Which is not a function of plasma membrane proteins? a. Recieving signals from outside the cell or from the environment b. Binding to other cells c. Acting as enzymes in glycolytic reactions d. Transporting materials into the cell e. Providing a channel for transmembrane passage of lipophobic charged ions such as Na+ or Cl-

Which is not a function of plasma membrane proteins? a. Recieving signals from outside the cell or from the environment b. Binding to other cells c. Acting as enzymes in glycolytic reactions d. Transporting materials into the cell e. Providing a channel for transmembrane passage of lipophobic charged ions such as Na+ or Cl-

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter3: Cell Structure And Function

Section: Chapter Questions

Problem 11RQ: The tails of the phospholipids of the plasma membrane are composed of _____ and are _____? a....

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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
The image illustrates passive and active transport across the cell membrane. (Use the diagram to answer questions A-C) A. 1. Which section shows active transport?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not? B. 1. Which section shows diffusion?2. What type of solute molecules may be moved by this type of transport? C. Which of these sections are considered passive transport? Explain.
Na+ moves from high to low concentration, across the plasma membrane, through a protein channel that is permenantly open. Which statement is true about this process? a. It does not require ATP b. It is a form of active transport c. Movement is against the concentration gradient of Na+ d. The channel probably allows many different molecules and ions to cross
The image illustrates passive and active transport across the cell membrane. (Use the diagram to answer questions A-D) A. 1. Which section represents facilitated diffusion?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not?5. What type of solute molecules may be moved by this type of transport? B. 1. Which section shows active transport?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not? C. 1. Which section shows diffusion?2. What type of solute molecules may be moved by this type of transport? D. Which of these sections are considered passive transport? Explain.
Which statement is not true of endoplasmic reticulum? A. There is smooth and rough endoplasmic reticulum. B. It is found in all living cells. C. Rough ER has ribosomes bound to it. D. Proteins are transported and modified within it. E. Proteins can be targeted for ER transportation.
How do small fat-soluble molecules normally get into a cell? a. they never get in b. the pass through specialized proteins in the cell membrane called aquaporins c. they bind to protein carriers d. they pass through membrane protein channels e. They dissolve in the hydrophobic components of the membrane and enter the cell by diffusion
Which is NOT a general function of the cellular cytoskeleton? A Structural support for the cell B Assembly of DNA into chromatin C Regulation of intracellular transport D Separation of the chromosomes during mitosis E Regulation of cell motility and cellular contraction
Cells that line the intestines move nutrients from the intestines through the cell and then to the blood stream. These cells have many folds along their plasma membrane called microvilli. What is the function of these folds? O A. increase the volume of the cell O B. increase the surface area of the cell O C. increase protein transport out of the cell D. increase the ATP production within the cell red MacBook Air 吕口 F3 D00 F4 F7 F2 % & 2 3 5 6 %244
Why can't ions like sodium (Na+) or potassium (K+) diffuse directly through the phospholipid bilayer? A. Ions can only use active transport to move through the membrane B. Ions are hydrophobic and are repelled by the polar membrane C. Ions are polar and are repelled by the nonpolar part of the membrane D. Ions need to become stable before entering the cell
Component of the plasma membrane that is responsible for cell signaling? a Proteins b Carbohydrates c Phospholipid d Cellulose
Which properties are characteristic of ion channels?a. They are usually lipids.b. They exist on one side of the plasma membrane, usually the intracellular side.c. They can open and close depending on the presence of any of three types of “gates.”d. They permit movement of ions against electrochemical gradients.e. They mediate facilitated diffusion.
Which statement does NOT describe the actions of the Golgi apparatus? 1. The sacs comprising the Golgi are not interconnected. 2. The Golgi apparatus receives and modifies substances manufactured by the Endoplasmic reticulum. 3. The vesicles that bud off from the rough endoplasmic reticulum and enter the Golgi apparatus contain proteins, fats, or carbohydrates) 4. Products packaged from the Golgi apparatus are released into new transport vesicles that may be exported from the cell.