Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 3.5, Problem 10LO
Describe the components of a
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Molecular Biology
Please help with question. thank you
You are studying the expression of the lac operon. You have isolated mutants as described below. In the presence of glucose, explain/describe what would happen, for each mutant, to the expression of the lac operon when you add lactose AND what would happen when the bacteria has used up all of the lactose (if the mutant is able to use lactose).5. Mutations in the lac operator that strengthen the binding of the lac repressor 200 fold
6. Mutations in the promoter that prevent binding of RNA polymerase
7. Mutations in CRP/CAP protein that prevent binding of cAMP8. Mutations in sigma factor that prevent binding of sigma to core RNA polymerase
Molecular Biology
Please help and there is an attached image. Thank you.
A bacteria has a gene whose protein/enzyme product is involved with the synthesis of a lipid necessary for the synthesis of the cell membrane. Expression of this gene requires the binding of a protein (called ACT) to a control sequence (called INC) next to the promoter.
A. Is the expression/regulation of this gene an example of induction or repression?Please explain:B. Is this expression/regulation an example of positive or negative control?C. When the lipid is supplied in the media, the expression of the enzyme is turned off.Describe one likely mechanism for how this “turn off” is accomplished.
Molecular Biology
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Discuss/define the following:(a) poly A polymerase (b) trans-splicing (c) operon
Chapter 3 Solutions
Biology (MindTap Course List)
Ch. 3.1 - Describe the properties of carbon that make it the...Ch. 3.1 - Define the term isomer and distinguish among the...Ch. 3.1 - Identify the major functional groups present in...Ch. 3.1 - Explain the relationship between polymers and...Ch. 3.1 - What are some of the ways that the features of...Ch. 3.1 - Prob. 2CCh. 3.1 - Prob. 3CCh. 3.1 - Prob. 4CCh. 3.1 - Prob. 5CCh. 3.2 - Distinguish among monosaccharides, disaccharides,...
Ch. 3.2 - VISUALIZE Draw simple sketches comparing the...Ch. 3.3 - Distinguish among fats, phospholipids, and...Ch. 3.3 - Prob. 1CCh. 3.3 - Explain why the structure of phospholipids enables...Ch. 3.4 - Give an overall description of the structure and...Ch. 3.4 - Prob. 8LOCh. 3.4 - Distinguish among the four levels of organization...Ch. 3.4 - Prob. 1CCh. 3.4 - Prob. 2CCh. 3.5 - Describe the components of a nucleotide. Name some...Ch. 3.5 - VISUALIZE Sketch a pyrimidine nucleotide subunit...Ch. 3.6 - Compare the functions and chemical compositions of...Ch. 3.6 - How can you distinguish a pentose sugar from a...Ch. 3 - Prob. 1TYUCh. 3 - VISUALIZE The structures depicted are (a)...Ch. 3 - Prob. 3TYUCh. 3 - The synthetic process by which monomers are...Ch. 3 - A monosaccharide designated as an aldehyde sugar...Ch. 3 - Structural polysaccharides typically (a) have...Ch. 3 - Saturated fatty acids are so named because they...Ch. 3 - Fatty acids in phospholipids and triacylglycerols...Ch. 3 - Which of the following levels of protein structure...Ch. 3 - Which of the following associations between R...Ch. 3 - Each phosphodiester linkage in DNA or RNA includes...Ch. 3 - PREDICT Do any of the amino acid side groups shown...Ch. 3 - PREDICT Like oxygen, sulfur forms two covalent...Ch. 3 - Hydrogen bonds and van der Waals interactions are...Ch. 3 - EVOLUTION LINK In what ways are all species alike...Ch. 3 - EVOLUTION LINK The total number of possible amino...Ch. 3 - EVOLUTION LINK Each amino acid could potentially...
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- Molecular Biology Please help with question. Thank you in advance. Discuss, compare and contrast the structure of promoters inprokaryotes and eukaryotes.arrow_forwardMolecular Biology Please help with question. Thank you You are studying the expression of the lac operon. You have isolated mutants as described below. In the absence of glucose, explain/describe what would happen, for each mutant, to the expression of the lac operon when you add lactose AND what would happen when the bacteria has used up all of the lactose (if the mutant is able to use lactose).1. Mutations in the lac repressor gene that would prevent the binding of lactose2. Mutations in the lac repressor gene that would prevent release of lactose once lactose hadbound3. Normally the lac repressor gene is located next to (a few hundred base pairs) and upstreamfrom the lac operon. Mutations in the lac repressor gene that move the lac repressor gene 100,000base pairs downstream.4. Mutations in the lac operator that would prevent binding of lac repressorarrow_forwardYou have returned to college to become a phylogeneticist. One of the first things you wish to do is determine how mammals, birds, and reptiles are related. Like any good scientist, you need to consider all available data objectively and without a preconceived “correct” answer. In pursuit of that, you should produce a phylogenetic tree based only on morphological features that show birds and mammals are more closely related. You will then produce a totally different tree, also using morphological features, that shows birds and reptiles are more closely related. Do not forget to include all three groups in both your trees. Based solely off the trees you produce, which relationship would you consider the more likely and why? Once you have answered that question, provide a brief summary of the “modern” understanding of the relationship between these three groups.arrow_forward
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