Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 7, Problem 1TYU
In what way do the membranes of a eukaryotic
Cell vary?
- (A) Phospholipids are found only in certain membranes.
- (B) Certain proteins are unique to each membrane.
- (C) Only certain membranes of the cell are selectively permeable.
| PRACTICE TEST Goo.gl/CUYGKD |
- (D) Only certain membranes are constructed from amphipathic molecules.
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Students have asked these similar questions
In what way do the membranes of a eukaryoticcell vary?(A) Phospholipids are found only in certainmembranes.(B) Certain proteins are unique to each membrane.(C) Only certain membranes of the cell areselectively permeable.(D) Only certain membranes are constructed from amphipathicmolecules.
According to the fluid mosaic model of membrane structure,proteins of the membrane are mostly(A) spread in a continuous layer over the inner and outersurfaces of the membrane.(B) confined to the hydrophobic interior of the membrane.(C) embedded in a lipid bilayer.(D) randomly oriented in the membrane, with no fixed insideoutside polarity.
27.
Ions cannot cross directly through a lipid bilayer, yet we know they travel in and out of cells. Which of the following is/are true about how ions diffuse cross membranes?
a)
They diffuse down their concentration gradients.
b)
They diffuse through channels formed by integral membrane proteins.
c)
They diffuse down their electrical gradients.
d)
a and c
e)
a, b and c
Chapter 7 Solutions
Campbell Biology
Ch. 7.1 - VISUAL SKILLS Carbohydrates are attached to...Ch. 7.1 - Prob. 2CCCh. 7.2 - What property allows O2 and CO2 to cross a lipid...Ch. 7.2 - VISUAL SKILLS Examine Figure 7.2. Why is a...Ch. 7.2 - MAKE CONNECTIONS Aquaporins exclude passage of...Ch. 7.3 - Prob. 1CCCh. 7.3 - WHAT IF? If a Paramecium swims from a hypotonic...Ch. 7.4 - Prob. 1CCCh. 7.4 - Prob. 2CCCh. 7.4 - MAKE CONNECTIONS Review the characteristics of...
Ch. 7.5 - As a cell grows, its plasma membrane expands. Does...Ch. 7.5 - DRAW IT Return to Figure 7.9, and circle a patch...Ch. 7.5 - Prob. 3CCCh. 7 - In what ways are membranes crucial to life?Ch. 7 - How do aquaporins affect the permeability of a...Ch. 7 - What happens to a cell placed in a hypertonic...Ch. 7 - ATP is not directly involved in the functioning of...Ch. 7 - Which type of endocytosis involves the binding of...Ch. 7 - In what way do the membranes of a eukaryotic Cell...Ch. 7 - According to the fluid mosaic model of membrane...Ch. 7 - Which of the following factors would tend to...Ch. 7 - Which of the following processes includes all the...Ch. 7 - Prob. 5TYUCh. 7 - DRAW IT An artificial "cell" consisting of an...Ch. 7 - EVOLUTION CONNECTION Paramecium and other...Ch. 7 - Prob. 8TYUCh. 7 - SCIENCE, TECHNOLOGY, AND SOCIETY Extensive...Ch. 7 - WRITE ABOUT A THEME: INTERACTIONS A human...Ch. 7 - SYNTHESIZE YOUR KNOWLEDGE In the supermarket,...
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- 3)What is the second type of lipid that plays a major role in the plasma membrane? This lipid does not have polar and nonpolar regions (its not amphiphilic) but plays a critical role in membrane permeability. A)phospholipids b) steroid hormones c) Cholesterol 4)Which one of the following influences the rate at which diffusion can occur? Size of the concentration gradient Mass of the molecule Distance All of the above affect diffusion None of the above affect the diffusion ratearrow_forwardWhich of the following describes the plasma membrane? 1) phospholipid bilayer surrounding the cell 2) a membrane composed of tiny shelves or cristae 3) single-layered membrane that surrounds the nucleus of the cell 4) double layer of protein enclosing the plasmaarrow_forwardWhich of the following statements is true of membrane proteins? a) They are suspended on the surface of the membrane. b) They are partly embedded in the bilayer c) They span across the bilayer and project from both sides d) Any of these are true, depending on the specific membrane protein.arrow_forward
- 1. Movement of molecules through the cell membrane: A). Define the difference between passive transport and active transport, B). Include examples of each. C). For each example specify the type of cell, the name of the membrane protein(s), and the substance that is being transported. 2. Energy and cellular functions: The evolution of the Prokaryotic cell type into the Eukaryotic cell type is about an increase in cell size and complexity. The Chloroplast and the mitochondrion represent important contributors to this process. A). Compare the structure of the Chloroplasts and the Mitochondrion in the evolution of Prokaryotes and Eukaryotes B). How does each contribute to the evolution of and success of the Eukaryote cell type.arrow_forward17 What locks all transmembrane proteins in the bilayer? a) Chemical bonds that form between the phospholipids and the protein. b) Hydrophobic interactions between nonpolar amino acids of the proteins and the aqueous environments of the cell c) Attachment to the cytoskeleton d) The addition of sugar molecules to the protein surface facing the external environment True/False 1 Lipids yield more energy per gram than carohydrates 2 Fatty acid molecules are amphipathic by nature give both answer asap thanksarrow_forward. Cyanide binds to at least one molecule involved in producingATP. If a cell is exposed to cyanide, most of the cyanide will befound within the(A) mitochondria.(B) ribosomes.PRACTICE TEST goo.gl/CUYGKD(C) peroxisomes.(D) lysosomes.arrow_forward
- b) Cellular membranes are generally found in environments that contain lots of water. Draw a diagram of what the phospholipid bilayer of a plasma membrane would look like if it were placed in a hydrophobic environment. (**Note that you only have to draw the phospholipid bilayer, you don't have to draw the other major components again as you did in part a) poned In salt wer (ho byorout obods f.Cplan why sctive tnsport is requind in tive tre nolaib beisio c) What part or parts of a cellular membrane play(s) a role in determining the fluidity of the membrane? pslomlo belowarrow_forward10(a) Draw or explain the structure of the plasma membrane, 10(b) explain how the plasma membrane is able to be selectively permeable 10(c) How do small, lipid-based molecules move through the membrane? 10(d) How do large or polar molecules move through the membrane?arrow_forward1) Why can cell membranes be polar? What does polar mean? 2) What are the basic cytoskeletal components of a cell? What does an animal cell have that no other cell has in the cytoskeleton?arrow_forward
- Proteins which are only on one side of the plasma membrane and may not interact with the phospholipids directly. The proteins are often involved in intracellular signialing. a) cholesterol b) peripheral protein c) integral proteins D) glycolipidarrow_forward1. Lysosome is regarded as a body that is covered by membrane, a little smaller than mitochondrion and functions as storage for several hydrolytic enzymes. The enzymes in lysosome can digest substances that are engulfed by the cell and under certain conditions can destroy the cell itself. (a) Name ONE type of cell in the human body that contains many lysosomes. Explain why the cell contains many lysosomes. (b) State ONE different between the lysosome membrane and the mitochondrion membrane. (c) State ONE special feature of the lysosome membrane. (d) Explain how lysosome acts to release its enzymes in the cell.arrow_forwardOnly typed explaination otherwise leave it Carrier proteins that bind to substances to move them through the membrane and proteins that form pores or channels to allow passage of substances through the membrane are collectively called __________. A) integral proteins B) transport proteins C) transmembrane proteins D) glycoproteinsarrow_forward
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