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Biology Exam AP Study Guide Exam Questions And Actual Answers.
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(Unit 1) Describe the role of carbon in biological systems. - Answer 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 intera...

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  • November 21, 2024
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  • 2024/2025
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Biology Exam AP Study Guide Exam
Questions And Actual Answers.
(Unit 1) Describe the role of carbon in biological systems. - Answer 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. - Answer 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. - Answer 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. - Answer 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. -
Answer 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. - Answer Based on the R groups of the original and substituted amino acids, 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.

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