Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 24, Problem 14RQ
What term describes the close association of a
- a rhizoid
- a lichen
- a mycorrhiza
- an endophyte
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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
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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.
Chapter 24 Solutions
Biology 2e
Ch. 24 - Figure 24.14 Which of the following statements is...Ch. 24 - Figure 24.17 Which of the following statements is...Ch. 24 - Figure 24.21 If symbiotic fungi are absent from...Ch. 24 - Which polysaccharide is usually found in the cell...Ch. 24 - Which of these organelles is not found in a fungal...Ch. 24 - The wall dividing individual cells in a fungal...Ch. 24 - During sexual reproduction, a homothallic mycelium...Ch. 24 - The life cycles of perfect fungi are most similar...Ch. 24 - The most primitive phylum of fungi is the...Ch. 24 - Members of which phylum produce a club shaped...
Ch. 24 - Members of which phylum establish a successful...Ch. 24 - The fungi that do not reproduce sexually used to...Ch. 24 - A scientist discovers a new species of fungus that...Ch. 24 - What term describes the close association of a...Ch. 24 - Why are fungi important decomposers? They produce...Ch. 24 - Consider an ecosystem where all the fungi not...Ch. 24 - A fungus that climbs up a tree reaching higher...Ch. 24 - A fungal infection that affects nails and skin is...Ch. 24 - The targets for anti-fungal drugs are much more...Ch. 24 - Yeast is a facultative anaerobe. This means that...Ch. 24 - The advantage of yeast cells over bacterial cells...Ch. 24 - Why are fungal insecticides an attractive...Ch. 24 - What are the evolutionary advantages for an...Ch. 24 - Compare plants, animals, and fungi, considering...Ch. 24 - Why is the large surface area of the mycelium...Ch. 24 - What is the advantage for a basidiomycete to...Ch. 24 - For each of the four groups of perfect fungi...Ch. 24 - Why does protection from light actually benefit...Ch. 24 - Ambrosia bark beetles carry Amb/os/e//a fungal...Ch. 24 - Ecologists often attempt to introduce new plants...Ch. 24 - Why can superficial mycoses in humans lead to...Ch. 24 - Explain how the Red Queen Hypothesis describes the...Ch. 24 - Historically, artisanal breads were produced by...Ch. 24 - How would treating an area of a forest with a...
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