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A modification is made in the Gas (G alpha s) signaling pathway by the process of evolution. This modification results in negat feedback within the Gas pathway. Which of the following modifications would result in negative feedback that would attenuat (decrease) the resulting signal while the ligand activating the pathway is present? O A. The G-protein coupled receptor that activates Gas is endocytosed and degraded. O B. A target gene is transcribed that encodes for phosphodiesterase. O C. Adenylyl cyclase activates PKA D. Active PKA inhibits adenylyl cyclase.

A modification is made in the Gas (G alpha s) signaling pathway by the process of evolution. This modification results in negat feedback within the Gas pathway. Which of the following modifications would result in negative feedback that would attenuat (decrease) the resulting signal while the ligand activating the pathway is present? O A. The G-protein coupled receptor that activates Gas is endocytosed and degraded. O B. A target gene is transcribed that encodes for phosphodiesterase. O C. Adenylyl cyclase activates PKA D. Active PKA inhibits adenylyl cyclase.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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A modification is made in the Gas (G alpha s) signaling pathway by the process of evolution. This modification results in negative feedback within the Gas pathway. Which of the following modifications would result in negative feedback that would attenuate (decrease) the resulting signal while the ligand activating the pathway is present? A. The G-protein coupled receptor that activates Gas is endocytosed and degraded. B. A target gene is transcribed that encodes for phosphodiesterase. C. Adenylyl cyclase activates PKA O D. Active PKA inhibits adenylyl cyclase.
Transcribed Image Text:A modification is made in the Gas (G alpha s) signaling pathway by the process of evolution. This modification results in negative feedback within the Gas pathway. Which of the following modifications would result in negative feedback that would attenuate (decrease) the resulting signal while the ligand activating the pathway is present? A. The G-protein coupled receptor that activates Gas is endocytosed and degraded. B. A target gene is transcribed that encodes for phosphodiesterase. C. Adenylyl cyclase activates PKA O D. Active PKA inhibits adenylyl cyclase.
Histone acetyltransferases act to unwind cis-regulatory DNA sequences from histones inside the nucleus. In general, it can be said that histone acetyltransferases can: O A. allows transcriptional regulators easier access to the DNA, leading to gene phosphorylation. B. allows transcriptional regulators easier access to the DNA, leading to changes in gene expression. O C. hinders transcriptional regulator access to the DNA, leading to gene phosphorylation. O D. hinders transcriptional regulator access to the DNA, leading to changes in gene expression.
Transcribed Image Text:Histone acetyltransferases act to unwind cis-regulatory DNA sequences from histones inside the nucleus. In general, it can be said that histone acetyltransferases can: O A. allows transcriptional regulators easier access to the DNA, leading to gene phosphorylation. B. allows transcriptional regulators easier access to the DNA, leading to changes in gene expression. O C. hinders transcriptional regulator access to the DNA, leading to gene phosphorylation. O D. hinders transcriptional regulator access to the DNA, leading to changes in gene expression.
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