neighboring cell from another
what would likely move through the lipid bilayer of a plasma membrane most rapidly? - ANSWER
CO2
the selective permeability of biological membranes is dependent on... - ANSWER the type
of transport proteins that are present in the membrane
the lipid bilayer being permeable to primarily small, nonpolar molecules
What is true for metabolic pathways? - ANSWER they are highly regulated sequences of
chemical reactions
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