AP BIOLOGY EXAM FRQ'S
QUESTIONS AND ANSWERS
(Unit 1) Describe the role of carbon in biological systems. - Correct Answers -Carbon is
used to build biological macromolecules such as carbohydrates, proteins, nucleic acids,
and lipids.
(Unit 1) Explain how, when the membranes are fused, the polar parts of the
phospholipids from one cell will interact with the phospholipids from the other cell and
how the nonpolar parts of the phospholipids from one cell will interact with the
phospholipids from the other cell. - Correct Answers -When the membranes are fused,
the polar parts of the phospholipids (hydrophilic head) from one cell to the other
dissolves in water and forming hydrogen bonds with the water. The non polar parts of
the phospholipids (hydrophobic tail) from one cell to the other avoids water. They create
a lipid bilayer where the hydrophobic tails are between the hydrophilic heads. When this
layer is formed the heads are exposed to water while the tails only interact with other
tails not the water.
(Unit 1) Make a claim about the most immediate effect on the fused B-cancer cells if the
fused cells are transferred to a growth medium that lacks a source of nitrogen. - Correct
Answers -The denature of the B-cancer cells would be the most immediate effect if the
fused cells are transferred to a growth medium that lacks a source of nitrogen. The cells
will either die OR be unable to synthesize DNA and RNA/nucleic acids/nucleotides and
amino.
(Unit 1) Provide reasoning with evidence based on the composition of biological
macromolecules to support your claim. - Correct Answers -Nitrogen is a part of the base
component in the biological macromolecules (nucleic acids (DNA, RNA, or nucleotides)
and amino acids (polypeptides, or proteins)) meaning that if there is a lack of it the B-
cancer cells would not be able to properly function or exist due to it missing and
important component to its structure.
Identify the process used to form the covalent peptide bonds that join amino acids into a
polypeptide. - Correct Answers -2 amino acids were joined together into a polypeptide
by hydrolysis, which is in its most basic description, the loss of a hydrogen molecule.
The change in the amino acid sequence illustrated in Figure 1 caused a change in the
shape of Receptor X. Based on the R groups of the original and substituted amino
acids, explain why Receptor X changed shape. - Correct Answers -Based on the R
QUESTIONS AND ANSWERS
(Unit 1) Describe the role of carbon in biological systems. - Correct Answers -Carbon is
used to build biological macromolecules such as carbohydrates, proteins, nucleic acids,
and lipids.
(Unit 1) Explain how, when the membranes are fused, the polar parts of the
phospholipids from one cell will interact with the phospholipids from the other cell and
how the nonpolar parts of the phospholipids from one cell will interact with the
phospholipids from the other cell. - Correct Answers -When the membranes are fused,
the polar parts of the phospholipids (hydrophilic head) from one cell to the other
dissolves in water and forming hydrogen bonds with the water. The non polar parts of
the phospholipids (hydrophobic tail) from one cell to the other avoids water. They create
a lipid bilayer where the hydrophobic tails are between the hydrophilic heads. When this
layer is formed the heads are exposed to water while the tails only interact with other
tails not the water.
(Unit 1) Make a claim about the most immediate effect on the fused B-cancer cells if the
fused cells are transferred to a growth medium that lacks a source of nitrogen. - Correct
Answers -The denature of the B-cancer cells would be the most immediate effect if the
fused cells are transferred to a growth medium that lacks a source of nitrogen. The cells
will either die OR be unable to synthesize DNA and RNA/nucleic acids/nucleotides and
amino.
(Unit 1) Provide reasoning with evidence based on the composition of biological
macromolecules to support your claim. - Correct Answers -Nitrogen is a part of the base
component in the biological macromolecules (nucleic acids (DNA, RNA, or nucleotides)
and amino acids (polypeptides, or proteins)) meaning that if there is a lack of it the B-
cancer cells would not be able to properly function or exist due to it missing and
important component to its structure.
Identify the process used to form the covalent peptide bonds that join amino acids into a
polypeptide. - Correct Answers -2 amino acids were joined together into a polypeptide
by hydrolysis, which is in its most basic description, the loss of a hydrogen molecule.
The change in the amino acid sequence illustrated in Figure 1 caused a change in the
shape of Receptor X. Based on the R groups of the original and substituted amino
acids, explain why Receptor X changed shape. - Correct Answers -Based on the R
