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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Chapter 16, Problem 18TYK
Which of the following statements about telomeres is correct?
- a. They are ever-shortening tips of chromosomes that may signal cells to stop dividing at maturity.
- b. They are highly repetitive sequences at the tips of chromosomes that protect the leading strand during replication.
- c. They are enzymes in germ cells that allow these cells to undergo repeated divisions.
- d. All of the above are correct.
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Students have asked these similar questions
Which of the following is true about the enzyme telomerase?
A. It is found only in adult cells.
B. It is responsible for telomere shortening.
C. It can re-establish telomere length.
D. It may speed up the aging process.
E. It is expressed at low levels in cancer cells.
Many chromosomes have structures called telomeres at each end. Mark all the TRUE statements about telomeres below.
Mark all that apply.
Select one or more:
a.
Telomeres protect the ends of the chromosomes
b.
Telomeres hold sister chromatids together after replication
c.
Human telomeres consist of a specific base sequence (TTAGGG) repeated about 2500 times
d.
Telomeres are present in all prokaryotes and eukaryotes
The chromatin is composed of...
a. DNA (10%), RNA (30%), and histone proteins (60%)b. DNA (30%), RNA (30%), and histone proteins (40%)c. DNA (60%), RNA (30%), and histone proteins (10%)d. DNA (30%), RNA (10%), and histone proteins (60%)e. none of the above
Chapter 16 Solutions
Study Guide for Campbell Biology
Ch. 16 - Hershey and Chase devised an experiment using...Ch. 16 - Review the structure of DNA by labeling the...Ch. 16 - Using different colors for heavy (parental) and...Ch. 16 - Look back to Interactive Question 16.2 and label...Ch. 16 - In this diagram of bacterial DNA replication,...Ch. 16 - Draw the last Okazaki fragment being formed on the...Ch. 16 - List the successive levels of packing in a...Ch. 16 - Prob. 1SYKCh. 16 - Prob. 2SYKCh. 16 - One of the reasons most scientists thought...
Ch. 16 - Transformation involves a. the uptake of external...Ch. 16 - Prob. 3TYKCh. 16 - Which of the following most closely represents...Ch. 16 - Prob. 5TYKCh. 16 - Prob. 6TYKCh. 16 - In their classic experiment, Meselson and Stahl a....Ch. 16 - The joining of nucleotides in the polymerization...Ch. 16 - DNA polymerase is not able to begin copying a DNA...Ch. 16 - Prob. 10TYKCh. 16 - Prob. 11TYKCh. 16 - Prob. 12TYKCh. 16 - Which of the following is least related to the...Ch. 16 - Prob. 14TYKCh. 16 - Prob. 15TYKCh. 16 - Prob. 16TYKCh. 16 - Prob. 17TYKCh. 16 - Which of the following statements about telomeres...Ch. 16 - You are trying to test your hypothesis that DNA...Ch. 16 - Given the experimental procedure explained in...Ch. 16 - Prob. 21TYKCh. 16 - Biologists have learned from the technique of...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following is the most likely effect of a mutation in the gene coding for a DNA repair enzyme? a.The mutated gene will not be transcribed because RNA polymerase cannot transcribe mutated DNA. b.Mutations will accumulate more quickly because the cell will not be able to fix errors in replication. c.The cell will immediately undergo apoptosis so that mutated DNA is not replicated in future rounds of cell division. d.The cell containing the mutation will divide more frequently because the cell cycle checkpoints will not function properly.arrow_forwardHow is homologous recombination for DNA repair different from recombination in meiosis? Choose all correct answers. a. HR in DNA repair requires a double-strand break, but meiotic recombination does not. b. HR in DNA repair requires strand invasion, but meiotic recombination does not. c. HR in DNA repair results in identical chromosomes. Meiotic recombination results in changes to the DNA sequence of the "repaired" chromosomes. d. HR in DNA repair uses a newly synthesized identical chromosome as a template. Meiotic recombination uses a homologous chromosome as a template.arrow_forwardCancer cells can divide much longer than most other cells. One possible reason is the presence of telomerase in cancer cells. How might telomerase aid cancer cells? A. It proofreads the telomere sequences. B. It increases the length of the telomeres. C. It decreases the length of the telomeres. D. It stabilizes the bonds in the telomeres.arrow_forward
