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1. Which of the following is NOT the function of lysosome? a) uses proteins on its...
34. Which of the following membrane-enclosed organelles is the site of synthesis of membrane proteins and secretory proteins? a) rough endoplasmic reticulum b) smooth endoplasmic reticulum c) nucleus d) centrosome e) Golgi complex 35. Which of the following membrane-enclosed organelles modifies, s destined for other regions of the cell? sorts, and packages proteins a) endoplasmic reticulum b) Golgi complex c) peroxisomes d) nucleus e) proteasome 36. Which of the following membrane-enclosed organelles contains several oxidases that are involved in oxidation of fatty acids and...
Which of the following organelles is correctly paired with its function? a. smooth endoplasmic reticulum; metabolism of lipids b. lysosome; protein synthesis c. golgi apparatus; produce energy for the cell d. mitochondrion; packaging proteins and lipids
Which one of the following statements is false? A. rough endoplasmic reticulum (RER) does not contain ribosomes on its surface and is involved in phospholipid synthesis B. an organelle is a specialized structure with specific cellular functions C.the secretory pathway explains the movement of secretory proteins from the endoplasmic reticulum to the Golgi apparatus D. the signal sequence is cleaved by signal peptidase and released into the ER lumen E.signal recognition particles are composed of proteins and RNA that binds to signal sequences and targets...
Test yourself Many cell surface trans membrane proteins, called glycoproteins, have an attached carbohydrate group, 1. ich faces the extracellular space. This carbohydrate group is attached to the protein when it is still in the rER. Is the carbohydrate attached to the side of the protein that faces the lumen of the rERo the cytosol 2.Explain why the orientation of a transmembrane protein (i.e. which side of the protein faces the inside and which side faces the outside of the...
Which of the following can NOT be digested in lysosome? a. mitochondrion in a starved cell b. unwanted proteins in cytosol c. bacterium eaten by a phagocytic cell d. LDL taken by a cell
Which of the following statements correctly matches a membrane
protein with its function.
-Structural proteins bind to molecules to facilitate entry to
or exit from the cell.
-Carrier proteins form water-filled channels that allow
molecules to pass through.
-Channel proteins are classified as uniport, symport, or
antiport carriers.
-Receptors transmit signals from the extracellular environment
to the cytoplasm of the cell.
During the cephalic phase of gastric secretion,
-there is an increased flow of action potentials along the
vagus nerve...
Which of the following statements about the role of the COPI or COPII proteins in vesicular transport is CORRECT? They pinch and fuse the membrane to allow separation of the vesicle from the rest of the membrane of the donor compartment. They increase the curvature of the membrane and form the vesicle from the donor compartment. They bind to the membrane of the target organelle/compartment to ensure delivery specificity. They regulate the fusion of the vesicle membrane with its target...
The liver is involved in detoxification of many poisons and drugs. Which of the following structures is primarily involved in this process and therefore abundant in liver cells? A) rough ER B) smooth ER C) Golgi apparatus D) nuclear envelope E) transport vesicles Which of the following produces and modifies polysaccharides that will be secreted? A) lysosome B) vacuole C) mitochondrion D) Golgi apparatus E) peroxisome Which organelle often takes up much of the volume of a plant cell? A)...
i opis) For the following organelles, please provide: 0 One function of the organelle ("ine receptor protein(s) that help recognize proteins that are to be delivered to the organelle. A. ER B. Golgi C. Lysosome
SDS-PAGE is often used to determine the location and orientation of membrane associated proteins. Commonly, experimental preparations of membranes are treated in a variety of ways in order to extract the proteins, which are then subjected to SDS-PAGE. These treatments will affect membrane proteins in different ways, based on how they are arranged in the membrane. One of the most common pre-treatments is by the digestive enzyme trypsin, which degrades polypeptide chains. Trypsin is too large to cross a membrane,...