Which of the following statements best describes the "fluid mosaic model" of the structure of the cell membrane? OA single layer of protein on the outside and a single layer of lipids on the inside Two layers of lipid with proteins between the lipid layers Two layers of protein with lipid layers between the protein layers A double layer of lipid molecules with protein molecules suspended in the layer

Which of the following statements best describes the "fluid mosaic model" of the structure of the cell membrane? OA single layer of protein on the outside and a single layer of lipids on the inside Two layers of lipid with proteins between the lipid layers Two layers of protein with lipid layers between the protein layers A double layer of lipid molecules with protein molecules suspended in the layer

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 7SQ

See similar textbooks

Similar questions

The plasma membrane __________. a. surrounds the cytoplasm b. separates the nucleus from the cytoplasm c. separates the cell interior from the environment d. both a and c
Cell membranes consist mainly of a _________. a. carbohydrate bilayer and proteins b. protein bilayer and phospholipids c. phospholipid bilayer and proteins
Which of the following is not a component of the endomembrane system? a. mitochondrion b. Golgi apparatus c. endoplasmic reticulum d. Iysosome
Which plasma membrane component can be either found on its surface or embedded in the membrane structure? a. protein b. cholesterol c. carbohydrate d. phospholipid
Assign a function(s) to the following cellular structures: a. plasma membrane b. mitochondrion c. nucleus d. ribosome
Why is it advantageous for the cell membrane to be fluid in nature?
What controls the passage of molecules into and out of the nucleus? a. endoplasmic reticulum, an extension of the nucleus b. nuclear pores, which consists of membrane proteins c. nucleoli, in which ribosome subunits are made d. dynamically assembled microtubules e. tight junctions
The tails of the phospholipids of the plasma membrane are composed of _____ and are _____? a. phosphate groups; hydrophobic b. fatty acid groups; hydrophilic c. phosphate groups; hydrophilic d. fatty acid groups; hydrophobic
Enzymes contained in __________ break down worn-out organelles, bacteria, and other particles. a. lysosomes b. mitochondria c. endoplasmic reticulum d. peroxisomes
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 traveling from ER to Golgi, and Golgi bodies in CF cells and normal cells. In which organelle is the amount of CFTR protein most similar in both types of cells?
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?
The main function of the endomembrane system is ___________. a. building and modifying proteins and lipids b. isolating DNA from toxic substances c. secreting extracellular matrix onto the cell surface d. producing ATP by aerobic respiration