What is cell signalling Study guides, Class notes & Summaries
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OCR A-Level Biology - Modules 1-4 Correctly Answered Questions 2024.
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OCR A-Level Biology - Modules 1-4 Correctly Answered Questions 2024. 
 
 
why do specimens need to be thin when observing them under a light microscope? - CORRECT ANSWER to allow light to pass through 
 
identify and explain the starch test - CORRECT ANSWER add iodine dissolved in potassium iodide solution to the sample 
- positive test = blue-black 
- negative test = orange-brown 
 
why is the structure of the plasma membrane often referred to as the fluid mosaic model? - CORRECT ANSWER - the c...
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Exam 3 BIO 362 Creighton University (Parts 3 and 4)Questions and Answers with complete solution
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1) What is desensitization? 
2) What kind of cell receptors can this happen to? - Answer-1) When a cell decreases the amount of 
receptors on its surface to decrease the amount of response that the cell has to a ligand/stimulus 
2) Can happen to any cell surface signalling receptor 
How is the endocytic pathway mediated? - Answer-Clathrin based endocytosis 
Describe the endocytic pathway in a stepwise fashion - Answer-1) Plasma membrane breaks off into free 
floating vesicles in the cytoplasm 
2...
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CPPS 325 FINAL EXAM questions with correct answers
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What are the 5 well-known enzyme-linked cell surface receptors? Answer 1. Receptor Guanylyl Cyclase: produces cGMP 
2. RTK: phosphorylate tyrosine residues leading to association of signalling molecules and cascade 
3. TK Associated Receptors: associate with proteins having TK activity 
4. Receptor Tyrosine Phosphates: Removes phosphate on tyrosine residues 
5. Receptor Serine/Threonine Kinases: phosphorylate specific Serine/Threonine residues on IC signalling molecules 
 
How are RTK and TK A...
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CPPS 325 FINAL EXAM
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What are the 5 well-known enzyme-linked cell surface receptors? - Answer- 1. Receptor Guanylyl Cyclase: produces cGMP 
2. RTK: phosphorylate tyrosine residues leading to association of signalling molecules and cascade 
3. TK Associated Receptors: associate with proteins having TK activity 
4. Receptor Tyrosine Phosphates: Removes phosphate on tyrosine residues 
5. Receptor Serine/Threonine Kinases: phosphorylate specific Serine/Threonine residues on IC signalling molecules 
 
How are RTK and T...
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PCB 3233 EXAM 2 Questions And Answers Graded A+
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What are the external TLRs - TLR-5:Bacterial Flagellin 
TLR-4:Bacterial LPS 
TLR-3 recognizes? - Double stranded Viral RNA 
TLR-7 recognizes? - Single stranded Viral RNA 
TLR-5 recognizes? - bacterial flagellin 
TLR-4 recognizes? - Bacterial LPS 
Leukocytes in the order to action - 1. Neutrophils - Mass quantities 
2. Monocytes 
3.Lymphocytes - days later 
2 cell type recognition - 1. NK - looking at your own cells 
2. Macrophages - looking at pathogen directly 
Macrophages - use toll like recep...
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CPPS 325 FINAL EXAM QUESTIONS WITH 100 % CORRECT ANSWERS
- Exam (elaborations) • 17 pages • 2024
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What are the 5 well-known enzyme-linked cell surface receptors? 1. Receptor Guanylyl Cyclase: produces cGMP 
2. RTK: phosphorylate tyrosine residues leading to association of signalling molecules and cascade 
3. TK Associated Receptors: associate with proteins having TK activity 
4. Receptor Tyrosine Phosphates: Removes phosphate on tyrosine residues 
5. Receptor Serine/Threonine Kinases: phosphorylate specific Serine/Threonine residues on IC signalling molecules 
 
How are RTK and TK Associat...
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CPPS 325 FINAL EXAM 2023 WITH 100% CORRECT ANSWERS
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What are the 5 well-known enzyme-linked cell surface receptors? - correct answer1. Receptor Guanylyl Cyclase: produces cGMP 
2. RTK: phosphorylate tyrosine residues leading to association of signalling molecules and cascade 
3. TK Associated Receptors: associate with proteins having TK activity 
4. Receptor Tyrosine Phosphates: Removes phosphate on tyrosine residues 
5. Receptor Serine/Threonine Kinases: phosphorylate specific Serine/Threonine residues on IC signalling molecules 
 
How are RTK...
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PNB 3255 Exam I Questions and Answers Already Passed
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PNB 3255 Exam I Questions and Answers Already Passed Nervous system is ___% of human body weight 3% or ~4.5 lbs 
The CNS includes: Brain, spinal cord, and retina 
The PNS includes: Neurons outside the CNS, cranial / spinal nerves, ganglia 
Autonomic nervous system controls: Visceral functions such as heart rate, digestion, salivation, respiration 
CNS development begins at what day of intrauterine development? Day 22 
Describe the process of CNS formation. The nervous system develops from the ne...
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BIOL 1P91 – Final EXAM .OVER 280 QUESTIONS WITH VERIFIED CORRECT ANSWERS
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BIOL 1P91 – Final EXAM .OVER 280 
QUESTIONS WITH VERIFIED CORRECT 
ANSWERS 
Holds the cell together and controls what goes in and out - 
ANSWER cell membrane 
separates cell contents from the surrounding environment - 
ANSWER plasma membrane 
uptake and export of ions and molecules, cell 
compartmentalization, protein storing, anchoring cytoskeleton, 
production of ATP and NADPH, cell signalling, cell and nuclear 
division, and adhesion of cells to each other and to the 
extracellular...
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BIOL 1P91 – Final EXAM .OVER 280 QUESTIONS WITH VERIFIED CORRECT ANSWERS
- Exam (elaborations) • 26 pages • 2023
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BIOL 1P91 – Final EXAM .OVER 280 
QUESTIONS WITH VERIFIED CORRECT 
ANSWERS 
Holds the cell together and controls what goes in and out - 
ANSWER cell membrane 
separates cell contents from the surrounding environment - 
ANSWER plasma membrane 
uptake and export of ions and molecules, cell 
compartmentalization, protein storing, anchoring cytoskeleton, 
production of ATP and NADPH, cell signalling, cell and nuclear 
division, and adhesion of cells to each other and to the 
extracellular...
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