1. Proteins of the cell membrane are the most important (drug receptors/drug agonists). Which is correct?
1. Proteins of the cell membrane are the most important (drug receptors/drug agonists). Which is correct?
Embedded cell membrane proteins are some of the most important proteins a cell produces. An important disease involves the malfuction of one of these proteins. This disease causes green slime to accumulate in the lungs and digestive system, leading to malnutrition and frequent pneumonias. What is the name of this disease? Cystic fibrosis Neurofibromatosis Pancreatitis Alzheimer's disease Name the high energy yield process that degrades lipids in peroxisomes. Beta-oxidation cycle Lactic acid fermentation Citric acid cycle e Dehydrogenation D Question...
Membrane-bound receptors are an important component facilitating some types of cellular communication; however, not all signal-receptor binding occurs outside the cell membrane. Some signal molecules are able to pass through the plasma membrane, and their receptors are intracellular. In a theoretical lab study, scientists work to design a lab experiment that would inhibit some molecules’ ability to bind with their intracellular receptors. (a) Draw conclusions about the structure and function of membrane proteins. (b) Identify some molecules that are able...
21. Which property has not been observed for membrane proteins? a. energy storage b. transport of substances into and out of the cell catalysis (enzymatic activity) acting as a receptor c. d. 22. In the fluid mosaic model of membrane structure the proteins are specifically bonded to the lipids b. a. the proteins "float" in the lipid bilayer the proteins are sandwiched between the lipid molecules c. d. the lipids are sandwiched between the protein molecules 23. All steroids contain...
Which of the following is not a function of peripheral proteins? A) mechanical support for membrane B) enzymes C) receptors D) anchor for integral proteins E) factors that transmit transmembrane signals
receptors for hydrophilic ligands are found where? on the plasma membrane or inside the cell?
GTP-coupled receptors bind and interact with intracellular proteins. These proteins, in turn, each have a specific response in cell signaling. Place the description on the correct location of GPCR signaling. 1st attempt See Hint Plasma membrane GDP GDP GTP GDP leaves and exchanges with GTP, leading to subunit dissociation Ligand occupancy of receptor causes a twist in the transmembran e loops, opening the GTP/GDP pocket of the alpha subunit Inactive heterotrimeric G protein bound to GDP Beta/gamma subunits remain as...
Which of the following molecules would be most likely to cross the cell membrane without assistance from embedded proteins? potassium ion (K+) sodium ion (Na+) Vitamin D. a fat soluble vitamin glucose
1. How does the cell membrane affect homeostasis (i.e., actively maintaining a stable internal environment) in the cell? (select ALL accurate statements) A) the cell membrane prevents charged ions, and (most) large, polar molecules from entering B) the cell membrane allows some molecules to enter freely C) the cell membrane prevents nonpolar molecules from entering the cell D) the cell membrane is a selective barrier 2. The cell plasma membrane has integral and peripheral proteins in the phospholipid bilayer. These...
HIV, the virus which causes AIDS, interacts with two receptors on the host cell membrane: CD4 and CCR5. A small percentage of individuals have a genetic mutation which causes their cells to lack CCR5. These individuals will never develop AIDS nor are they able to pass HIV on to others. Which part of viral replication is being blocked by the lack of a receptor? Select one: o a. Newly assembled virions cannot be released from the host cell. O b....
teins that pump hydrogen ions into the stomach. Another is the antidepress drug fluoxetine (Prozac), which prevents receptors on brain cell surfaces f absorbing a mood-altering biochemical called serotonin. 3.3 Mastering Concepts 1. How does the chemical structure of phospholipids enable them to form a bilayer in water? 2. Where in the cell do phospholipid bilayers occur? 3. What are some functions of membrane proteins? 4. How does a cell membrane differ from a cell wall? The Cytoskeleton Supports Eukaryotic...