Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Chapter 31, Problem 2TYU
Summary Introduction
Introduction:
Auxin is the plant hormone that is responsible for promoting the coleoptiles elongation. They even have various other functions in the flowering plants. Natural auxin is called as IAA (indoleacetic acid).
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Signal transduction pathways benefit cells for all of the following reasons except :
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Chapter 31 Solutions
Campbell Biology in Focus
Ch. 31.1 - Prob. 1CCCh. 31.1 - WHAT IF? If a plant has the double mutation ctr...Ch. 31.1 - Prob. 3CCCh. 31.2 - If an enzyme in field-grown soybean leaves is most...Ch. 31.2 - WHAT IF? If a plant flowers in a controlled...Ch. 31.2 - MAKE CONNECTIONS Plants detect the quality of...Ch. 31.3 - Prob. 1CCCh. 31.3 - Prob. 2CCCh. 31.3 - Prob. 3CCCh. 31.4 - Prob. 1CC
Ch. 31.4 - Chewing insects mechanically damage plants and...Ch. 31.4 - Prob. 3CCCh. 31 - The hormone that helps plants respond to drought...Ch. 31 - Prob. 2TYUCh. 31 - Prob. 3TYUCh. 31 - Prob. 4TYUCh. 31 - Prob. 5TYUCh. 31 - Prob. 6TYUCh. 31 - DRAW IT Indicate the response of Arabidopsis to...Ch. 31 - Prob. 8TYUCh. 31 - FOCUS ON EVOLUTION As a general rule,...Ch. 31 - FOCUS ON INTERACTIONS In a short essay (100-150...Ch. 31 - Prob. 11TYU
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- A small number of cell surface receptors and low amounts of signals (ligands) can generate a large intracellular response as each step of the signal transduction pathway can be expanded by... A. gene amplification, i.e. increasing the number of target genes. B. enzyme-mediated signal amplification, e.g. phosphorylation cascades. C. the synthesis of new proteins. D. ATP Synthase, e.g. by building proton (H+) gradients.arrow_forwardPart of G1 is for the cell to enlarge, this growth can cause internal signaling from desmosomes which may stop cell division. What is the connection between desmosomes and progression of the cell cycle? Select one: a. Desmosomes are linked to the MPF. When the cell grows it will turn on the MPF through the desmosomes which will turn off the APC, stopping cell division. b. Desmosomes have nothing to do with regulating the cell cycle. c. Desmosomes are linked to microfilaments that make up the cellular cortex. When pulled, they stop kinesins from walking on microtubules, halting cell division. d. Desmosomes are connected to intermediate filaments (the skeleton of the cell). As the cell grows, if the cell receives signals (mechanical through touching) from the desmosomes that there are cells on all sides, this will halt cell division at the G1 checkpoint as part of density-dependent inhibition.arrow_forwardReceptor downregulation often occurs via endocytosis as a means of turning off a signaling pathway. How does receptor- mediated endocytosis result in turning off signaling? O A. Receptor-mediated endocytosis shuts off signaling through polyubiquitination and degradation of the receptor by the proteasome. B. It doesn't. Signaling continues until the endosome fuses with the lysosome. ) C. Signaling is shut off rapidly through the budding of endosomes into themselves forming multivesicular bodies. This sequesters the cytoplasmic tail from intracellular signaling proteins. D. Receptor-mediated endocytosis shuts off signaling by sorting receptors to recycling endosomes.arrow_forward
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