Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 4, Problem 5SQ
Summary Introduction
Introduction: All cells have a cell membrane that is also known as plasma membrane, and it is made up of proteins and lipids. It provides cell shape and structural support. It is a semi-permeable membrane that regulates the entry as well as the amount of substances entering in the cell. They play the role of gatekeeping.
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the synthesis of carbohydrates takes place at the
a. rough endoplasmic reticulum
b. ribosomes
c. smoother endoplasmic reticulum
d. a nuclear membrane
What are the primary molecules found in the membranes of cells?
A.) triglycerides
B.) carbohydrates
C.) phospholipids
D.) proteins
Which of the following are essential components of cell membrane?
a. Cholesterol
b.Phospholipids
c.Long chain polyunsaturated fatty acids
d.All of the above
Chapter 4 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 4 - Abnormal Motor Proteins Cause Kartagener Syndrome...Ch. 4 - All cells have these three things in common:...Ch. 4 - Prob. 2SQCh. 4 - Prob. 3SQCh. 4 - True or false? Some protists start out life with...Ch. 4 - Prob. 5SQCh. 4 - True or false? Ribosomes are only found in...Ch. 4 - Unlike eukaryotic cells, prokaryotic...Ch. 4 - Enzymes. contalned in _______ break down worn-out...Ch. 4 - Put the following structures in order according to...
Ch. 4 - The main function of the endomembrane system is:...Ch. 4 - True or false? The plasma membrane is the...Ch. 4 - Prob. 12SQCh. 4 - Which of the following organelles contains no DNA?...Ch. 4 - No animal cell has a ___________. a. plasma...Ch. 4 - Prob. 15SQCh. 4 - In a classic episode of Star Trek, a gigantic...Ch. 4 - Prob. 2CTCh. 4 - Prob. 3CT
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- Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids; phospholipids b. phospholipids; protein d. phospholipids; ECMarrow_forwardWhich of the following is true about lipid bilayers? A. They are self-forming. B. They are dynamic. C. They are fluid. D. They are permeable. A, C, D only A, B, C only B, C, D only A, B, C, Darrow_forwardWhich of the following is NOT a component of the cell plasma membrane? A. cholesterol B. proteins C. microfi laments D. phospholipidsarrow_forward
- The function of the cell membrane is similar to the function of what human organ system? A. Digestive B.integumentary C.muscular D. Skeletal arrow_forwardWhich of these is not a function of the lipid bilayer? A. Changes the temperature B. Provides a flexible matrix C. Imposes a barrier to permeabilityarrow_forwardBased on what you have just learned about the structure and function of cellular membranes, describe how such a cell accomplishes these interactions with its environment.arrow_forward
- Phospholipids are important components of A. bacterial cell walls B. ribosomes C. carbohydrates D. steroid lipids E. lipid dropletsarrow_forwardWhich One is NOT TRUE about membranes? a. Membranes rich in fatty acids containing one or more double bonds are more fluid than membranes with no double bonds in fatty acids. b. If cholesterol is present in membranes, the fluidity of membranes will be reduced at moderate and warm temperatures. c. If cholesterol is present in membranes, the fluidity will remain intact at low temperatures. d. If the fatty acids with double bond are present in membranes, the membrane will be viscous.arrow_forwardWhich of the following is incorrect regarding phospholipids?a. The heads are polar.b. The tails are nonpolar.c. They contain a phosphate group in place of one fatty acid.d. They are energy-storage molecules in the cell.arrow_forward
- Which structure is not a component of all cells?a. cell wall c. genetic materialb. cell membrane d. ribosomesarrow_forwardAll of the chemical reactions that occur in a cell are calleda. homeostasis. b. metabolism.c. heterostasis.d. cytoplasm.arrow_forwardDescribe the roles played by carbohydrates in cells: A.) Raw material B.) Structural support C.) Cell identity D.) Energyarrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license