Which is NOT a function of intracellular signaling molecules? A). Amplification of signal. B). Allows for...
Which is NOT a function of intracellular signaling molecules?
A). Amplification of signal.
B). Allows for cross-talk and fine tuning of intracellular signaling.
C). Activation of enzymes that can alter cellular metabolism.
D). Activation of transcription factors that increases gene expression.
E). All of the above.
Homework Answers
Answer
Option C is the right answer because activation of the enzyme in signal transduction pathway cannot alter cellular metabolism rather generate the secondary messenger of phosphorylating the target protein to modulate the gene expression or alter the cell polarity.
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Which is NOT a function of intracellular signaling
molecules?
A). Amplification of signal.
B). Allows for...
Signal amplification is an essential step in signal transduction. Which of the following steps of signal...
Signal amplification is an essential step in signal transduction. Which of the following steps of signal transduction amplify the signal (select all that apply)? Group of answer choices a) ligand binding to receptor b) release of GTP bound form of G protein from receptor c) binding of GTP bound form of G protein to target enzyme d) generation of second messenger by activated target enzyme e) activation of gene expression
32. Study the signaling pathway illustrated below, which involves two different receptors. Assume that a protein...
32. Study the signaling pathway illustrated below, which involves two different receptors. Assume that a protein is active only when it is activated, but not inhibited, by its upstream signaling molecules. Activation and inhibition are indicated by normal and blunt arrows, respectively. Assume that the transcription regulator can be activated by either the binding protein or the kinase that are immediately upstream of the transcription factor. Under which of the following conditions will the expression of target:gene "X" be induced?...
Question 3 (1 point) Which of the following correctly describes how expression or function of MYC...
Question 3 (1 point) Which of the following correctly describes how expression or function of MYC happens? (Don't worry about correct capitalization or type style in this question.) O A chromosomal translocation that puts an active promoter region for antibody genes in close proximity to the myc gene, leading to overproduction of MYC. The avian myelocytomatosis virus carries an altered version of myc (v-myc) that is hyperactive. The virus genome integrates into the host genome and the altered form of...
Yet, all the cells in your body contain the same genes (and same alleles). The difference...
Yet, all the cells in your body contain the same
genes (and same alleles). The difference across cell types
is that genes get selectively expressed (turned on or off)
based on the proteins needed for cellular function given their
environment.
Select which statement explains the reason why hair does not
normally grow on your muscle cells.
a.
Muscle cells have the gene for keratin, but do not express
it
b.
Muscle cells do not have the gene for keratin and...
need to know correct answers 26. B. Which of the following enzymes is associated with the...
need to know correct answers
26. B. Which of the following enzymes is associated with the repression of transcription? methyl transferase DNA polymerasex acetyl transferase histone kinase none of the above Section 2 - True/False (2 points each) 27. TFIIB regulates tissue or cell type-specific transcription 28._1 Eukaryotes have three different RNA polymerases that each can transcribe non-protein coding genes. 29. T The P site of the ribosome refers to peptidyl. be For T heoph UND 30._F_The input genetic material...
Question 8 0.5 pts Which of the following statements is false as it pertains to gene...
Question 8 0.5 pts Which of the following statements is false as it pertains to gene expression? O External cues have no impact on gene expression. O Specialized cells in a multi-cellular organism are capable of altering their patterns of gene expression in response to extracellular cues. O Different cell types can respond in different ways to the same extracellular signal. o Cortisol signals liver cells to boost the production of glucose. o Cortisol signals induce fat cells to reduce...
Help with these bio questions please.Thank you 1 Secretory protein leave the cell by b Exoctossthey...
Help with these bio questions please.Thank you
1 Secretory protein leave the cell by b Exoctossthey remain in the cytoplasm c) pinocytosis d) receptor mediated 2 If proteins lack a c) Ras d) Signal-recognition particle b) Sorting signal 3 What purpose does the protein coat serve a) Capture molecules to remain in the cytosol b) Shapes the membrane into a phospholipid bilayer membrane c) Provides extra protection and support to the organelles d) none of these are correct cells response...
Section 12.3 20) Which process is NOT a feature of visual signal transduction? e. activation of...
Section 12.3 20) Which process is NOT a feature of visual signal transduction? e. activation of a cGMP phosphodiesterase 1. replacement of all-trans-retinal catalyzed by transducin 8. light absorption by 11-cis-retinal h. change in cell membrane potential Section: 12.3 GPCRs in Vision, Olfaction, and Gustation Section 12.4 21) Receptor tyrosine kinases: e. are dimers. f. do not regulate gene expression. 8. engage in extensive cross talk with other signal transduction systems. h. bind insulin. Section: 12.4 Receptor Tyrosine kinases Section...
