Microbiology: An Introduction
11th Edition
ISBN: 9780321733603
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: Benjamin Cummings
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Chapter 2, Problem 10R
Summary Introduction
Introduction:
Chitin is the primary component of cell wall of
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Choose the correct answer from the following
1- The cell membrane is considered semipermeable because:
a) It allows the passage of all substances
b) It allows the passage of only water
c) It allows the passage of some substances while restricting others
d) It does not allow the passage of any substances
2- The lipid layer of the cell membrane is mainly composed of:
a) Proteins
b) Carbohydrates
c) Phospholipids
d) Cholesterol
3- Integral proteins in the cell membrane:
a) Are loosely bound and easily dissociate from the membrane
b) pass through the entire thickness of the cell membrane
c) Are responsible for the attachment of cells to their neighbors
d) Serve as receptor sites for hormones and neurotransmitters
4- The fluid mosaic model of the cell membrane suggests that:
a) The membrane is a solid structure with layers of proteins
b) The membrane is a fluid with proteins floating within it
c) The membrane is composed entirely of lipids
Which of the below statements correctly describes the extracellular matrix?
a)A layer that facilitates connections and communications with other cells in a tissue
b)A gel like substance that resists compression
c)All of the other answers are correct
d)a complex mix of proteins and polysaccharides.
Which of the following is not a function of cytoskeleton in a cell ?
A) Maintenance of cell shape and structure
B) Intracellular transport
C) Cell motility
D) Support of the organelle
Chapter 2 Solutions
Microbiology: An Introduction
Ch. 2 - What is a chemical element?Ch. 2 - DRAW IT Diagram the electronic configuration of a...Ch. 2 - What type of bond holds the following atoms...Ch. 2 - Classify the following types of chemical...Ch. 2 - Bacteria use the enzyme urease to obtain nitrogen...Ch. 2 - Classify the following as subunits of either a...Ch. 2 - DRAW IT The artificial sweetener aspartame, or...Ch. 2 - DRAW IT The following diagram shows the...Ch. 2 - Prob. 9RCh. 2 - Prob. 10R
Ch. 2 - Assume E. coli bacteria are grown in a nutrient...Ch. 2 - If Pseudomonas bacteria are supplied with...Ch. 2 - If E. coli were grown in a medium containing the...Ch. 2 - Prob. 4MCQCh. 2 - Prob. 5MCQCh. 2 - Prob. 6MCQCh. 2 - The dissociation products of the molecules are...Ch. 2 - Prob. 8MCQCh. 2 - The dissociation products of the molecules are...Ch. 2 - Prob. 10MCQCh. 2 - When you blow bubbles into a glass of water, the...Ch. 2 - Prob. 2ACh. 2 - Prob. 3ACh. 2 - Prob. 4ACh. 2 - Prob. 1CAECh. 2 - Prob. 2CAECh. 2 - Newborn babies are tested for phenylketonuria...Ch. 2 - The antibiotic amphotericin B causes leaks in...Ch. 2 - Prob. 5CAE
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- Why is it advantageous for the cell membrane to be fluid in nature?arrow_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_forwardWhen an animal cell is placed on an isotonic solution, water molecules will A) Move out of the cell, resulting in shrinkage B) move into the cell until it bursts C) move into and out of the cell at equal rates D) stop moving need help for this, thanksarrow_forward
- a) What are the forces that maintain structural integrity of biological membranes?b) Explain how each force mentioned is formed in membrane lipids. c) Comment on lipid to protein ratio in the membrane of molecules that transport insoluble substances in the blood.arrow_forwardWhich of the following statements about cell membranes is NOT true? A) Membranes are sheet like structures, only two molecules thick, that form closed boundaries between different compartments. B) Membranes consist mainly of lipids and proteins. C) Membranes are very rigid, impermeable structures Membrane lipids are small molecules that have both hydrophilic and hydrophobic moieties. D)arrow_forwardWhich of the following statements is true? a) cells do not need ribosomes if they have mitochondriab) all cells have a cell membrane but not all cells have a cell wallc) all prokaryotes are unicellular and all eukaryotes are multicellulard) cells can have either a cell membrane or a cell wall or botharrow_forward
- 1) All of the following are functions of proteins within a membrane except __________. A)Maintaining the fluidity of membranes B)transport ions and other polar substances C)receptors to bond molecules outside of the cell D)helping the body to recognize its own cells 2) Which of the following organelles is not part of the endomembrane system A)mitochondria B)golgi apparatus C)lysosomes D)rough endoplasmic reticulum 3) Which cytoskeletal element is composed of actin and is involved with muscle contraction and provided strength to cells during stretching and compression? A)Microfilimants B)Intermediate filaments C)Microtubules D)Flagellaarrow_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_forwardA 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_forward
- Which among the following defines GPI anchored proteins? 1)Integral proteins of the plasma membrane 2)Peripheral proteins of the plasma membrane 3)Proteins that bind to ion-gated channels in the plasma membrane 4)Proteins which randomly bind to lipids of the plasma membranearrow_forwardThe movement of liquid particles into a cell through the use of vesicles is known as: Facilitated diffusion Phagocytosis Pinocytosis Exocytosis Which of the following is NOT a structure involved in the movement of bacteria? Cilia Sex Pilus Flagellum Cell Wallarrow_forwardWhich of the follwoings represent the correct pathway of protein secretion? O Nucleus> RER > Transition vesicle > TGN > secretory vesicle > Exocytosis O Nucleus> RER > secretory vesicle > Golgi > transition vesicle > Exocytosis O Nucleus> RER > Transition vesicle > CGN > secretory vesicle > Exocytosis Nucleus> SER > Transition vesicle > Golgi > secretory vesilde > Exocytosis Ibron University Peport Abuse!arrow_forward
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