A cell is actively undergoing cell signaling. Random cytoplasm samples are taken at 10 ms intervals and their contents have all proteins inactivated. The samples are stained for phosphates attached to proteins. What pattern would you observe? Proteins maintain their phosphates throughout all of the samples There is a cycle of phosphorylation and dephosphorylation that occurs at regular intervals Proteins maintain a lack of phosphates throughout all of the samples Proteins start off being phosphorylated and then lose the phosphates

A cell is actively undergoing cell signaling. Random cytoplasm samples are taken at 10 ms intervals and their contents have all proteins inactivated. The samples are stained for phosphates attached to proteins. What pattern would you observe? Proteins maintain their phosphates throughout all of the samples There is a cycle of phosphorylation and dephosphorylation that occurs at regular intervals Proteins maintain a lack of phosphates throughout all of the samples Proteins start off being phosphorylated and then lose the phosphates

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter3: Cell Structure

Section: Chapter Questions

Problem 2DID: Organelles and Cystic Fibrosis A plasma membrane transport protein called CFTR moves chloride ions...

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Organelles and Cystic Fibrosis A plasma membrane transport protein called CFTR moves chloride ions out of cells lining cavities and ducts of the lungs, liver, pancreas, intestines, and reproductive system. Water that follows the ions creates a thin film that allows mucus to slide easily through these structures. People with cystic fibrosis (CF) have too few copies of the CFTR protein in the plasma membranes of their cells. Not enough chloride ions leave the cells, and so not enough water leaves them either. The result is thick, dry mucus that clogs the airways to the lungs and other passages. Symptoms include difficulty breathing and chronic lung infections. In 2000, researchers tracked the cellular location of the CFTR protein as it was being produced in cells from people with CF (Figure 3.13). Figure 3.13 Cellular location of the CFTR protein. Graph compares the amounts of CFTR protein found in endoplasmic reticulum, vesicles travel in g from ER to Golgi, and Golgi bodies in CF cells and normal cells. Which organelle contains the least amount of CFTR protein in normal cells? In CF cells?
Pick the two main reasons cells might undergo apoptosis 'A cell is stopped at a checkpoint, but the problems/defects cannot be fixed 'A cell needs to differentiate into a different type of cell The cell died 'Some of a cell’s proteins became glycosylated 'Some of a cell’s proteins developed disulfide bonds 'Cells that are not needed in the adult body must be removed
Which of the following utilizes receptors that are located in the cytosol? Steroid Hormone Signaling GPCR Singaling Ion channel signaling RTK Singaling
Which two processes must be balanced (one process exactly equal to the other) in order to maintain a constant number of phospholipids in a cell’s plasma membrane (neither increasing nor decreasing)? receptor-mediated endocytosis and phagocytosis “cell eating” and pinocytosis “cell drinking” and phagocytosis exocytosis and endocytosis phagocytosis and pinocytosis
You can choose one or more than one option Gap junctions in animal cells permit: Adjacent cells to adhere strongly to each other Adjacent cells to communicate. Adjacent cells to form a water-tight (occlusive) barrier between their membranes. Second messengers produced in one cell to rapidly diffuse into and stimulate events in surrounding cells. The rapid exchange of proteins such as histones between adjacent cells
Which of the following is true regarding the smooth endoplasmic reticulum (SER)? Group of answer choices It stores the second messenger, cAMP It is like the RER, it just has half the number of ribosomes associated with the cytosolic side of the membrane (it is less "rough") It is most prominent in cells that are actively secreting proteins It contains enzymes that detoxify organic compounds; it is prominent in liver cell
Glycophorins are a type of membrane protein found on red blood cells. They allow red blood cells to circulate through the blood vessels without sticking to the walls of the blood vessels or to other cells. Describe how a glycophorin protein would be synthesized by the cell. Include What parts of the cell are involved and what happens at each location. The process of protein synthesis (i.e. transcription, translation, etc).
You're studying secretion of antibodies by B-cells. B-cells are immune cells that make antibodies (antibodies are proteins) and secrete them outside of the cell (in other words, the protein is made in the cell, and is 'spit' out). Given the B-cell's role as antibody secreter what organelles do you expect to see in large amounts/volume within the cell? What type of transport is antibody secretion? Does the secretion of antibody require energy (ie., is this type of transport "active")?
Which of the following is an example of peripheral membrane protein?a) Insulin receptorb) Glycophorinc) Integrind) Glycolipid transfer proteins
Which is the definition of 'retrograde' with respect to membrane trafficking? movement from the endosome to the lysosome movement from the ER to the Golgi to either the plasma membrane or the endosome/lysosome movement from the cytoplasm to the nucleus movement from the Golgi to the ER
which cell structure would play a role in cell migration? phospholipid bilayer peripheral protein serving as an enzyme intercellular joining between two body cells integral protein serving as a carrier
The cell is triggered to make insulin when a glucose molecule binds to a receptor on the surface of the beta-cell. This then activates a molecule inside the cell to activate the expression of the gene. This process in which cells communicate with each other is called ___________ pathway (two words).

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	Proteins maintain their phosphates throughout all of the samples
	There is a cycle of phosphorylation and dephosphorylation that occurs at regular intervals
	Proteins maintain a lack of phosphates throughout all of the samples
	Proteins start off being phosphorylated and then lose the phosphates