6. Lipid-soluble signaling molecules, such as testosterone, cross the plasma membranes of all cells A) by...
6. Lipid-soluble signaling molecules, such as testosterone, cross the plasma membranes of all cells A) by diffusion but affect only target cells because only target cells retain the appropriate DNA segments. B) by diffusion but affect only target cells because only target cells have the intracellular receptors for testosterone. C) through hydrophilic channels of transmembrane proteins but affect only target cells because only target cells retain the appropriate DNA segments. D) through hydrophilic channels of transmembrane proteins but affect only...
1. What are the different sources of energy available to living organisms? 2. How do the...
1. What are the different sources of energy available to living organisms? 2. How do the acquisition and the use of energy by living organisms work according to the laws of thermodynamics? 3. Explain the energy use in the following reactions: endergonic/exergonic. 4. What is metabolism? How are chemical reactions related to metabolism? Why is energy needed to run a metabolism? What are coupled reactions? 5. Draw a picture of ATP. Why is this molecule so important for cells? How...
32. Study the signaling pathway illustrated below, which involves two different receptors. Assume that a protein is active only when it is activated, but not inhibited, by its upstream signaling molecules. Activation and inhibition are indicated by normal and blunt arrows, respectively. Assume that the transcription regulator can be activated by either the binding protein or the kinase that are immediately upstream of the transcription factor. Under which of the following conditions will the expression of target:gene "X" be induced?...
Question 3 (1 point) Which of the following correctly describes how expression or function of MYC happens? (Don't worry about correct capitalization or type style in this question.) O A chromosomal translocation that puts an active promoter region for antibody genes in close proximity to the myc gene, leading to overproduction of MYC. The avian myelocytomatosis virus carries an altered version of myc (v-myc) that is hyperactive. The virus genome integrates into the host genome and the altered form of...
Yet, all the cells in your body contain the same
genes (and same alleles). The difference across cell types
is that genes get selectively expressed (turned on or off)
based on the proteins needed for cellular function given their
environment.
Select which statement explains the reason why hair does not
normally grow on your muscle cells.
a.
Muscle cells have the gene for keratin, but do not express
it
b.
Muscle cells do not have the gene for keratin and...
need to know correct answers
26. B. Which of the following enzymes is associated with the repression of transcription? methyl transferase DNA polymerasex acetyl transferase histone kinase none of the above Section 2 - True/False (2 points each) 27. TFIIB regulates tissue or cell type-specific transcription 28._1 Eukaryotes have three different RNA polymerases that each can transcribe non-protein coding genes. 29. T The P site of the ribosome refers to peptidyl. be For T heoph UND 30._F_The input genetic material...
Question 8 0.5 pts Which of the following statements is false as it pertains to gene expression? O External cues have no impact on gene expression. O Specialized cells in a multi-cellular organism are capable of altering their patterns of gene expression in response to extracellular cues. O Different cell types can respond in different ways to the same extracellular signal. o Cortisol signals liver cells to boost the production of glucose. o Cortisol signals induce fat cells to reduce...
Help with these bio questions please.Thank you
1 Secretory protein leave the cell by b Exoctossthey remain in the cytoplasm c) pinocytosis d) receptor mediated 2 If proteins lack a c) Ras d) Signal-recognition particle b) Sorting signal 3 What purpose does the protein coat serve a) Capture molecules to remain in the cytosol b) Shapes the membrane into a phospholipid bilayer membrane c) Provides extra protection and support to the organelles d) none of these are correct cells response...
Section 12.3 20) Which process is NOT a feature of visual signal transduction? e. activation of a cGMP phosphodiesterase 1. replacement of all-trans-retinal catalyzed by transducin 8. light absorption by 11-cis-retinal h. change in cell membrane potential Section: 12.3 GPCRs in Vision, Olfaction, and Gustation Section 12.4 21) Receptor tyrosine kinases: e. are dimers. f. do not regulate gene expression. 8. engage in extensive cross talk with other signal transduction systems. h. bind insulin. Section: 12.4 Receptor Tyrosine kinases Section...
6. Lipid-soluble signaling molecules, such as testosterone, cross the plasma membranes of all cells A) by diffusion but affect only target cells because only target cells retain the appropriate DNA segments. B) by diffusion but affect only target cells because only target cells have the intracellular receptors for testosterone. C) through hydrophilic channels of transmembrane proteins but affect only target cells because only target cells retain the appropriate DNA segments. D) through hydrophilic channels of transmembrane proteins but affect only...
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