BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Textbook Question
Chapter 4, Problem 7SA
Most of a membrane’s diverse functions are carried out by ________ .
a. proteins | c. |
b. phospholipids | d. hormones |
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The plasma membrane of a cell is composed of a ________ ________ and regulates molecular passage via _______ ________.
a. potassium bilayer, unidirectional diffusion
b. phospholipid bilayer, selective permeability
c. phospholipid bilayer, random permeability
d. protein wall, osmotic pumps
Which of the following is Not a function of the plasma membrane proteins?
A. Acting as enzymes
B. Acting as channels
C. Acting as carriers
D. Stabilizing temperature
________ prevent fluid from leaking between adjacent cells.
a.
Gap junctions
b.
Desmosomes
c.
Tight junctions
Chapter 4 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 4 - All cells have these three things in common...Ch. 4 - Every cell is descended from another cell. This...Ch. 4 - The surface-to-volume ratio _______. a. does not...Ch. 4 - Cell membranes consists mainly of ________ and...Ch. 4 - In a lipid bilayer, the ________ of all the lipid...Ch. 4 - What controls the passage of molecules into and...Ch. 4 - Most of a membranes diverse functions are carried...Ch. 4 - The main function of the endomembrane system is...Ch. 4 - Which of the following statements is correct? a....Ch. 4 - Enzymes contained in ________ break down worn-out...
Ch. 4 - Put the following structures in order according to...Ch. 4 - Prob. 12SACh. 4 - Which of the following organelles contains no DNA?...Ch. 4 - Prob. 14SACh. 4 - Prob. 15SACh. 4 - In a classic episode of Star Trek, a gigantic...Ch. 4 - Prob. 2CTCh. 4 - What type of micrograph is shown below? Is the...
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- A plasma membrane_____ . a. controls exchanges between the cell and the external environment b. is a mesh of intermediate filaments c. is a type of extracellular matrixarrow_forwardanatomyarrow_forward________ is the process of a cell taking in needed molecules from the extracellular fluid. a. Phagocytosis b. Receptor-mediated endocytosis c. Pinocytosisarrow_forward
- Which of the following is not a function of the extracellular matrix Select one: A. Prevents the loss of water when cells are placed in a hypertonic solution. B. Assists in the movement of substances across the plasma membrane. C. Has numerous functions that affect the shape and activities of the cell that produced it. D. Takes place in reception of moleculesarrow_forwardCellular organization (e.g. movement of organelles) is facilitated by __________. Cells are capable of resisting mechanical stress due to the presence of _________. Select one: a. microtubles, intermediate filaments b. actin, microtubules c. actin, intermediate filaments d. microtubles, actin e. intermediate filaments, actin Clear my choicearrow_forwardMark the following statements about the plasma membrane as true or false. If a statement is false, correct it to make a true statement. a. _____ Integral membrane proteins generally span the width of the plasma membrane, whereas peripheral proteins are found on only one side of the membrane. b. _____ Cholesterol provides the plasma membrane with stability in the face of changing ion concentrations . c. _____ Membrane cholesterol is vitally important for cell-cell recognition. d. _____ Membrane proteins often function as channels or carriers. e. _____ The overall structure of the plasma membrane is a mosaic with the components locked tightly in placearrow_forward
- The three major parts of a cell are____________________ . a. the nucleus, the nucleolus, and the nuclear envelope b. the nucleus, cytoplasm, and the cell membrane c. a nerve cell, an epithelial cell, and a muscle cell d. endoplasmic reticulum, Golgi apparatus, and ribosomes.arrow_forwardWhich of these organelles produces large amounts of ATP?a. nucleus c. ribosomes e. lysosomesb. mitochondria d. endoplasmic reticulumarrow_forwardA cell that is ___________ has a particular morphology and function. a. determined b. differentiated c. undergoing apoptosis d. dividingarrow_forward
- Which of the following statements describes the function of plasma membranes? I. define the boundaries of the cell and its organelles and act as permeability barriers II. sites for specific biological and chemical functions III. possess transport proteins that regulate the movement of substances into and out of the cell and its organelles IV. contain protein molecules that act as receptors to detect external signals V. provide mechanisms for cell-to-cell contact, adhesion, and communication A. I and III B. I, III, IV C. I, III, IV, V D. I, II, III, IV, Varrow_forwardWhich of the following statements regarding the selective permeability of the lipid bilayer is FALSE? A. the permeability of the lipid bilayer to different substances varies. B. The lipid bilayer component of the plasma membrane is highly permeable to nonvolatile molecules such as oxygen. C. The more hydrophobic or lipid soluble a substance is, the greater the lipid bilayers permeability to that substance. D. The lipid bilayer component of the plasma membrane is moderately permeable to ions and large, uncharged polar moleculesarrow_forwardA large structure, normally visible in the nucleus of a cell, whereribosomal subunits are produced is called a(n)a. endoplasmic reticulum. c. nucleolus.b. mitochondrion. d. lysosome.arrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license