EBIO 1210 : EXAM 1 QUESTIONS WITH COMPLETE SOLUTIONS
Phospholipids are the perfect basis for making a biological membrane because they: --
Answer ✔✔ form bilayers that serve as an impenetrable barrier for most molecules.
The side groups of amino acids making up the EXTERIOR middle portion (in contact
with the cell membrane) of the calcium (Ca2+) pump must be: -- Answer ✔✔ able to
interact with the fatty acid tails of the membrane.
While ______ is the blueprint for making all proteins, it is _______ that carries the
information for how to make a specific _____ to the ribosomes. -- Answer ✔✔ DNA;
RNA; protein
A steroid hormone reaches a target cell and triggers a response. Where would you find
the hormone as it triggers the response? -- Answer ✔✔ in the nucleus of the target cell
Fatty acids cross membranes by: -- Answer ✔✔ simple diffusion.
What is involved in the removal of cholesterol-carrying LDL from the blood stream? --
Answer ✔✔ binding of LDL to a receptor on the cell surface and endocytosis
The formation of large aggregates of hemoglobin molecules in sickle-cell anemia is
promoted by interaction of amino acids with _____ side groups. -- Answer ✔✔
hydrophobic
What is involved in the process by which ATP fuels cellular work? -- Answer ✔✔
transfer of a negatively charged phosphate group
Cells of glands that synthesize human sex hormones contain high levels of: -- Answer
✔✔ smooth endoplasmic reticulum.
