AP Bio FRQs Study Guide with Complete
Solutions
Describe the role of carbon in biological systems. - Answer️️ -The response indicates
that carbon is used to build biological macromolecules such as carbohydrates, proteins,
nucleic acids, and lipids.
Explain how, when the membranes are fused...
that two amino acids with charged or ionic or hydrophilic R-groups were replaced by two
amino acids with uncharged or nonpolar or hydrophobic R-groups.
Using the template below that represents the four levels of protein structure, place an X
on each level that is expected to be altered as a result of the amino acid substitutions
shown in Figure 1. - Answer✔️✔️-The response indicates primary and tertiary structure.
Explain how the amino acid substitution shown in Figure 1 is most likely to affect the
function of Receptor X. - Answer✔️✔️-The response indicates that because function is
determined by shape, the function of receptor X is likely to change OR that the
structural change might alter the binding of the molecule to receptor X OR that the
structural change might alter the ability of receptor X to cause a cellular response.
Identify the most likely mode of transport across the membrane for substance L. Explain
how information provided helps determine the most likely mode of transport. -
Answer✔️✔️-The response indicates that substance L most likely crosses the membrane
by active transport. The response indicates that the cells maintain an intracellular
concentration of 120 mM, which is always greater than the concentration of substance L
in the culture medium.
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