WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
3rd Edition
ISBN: 9781319103316
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 3, Problem 9MC
Summary Introduction
Introduction:
There are two types of transport - passive and active. Passive transport requires no energy and occurs across a concentration gradient. Active transport requires the use of energy and specific transport proteins.
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If a scientist drops an animal cell into a solution that contains 10 times more salt than is found inside the cell, which of the following will happen? Hint: drawing a picture may help you.
A) The cell will burst since the solution is hypertonic
B) The cell will shrink since the solution is hypotonic.
C) The cell will burst since the solution is hypotonic.
D) The cell will shrink since the solution is hypertonic.
E) The cell will not change in size since the solution is isotonic.
When a Prokaryote or Eukaryotic cell is placed in an aqueous (water) solution containing K+ and Na+ ions, one would expect that
a) the membrane protein pump would transport water
b) the cell would swim away
c) H2O would dissolve the membrane
d) lipids would diffuse in and out of the cell through special membrane proteins
e) K+ would be moved into the cell and Na+ would be moved outside of the cell membrane by special active transport proteins.
Which of the following statements is correct about passive diffusion? Select one: A) It is a process in which molecules move from a region of lower concentration to one of higher concentration (or up a concentration gradient).
B) It is a process in which molecules move from a region of higher concentration to a region of lower concentration (or down a concentration gradient).
C) It requires an expenditure of energy by the cell.
D) It may require a transport protein.
E) It involves movement of molecules down a concentration gradient and may require a transport protein.
Chapter 3 Solutions
WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
Ch. 3 - Prob. 1SACh. 3 - Prob. 2SACh. 3 - Prob. 3SACh. 3 - Prob. 4SACh. 3 - Prob. 5SACh. 3 - Prob. 6SACh. 3 - Prob. 7SACh. 3 - Prob. 8SACh. 3 - Prob. 9SACh. 3 - Prob. 10SA
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- Typically, our cells have a high concentration of sodium ions outside and a low concentration of sodium ions inside. Sodium ions continue to move out of the cell by the process of: a) secondary active transport b) pinocytosis c) facilitated diffusion d)simple diffusion e) primary active transport f) osmosisarrow_forwardThe following table depicts the rate of transport of a molecule into a cell as the external concentrations are changed. Based on what you know about the characteristics of membrane transport, the molecule is most likely transported by: a) passive transport b) simple diffusion across the membrane c) facilitated diffusion d) active transportarrow_forwardIf magnesium ions are in higher concentration outside the cell, they would move into the cell by the process of: a) facilitated diffusion through a carrier protein b) osmosis c) secondary active transport d) facilitated diffusion through a channel protein e) exocytosis f) simple diffusion g) primary active transportarrow_forward
- Which of the following modes of transport across biological membranes is driven by a chemical gradient? A) Facilitated diffusion B) Simple diffusion C) Active transport D) a and b only E) a, b, and carrow_forwardWhich of the following statements is correct about diffusion? a) It is an active process in which molecules move from a region of lower concentration to one of higher concentration. It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration. c) it requires integral proteins d) It is a rapid processarrow_forwardMagnesium ions are in higher concentration inside the cell. What process would the magnesium ions use to enter the cell? Hint: drawing a picture may help you. A) receptor-mediated endocytosis B) active transport C) simple diffusion D) osmosis E) Facilitated diffusionarrow_forward
- A cell contains 97% water and it is placed in a 5% salt solution. a) Which contains a higher concentration of water? i) cytoplasm of the cell ii) salt solution b) Which contains a higher concentration of solutes? i) cytoplasm of the cell ii) salt solution c) Cell membranes are selectively permeable, so which of the substances will move across it? i) water ii) salt iii) both water and salt iv) none d) What will happen to the volume of the cell? i) increase ii) decrease iii) stay the same i need help on this hw question. i tried it on my own but im not too sure if it's correct. the following are what i think the answers are: a) cytoplasm of the cell b) salt solution c) water d) decrease it would be helpful if you can confirm my answers and explain what i did wrong, thank you!arrow_forwardMany eukaryote cells are NOT able to synthesize (make their own) the amino acids that they require to conduct life processes. When such a cell is placed in an aqueous (water) solution containing the 20 essential amino acids, one would expect that a) nothing would happen. b) amino acids would be moved into the cell by specific membrane transport proteins. c) H2O would dissolve in the membrane. d) the cell would make Glucose into amino acids. e) the cell would divide.arrow_forwardBoth active and passive transports can be subdivided further. Distinguish between the different pairs of terms below: a) simple diffusion vs. facilitated difussion b) Facilitated diffusion vs. active transport c) channel protein vs. carrier protein d) simple diffusion vs. osmosis e) Uniporter vs. symporter vs. antiporterarrow_forward
- In order for the Golgi apparatus to release synthesized molecules to the outside of the cell (exocytosis), one would expect that the Golgi vesicle a) regulates the DNA. b) causes the translation of DNA into RNA, c) has specific membrane proteins that causes these vesicles to bind to specific binding molecules in the cell membranes. d) forms the chloroplasts membrane. e) binds the DNA to RNAarrow_forwardWhen a prokaryote cell is placed in a hypertonic solution (water with a higher energy level compared to inside the cell), one would expect that H2O would: A) diffuse out of the cell through the lipid section of the phospholipid bilayer B) cause protein synthesis C) move using active transport proteins D) diffuse through Endoplasmic reticulum portal protein E) diffuse through portal proteins of the cell membranearrow_forwardAmong the statements a, b and c, which is/are false? a) Endocytosis is the formation of vacuoles by the plasma membrane for the purpose oftransport inside the cell a small content of extracellular fluid. b) Exocytosis is the formation of vacuoles by the plasma membrane for the purpose oftransport a small amount of intracellular fluid out of the cell. c) Pinocytosis is a form of endocytosis. d) All of these statements are false. e) None of these statements is false.arrow_forward
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