- The numbered events listed below participate in the generation of junctional diversity. Put them in chronological order. a. DNA strands pair, and unpaired nucleotides are removed by exonuclease activity. b. P-nucleotides are generated after nicking of one DNA strand. c. DNA polymerase fills in gaps, and DNA ligation forms a coding joint. d. The RAG complex cleaves heptamer RSSs, and DNA hairpins are formed. e. Terminal deoxynucleotidyl transferase adds N-nucleotides to the 3ʹ end of the stretch of P-nucleotides.arrow_forwardWhich of the following is evidence for the natural existence of Z-DNA?: A. Z-DNA is a right handed helix like B-DNA B. Specific Z-DNA binding proteins have been identified C. Z-DNA is prevalent in sex chromosomes D. Z-DNA forms under high salt conditions E. Z-DNA is tightly coiled in nucleosomesarrow_forwardWhat is a main difference between onion root tip (plant cell) mitosis and whitefish blastula (animal cell) mitosis? A. The DNA is animal cells is inside of a nucleus but there is no nucleus in plant cells. B. A cleavage furrow is not formed in plant cells due to the rigid cell wall. C. Plant cells do not have DNA and animal cells do. D. Plant cells have undergo prophase where they condense their chromosomes but animal cells skip this step.arrow_forward
- Which of the following statements about genes is incorrect? Select one: O a. During fertilization, both the sperm and the ovum contribute genes to the resulting fertilized egg. b. Genetic differences can result from changes in the DNA called mutations. O c. Genes correspond to segments of DNA. d. Under normal circumstances, each chromosome contains precisely one gene. e. Many genes contain the information needed for cells to synthesize enzymes and other proteins.arrow_forwardA research laboratory uses a cancer cell line that has undergone thousands of cell cycle divisions in the laboratory without any change in the length of its chromosomes. The most likely reason the chromosomes aren’t shortening is that the cancer cells are expressing Select one: a. very low levels of telomerase. b. high levels of telomerase. c. high levels of RNA polymerase. d. DNA polymerases with high fidelity. e. high levels of ligase activity.arrow_forwardWith regard to human cancer cells, which of the following statements is true? A. Cancer cells within one tumor usually do not share common mutations B. Cancer cells generally have lost the ability to divide C. Oncogenes are non-human genes not related to normal genes in the human genome D. Mutations in DNA repair genes result in an increased chance of getting cancer.arrow_forward
- Which of the following statements about chromosomes and centromeres is INCORRECT?(choose the letter that corresponds to the answer) A. A centromere is a constriction visible on metaphase chromosomes. B. Centromere position is a useful marker for dividing chromosomes into karyotype groups. C. Centromeric protein-A replaces histone H3 in nucleosomes found at the centromere. D. Acentric and dicentric chromosomes are genetically stable chromosomes.arrow_forwardWhich of the following is the main reason why DNA must exist in chromosome form? a.)To favor the formation of sister chromatids b.)To allow the protein histones to carry out its task c.)To avoid the genetic material to be tangled away during cell division d.)To promote the formation of spindle fibersarrow_forwardWhich of the following represents the order of increasingly higher levels of organization of chromatin? Select one: O a. looped domain, nucleosome, 30-nm chromatin fiber O b. 30-nm chromatin fiber, nucleosome, looped domain C. nucleosome, looped domain, 30-nm chromatin fiber O d. looped domain, 30-nm chromatin fiber, nucleosome nucleosome, 30-nm chromatin fiber, looped domain е.arrow_forward
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