BIOLOGY:CONCEPTS+INVEST.-CONNECT ACCESS
5th Edition
ISBN: 9781260542233
Author: Hoefnagels
Publisher: MCG
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Chapter 4, Problem 5MCQ
Summary Introduction
Introduction:
Active transport is involved in the movement of molecules from lower concentration to higher concentration. They require energy to meet the movements. There are two types of active transport that is primary active transport and secondary active transport.
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How does ATP relate to membrane transport?a. The movement of a substance down its concentration gradientthrough transport proteins requires the hydrolysis of ATP.b. The higher the concentration of ATP in the cell, the more permeablethe membrane is to water and small, nonpolar molecules.d. A cell uses the energy in ATP to transport substances against theirconcentration gradient.c. Digestion produces a high concentration of ATP outside the cell,and the ATP enters the cell via facilitated diffusion.
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
Glucose is transported across the cell membrane of intestinal cells. The cells lining the small intestine, however, rapidly move large quantities of glucose from the glucose-rich food into their glucose-poor cytoplasm. Using this information, which transport mechanism is most probably functioning in the intestinal cells?
A facilitated diffusion
B simple diffusion
C osmosis
D concentration gradient
Chapter 4 Solutions
BIOLOGY:CONCEPTS+INVEST.-CONNECT ACCESS
Ch. 4.1 - What are some examples of the work of a cell?Ch. 4.1 - Prob. 2MCCh. 4.1 - Prob. 3MCCh. 4.1 - Prob. 4MCCh. 4.2 - What is metabolism on a cellular level?Ch. 4.2 - Prob. 2MCCh. 4.2 - Prob. 3MCCh. 4.3 - What are the main parts of an ATP molecule?Ch. 4.3 - Prob. 2MCCh. 4.3 - Describe the relationships among endergonic...
Ch. 4.4 - Prob. 1MCCh. 4.4 - Prob. 2MCCh. 4.4 - Prob. 3MCCh. 4.4 - Prob. 4MCCh. 4.4 - List three conditions that influence enzyme...Ch. 4.5 - What is diffusion?Ch. 4.5 - What types of substances diffuse freely across a...Ch. 4.5 - Prob. 3MCCh. 4.5 - Prob. 4MCCh. 4.5 - Prob. 5MCCh. 4.5 - Prob. 6MCCh. 4.6 - How does a knifefish adjust its electric field?Ch. 4.6 - Prob. 2MCCh. 4 - Prob. 1MCQCh. 4 - Building proteins _____ energy; ATP hydrolysis...Ch. 4 - How does an enzyme affect the energy of a...Ch. 4 - Prob. 4MCQCh. 4 - Prob. 5MCQCh. 4 - Some people claim that lifes high degree of...Ch. 4 - List some examples of endergonic and exergonic...Ch. 4 - Why do electron transport chains release energy?Ch. 4 - Provide an example of an appliance that uses...Ch. 4 - Name at least four ways that a cell uses ATP.Ch. 4 - Use what you know about enzymes to propose an...Ch. 4 - Prob. 7WIOCh. 4 - Prob. 8WIOCh. 4 - Prob. 9WIOCh. 4 - Liver cells are packed with glucose. If the...Ch. 4 - Prob. 1PITCh. 4 - Prob. 2PITCh. 4 - Prob. 3PIT
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- Where will the energy for active transport be derived from? A. Hydrolysis of ATP B. Co-transport of metabolites via carrier molecules, channels or gates C. Amino acid rearrangement due to conformational changes in the protein carriers, channels or gates. D. Both A and B E. All of thesearrow_forwardWhich is the complete description of active transport? The movement of molecules from an area of higher concentration to an area of lower A concentration across a selectively permeable membrane which uses metabolic energy from ATP. The movement of molecules from an area of higher concentration to an area of lower B concentration across a selectively permeable membrane which does not use metabolic energy from ATP. The movement of molecules from an area of lower concentration to an area of higher C concentration across a selectively permeable membrane which uses metabolic energy from ATP and transport proteins. The movement of molecules from an area of lower concentration to an area of higher D concentration across a selectively permeable membrane which does not use metabolic energy from ATP and transport proteins.arrow_forwardWhy should it not be surprising that for many cells water requires a protein for its transport across a membrane? A. There is never a concentration gradient for water across the membrane to drive its transport. B. The transport protein is needed to prevent the hydrolysis of the phospholipid chains as water crosses the membrane. C. Water is very polar which inhibits its free diffusion across the membrane. D. All molecules require transport proteins to cross a membrane. In the mitochondria phosphate ion (PO43-) and H+ are transported together from the intermembrane space into the matrix. Which statement applies? A. The interior of the transport protein must be uncharged. B. The transport protein must have a relatively large central channel to accommodate both ions. C. The transport protein is a symport. D. All of the abovearrow_forward
- Which statement is NOT true of membrane transport • proteins? A. Their specificity depends on their three-dimensional structure. B. They are responsible in some cases for facilitated diffusion. C. They are responsible in some cases for active transport. D. They produce a chemical change in the molecules they are transporting.arrow_forwardAmong the membrane transporters, the channels require energy and therefore are involved in active transport. * D. Disagree, because channels are not proteins and therefore are not involved in active tranport. A. Agree, because channels are associated with H+-ATPase. B. Disagree, because the pumps are the ones involved in active transport. C. Agree, because channels are proteins involved in active transport.arrow_forwardImagine a hypothetical cell with a higher concentration of glucose inside the cell thanoutside. Answer the following questions about this cell, assuming all transport acrossthe membrane is passive, not active.a. Can the glucose simply diffuse across the cell membrane? Why or why not?b. If there are glucose transport proteins in the cell membrane, which way wouldglucose flow- into or out of the cell? Explain your answer.c. If the concentration of glucose was equal inside and outside of the cell, do you thinkthere would be a net flow of glucose across the cell membrane in one direction orthe other? Explain your answer.arrow_forward
- 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.arrow_forwardWhich of these statements about the facilitated diffusion of glucose is true? a. There is a net movement from the region of lower to the region of higher concentration. b.Carrier proteins in the plasma membrane are required for this transport. c. This transport requires energy obtained from ATP. d.It is an example of cotransport.arrow_forward-In the figure to the left, what type of transport is being used to move sodium out of the cell? a. Simple diffusion b. Passive transport c. Primary active transport d. Secondary active transport Na Na Na Na Na Na Na Na Na Na 3 Na Na Na Na Glucose Na Na Na Na Na glucose symporter Na Na-K" ATPase Na Glucose Glucose Na ATP + H,0 2K ADP + P Glucosearrow_forward
- 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 diffusionarrow_forwardPassive membrane transport processes include... a.movement of water from an area of high solute concentration to an area of low concentration b.consumption of ATP c.the use of transport proteins when moving substances from areas of low to high concentration d.movement of a substance down its concentration gradientarrow_forwardThe process of “active transport" through a membrane may be described by which of the following? A. the movement of ions and small molecules away from regions where they are in high concentration. B. the use of energy from ATP to move ions and small molecules into regions where they are in lower concentration. C. the plasma membrane engulfs the substance and moves it through the membrane. D. the use of energy from ATP to move ions and small molecules against their concentration gradient.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