AP Biology Unit 1 – College Board Practice Questions, Answers, and Exam Study Guide

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AP Biology Test Booklet

AP Biology Unit Test 1: Chemistry of Life Name



1. A feature of organic compounds NOT found in inorganic compounds is the presence of


@ ionizing chemical groups


electrons




@ oxygen


@ hydrogen bonds




2. A student analyzed a viral genome and found that the genome had the following nucleotide composition.
* 28% adenine
* 20% thymine
* 35% cytosine
* 17% guanine
‘Which of the following best describes the structure of the viral genome?


@ Double-stranded DNA




@ Double-stranded RNA


@ Single-stranded RNA




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AP Biology Unit Test 1: Chemistry of Life


3. The CFTR protein is made up of 1,480 amino acids linked together in a chain. Some humans produce a
version of the CFTR protein in which phenylalanine (an amino acid) has been deleted from position 508 of
the amino acid chain.
‘Which of the following best predicts how the amino acid deletion will affect the structure of the CFTR
protein?


@ It will have no observable effect on the structure of the CFTR protein.


It will affect the primary structure of the CFTR protein, but the other levels of protein structure will not be
affected.

@ It will affect the secondary and tertiary structures of the CFTR protein, but the primary structure will not be
affected.


Wflmmmtem



4. Bacteriophages are viruses that infect bacteria. In an experiment, bacteriophages were labeled with either
radioactive phosphorus or radioactive sulfur. The labeled bacteriophages were incubated with bacteria for a
brief amount of time and then removed. The infected bacteria cells were found to contain significant
amounts of radioactive phosphorus but not radioactive sulfur.
Based on the results of the experiment, which of the following types of molecules did the bacteriophages
most likely inject into the bacteria cells?


@ Simple carbohydrate


Amino acid




@ Polypeptide




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AP Biology Unit Test 1: Chemistry of Life


5. The carbohydrates glucose, galactose, and fructose have the same chemical formula (CgHi20g) but
different structural formulas, as represented in the figure.


s g© g0 CH,OH
H—(I:—OH H—(l'J—OH ézo
HO—(|3—H HO—(l)—H HO—CID—H
H—C—OH HO—C—H H—C—OH
H—C—OH H—(l)—OH H—C—OH
| I I
CH,OH CH,OH CH,OH
Glucose Galactose Fructose
‘Which of the following statements about glucose, galactose, and fructose is most likely true?

@ The carbohydrates have the same properties because they have the same number of carbon, hydrogen, and
oxygen atoms.


The carbohydrates have the same properties because they each have a single carbon-oxygen double bond.

rrangements.of carbon, hydrogen



@ The carbohydrates have different properties because they have different numbers of carbon-carbon bonds.




g Sp1ers



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