Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 1SYK
About 25% of the human genome relates to the production of proteins or RNA products (exons, introns, or regulatory sequences). Is the remaining 75% just “junk”? Describe the following types of noncoding DNA, including some of their possible functions.
a. transposable elements
b. Alu elements
c. L1 sequences
d. simple sequence DNA
e. pseudogenes
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In the table below, there are four versions of gene A, one of which is normal, and the
other three which contain mutations that make the gene product nonfunctional.
Focus on the shaded region of the sequence. Use the genetic code table to answer
the question.
How would you describe Mutation #2?
Partial DNA sequence for gene A ("..." indicates many nucleotides of sequence not
shown)
5' ... ATG GTG AGC AAG GAG GAG CTG TTC ACC TGT AAA TAG ...
Normal
Mutation #1
5' ... ATG GTG AGC AAG GAG AAG CTG TTC ACC TGT AAA TAG ...
Mutation #2
5' ... ATG GTG AGC AAG TAG GAG CTG TTC ACC TGT AAA TAG ...
Mutation #3
5' ... ATG GTG AGC AAG GAG CTG TTC ACC TGT AAA TAG ...
Silent mutation
Nonsense mutation
Frameshift mutations
Missense mútation
List the four types of noncoding DNA (see Section 27.2). Give the function of each, if it is known.
One of the following is a characteristic of eukaryotic genetic material?
1. Eukaryotic genetic material is compacted by wrapping the double-helix around histone proteins to form nucleosomes.
2. Eukaryotic genetic material consists of supercoiled circular DNA molecules complexed with proteins into chromosomes.
3. Eukaryotic genetic material consists of relaxed linear DNA molecules complexed with RNA into a 30 nm fiber.
4. Eukaryotic genetic material is compacted by folding linker regions around non-histone proteins to form a scaffold.
Chapter 21 Solutions
Study Guide for Campbell Biology
Ch. 21 - In what ways would third-generation sequencing be...Ch. 21 - Prob. 2IQCh. 21 - Refer to the organisms listed in Table 21.1 in...Ch. 21 - Explain why retrotransposons always move by the...Ch. 21 - For each of the following types of DNA sequences...Ch. 21 - Prob. 6IQCh. 21 - Prob. 7IQCh. 21 - If all Hox genes contain the same or very similar...Ch. 21 - About 25% of the human genome relates to the...Ch. 21 - Prob. 2SYK
Ch. 21 - Which of the following has decreased the time and...Ch. 21 - Prob. 2TYKCh. 21 - In the process called gene annotation, computer...Ch. 21 - Prob. 4TYKCh. 21 - Prob. 5TYKCh. 21 - Prob. 6TYKCh. 21 - What is a pseudogene? a. a gene that has been...Ch. 21 - Prob. 8TYKCh. 21 - Which of the following is common to both...Ch. 21 - Prob. 10TYKCh. 21 - Prob. 11TYKCh. 21 - Prob. 12TYKCh. 21 - Prob. 13TYKCh. 21 - Prob. 14TYKCh. 21 - Compared to genes in mice and chimpanzees, most...
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