Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 21, Problem 7TY
Summary Introduction
Introduction: Genome is defined as the complete genetic material that is present in an organism. It consists of the coding as well as the non-coding parts of DNA. The study of the genome on a large-scale is termed as genomics. This study of the genome is highly important as it provides valuable information about the organism.
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For eukaryote cells to evolve into new types of eukaryotic organisms, which of the following would one expect to occur? The correct answer is E
a) these cells have evolved because they have different DNA because of mutations
b) Their endoplasmic reticulum is synthesizing new and/or different proteins.
c) These specialized cells activate new genes to synthesize new proteins.
d) these organisms have new characteristics because they have acquired new genes.
e) all of these are true
The challenge in using sequence data to estimate the evolutionary tree for all living things is to find a gene that shows recognizable sequence similarities even between highly distantly related species . Which of the following should NOT be among the features of this gene?
A. The gene subject to strong diversifying selection.
B. It is present in all organisms.
C. It encodes a product whose function is essential.
D. The function of the gene must have remained the same in all organisms.
find an example of a set of genes that have been horizontally gene transferred between bacteria or archaea. Which organisms are the genes transferred between? Explain the set of genes that were transferred. Include what they are for and what the advantage to sharing those genes are.What do the organisms use the genes for?Which organisms the transfer happened between?What might be the advantage be to share the genes with other organisms?
Chapter 21 Solutions
Biology
Ch. 21.1 - Prob. 1CSCh. 21.1 - Prob. 1CCCh. 21.1 - Prob. 2CCCh. 21.1 - Prob. 3CCCh. 21.2 - Prob. 1CCCh. 21.2 - Prob. 2CCCh. 21.2 - Prob. 3CCCh. 21.3 - Prob. 1EQCh. 21.3 - Prob. 2EQCh. 21.3 - Prob. 3EQ
Ch. 21.4 - Prob. 1CCCh. 21.4 - Prob. 1CSCh. 21.5 - Prob. 1CSCh. 21.5 - Repetitive Sequences and Transposable Elements...Ch. 21 - Prob. 1TYCh. 21 - DNA ligase is needed in a cloning experiment a. to...Ch. 21 - Prob. 3TYCh. 21 - Why is Taq polymerase used in PCR rather than...Ch. 21 - Lets suppose you want to clone a gene that has...Ch. 21 - In the CRISPR-Cas technology for editing genes,...Ch. 21 - Prob. 7TYCh. 21 - The enzyme that helps short segments of DNA move...Ch. 21 - Prob. 9TYCh. 21 - Which of the following was not a goal of the Human...Ch. 21 - Prob. 1CQCh. 21 - Briefly describe whether or not each of the...Ch. 21 - Prob. 3CQCh. 21 - Identify and discuss three important advances that...Ch. 21 - Prob. 2COQ
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- The fact that a prokaryote has the ability to make a new protein that is placed in the cell membrane of the mesosome is important to the process of evolution because this represents a) the mutation of a gene, b) new DNA producing a new genetic variation, c) r RNA using a new type of m RNA, d) the species having a greater degree of genetic variability, e) all are truearrow_forwardA sample of bacteria is collected from soil in a field that was recently treated with pesticides. The bacteria are classified and a phylogenetic is built to illustrate the soil bacteria diversity. What kinds of characteristics would be best for creating this phylogenetic? a. rRNA gene sequence and amino acid sequence of lipase b. Cell wall structure and physical appearance c. Reproductive rate and susceptibility to pesticides d. Entire genome sequence and protein expression dataarrow_forwardWhich of the following is/are evidence that mitochondria and bacteria are descendants of bacteria? (Select all that apply.) a) The DNA structure of mitochondria and chloroplasts is similar to that of bacteria b) The DNA sequence of mitochondria and chloroplasts is similar to that of bacteria c) Mitochondria and chloroplasts have their own genomes that are not enclosed in a nuclear envelope. d) MItochondria and chloroplasts have their own ribosomes.arrow_forward
- Science fiction movies have been known to sketch out a world of the near-future where terrible things have happened such as the evolution of antibiotic resistance in flesh-eating bacteria. What might we reasonably say about this topic? (Select all that apply) A - While one can have fun with entertaining stories about evolution (including ones that are very plausible), this is not a good reason to fund research on antibiotics because that is a solved medical problem. B - It has already happened with some early antibiotics (like penicillin)-the only reason we are momentarily okay is the continued development of additional antibiotics. C - In principle, it is possible but evolution takes millions of years, so don't expect it in the near-future. D - The bodies of humans have evolved since the discovery of antibiotics such that they are less and less effective already. E - We shouldn't find antibiotic resistance to be evidence for evolution because it is only a science-fiction story: it…arrow_forwardWhich of the following does not apply to mutations?a. They occur to cause adaptive changes in response to the environment.b. They are usually either harmful or neutral.c. They are only inherited if they occur in a sperm or egg cell.d. They often occur when DNA is copied.arrow_forwardHow do scientists induce prokaryotes to produce human proteins?a. They insert human genes into bacterial genomes.b. They cross bacterial strains until the proteins arise at random.c. They inject bacteria into human muscles.d. All of the above are correct.arrow_forward
- By comparing DNA sequence of a specific gene, we can determine the evolutionary relationship of two organisms. Based on the sequence listed below, which two species would you expect to be more closely related? Organism No.1 with ATG CAA TAC GCC, organism No. 2 with ATG CAT GAC ACC and organims No. 3 with ATG CAT TAC GCC A. Organims No.2 and No.3 are likely more closely related. b.Organims No.1 and No.2 are likely more closely related. c.Organims No 1 and No.3 are likely more closely related.arrow_forwardWhat consequences does horizontal gene transfer pose for evolutionary biologists? a. It can pose difficulty in the reconstruction of phylogenetic trees, because it can obscure phylogenetic relationships. b. It can pose physiological problems in some organisms, making it very hard to study them. c. It can pose difficulty in breeding between different individuals of the same species. d. Because it is transfer of genes between the same species, it can make individuals look very more similar than they actually are. e. All of the above.arrow_forwardWhich of the following statements does not support how prokaryotes have a large amount of genetic variation A. The mutation rate in prokaryotes is not particularly high B. Prokaryotes have extremely short generation times and large populations C. They can exchange DNA with many types of prokaryotes by way of horizontal gene transfer D. They have a relatively small genomearrow_forward
- Which result from the Miller and Urey experiment provides evidence that the molecules of life could have spontaneously been produced in the ancient Earth environment? a After their experiment, they produced DNA from amino acids. b They showed how DNA can be produced from simple molecules that included water, oxygen, carbohydrates, and lipids. c Their experiment produced amino acids—the building blocks of life—from chemicals that existed in the environment of ancient Earth. d Miller and Urey's experiment provided evidence that showed that although oxygen was lacking in the environment of ancient Earth, it could be readily made from the decomposition of rocks and minerals.arrow_forwardWould a protein encoded on the core genome or one encoded only on the pan-genome be best to use in constructing a phylogenetic tree? Explain your answerarrow_forwardThe Selfish Gene is a radical theory that argues that all living creatures are essentially vehicles for their genes- hence, we all are a “survival machine" for our genes. In the light of what you have learned about the molecular structure and function of the gene, is this perspective still relevant? Cite specific biological phenomena to prove your point.arrow_forward
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