BIOD 101 - Exam 1
_________ are the most abundant lipids in living organisms. These compounds,
commonly known simply as ______, are an economical form of reserve fuel storage
because when broken down they yield more than twice as much energy per gram as
carbohydrates. - ANS - Triglycerides
fats
\As part of the cytoskeleton, what are the roles of microfilaments? - ANS -
Microfilaments are thinner and made of two intertwined protein polymers of actin. These
structures provide structural support to the cells shape as well as a means of motility
\Explain what happens to a cell when it is placed in an isotonic solution. - ANS - When
placed in an isotonic solution, the cell will neither shrink nor swell because the solute
concentration inside the cell equals the solute concentration outside the cell
\Fill-in-the-Blank: _______ elements are required only in small quantities, whereas
_______ elements are required for human life. - ANS - trace
essential
\Fill-in-the-Blank: Specific ions bind to _____________, and when a certain
concentration has successfully attached, the conformation of the channel changes
allowing for ions on the outside to passively diffuse into the cell. - ANS - carrier
proteins
\Name TWO of the four types of passive transport. - ANS - (1) simple diffusion, (2)
osmosis (3) filtration, and (4) facilitated diffusion
\Primary structure - ANS - Order in which amino acid monomer units are arranged in a
linear polypeptide chain
\quaternary structure - ANS - occurs when two or more polypeptide chains interact
\secondary structure - ANS - includes repeating patterns such as alpha-helices and
Beta-sheets
\tertiary structure - ANS - overall three-dimensional shape assumed by each
polypeptide chain
\True or False; If false, make the statement true: Passive transport is vital for moving
essential nutrients into the cell. Should passive transport stop, the cell would cease to
function. - ANS - False; Active transport is vital for moving essential nutrients into the
cell. Should active transport stop, the cell would cease to function.
\True or False; If false, make the statement true: The head group of a phospholipid is
hydrophobic. - ANS - False; The head group of a phospholipid is hydrophilic.
_________ are the most abundant lipids in living organisms. These compounds,
commonly known simply as ______, are an economical form of reserve fuel storage
because when broken down they yield more than twice as much energy per gram as
carbohydrates. - ANS - Triglycerides
fats
\As part of the cytoskeleton, what are the roles of microfilaments? - ANS -
Microfilaments are thinner and made of two intertwined protein polymers of actin. These
structures provide structural support to the cells shape as well as a means of motility
\Explain what happens to a cell when it is placed in an isotonic solution. - ANS - When
placed in an isotonic solution, the cell will neither shrink nor swell because the solute
concentration inside the cell equals the solute concentration outside the cell
\Fill-in-the-Blank: _______ elements are required only in small quantities, whereas
_______ elements are required for human life. - ANS - trace
essential
\Fill-in-the-Blank: Specific ions bind to _____________, and when a certain
concentration has successfully attached, the conformation of the channel changes
allowing for ions on the outside to passively diffuse into the cell. - ANS - carrier
proteins
\Name TWO of the four types of passive transport. - ANS - (1) simple diffusion, (2)
osmosis (3) filtration, and (4) facilitated diffusion
\Primary structure - ANS - Order in which amino acid monomer units are arranged in a
linear polypeptide chain
\quaternary structure - ANS - occurs when two or more polypeptide chains interact
\secondary structure - ANS - includes repeating patterns such as alpha-helices and
Beta-sheets
\tertiary structure - ANS - overall three-dimensional shape assumed by each
polypeptide chain
\True or False; If false, make the statement true: Passive transport is vital for moving
essential nutrients into the cell. Should passive transport stop, the cell would cease to
function. - ANS - False; Active transport is vital for moving essential nutrients into the
cell. Should active transport stop, the cell would cease to function.
\True or False; If false, make the statement true: The head group of a phospholipid is
hydrophobic. - ANS - False; The head group of a phospholipid is hydrophilic.
