Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 20, Problem 13SQ
Summary Introduction
Introduction: Bacterial exotoxins are the harmful proteins that are secreted by the bacteria.
In contrast to the endotoxins, the exotoxins are released to the environment either actively or during cell lysis. They are heat liable proteins and are extremely toxic to the affected cells even in smaller amounts.
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Naked viruses typically exit the cell via this/these processes (may choose more than one).
a. budding
b. exocytosis
c. lysis
d. membrane fusion
A bacterium has the following characteristics:∙ It adheres to the human intestinal lining using a feature that protects it from phagocytes, bacteriophages, and dehydration∙ It can survive being boiled∙ It contains no plasmids and relatively little peptidoglycanWhich of the following statements best describe the cell wall of this bacterium?
Group of answer choices
A. Its innermost layer is composed of a phospholipid bilayer.
B. After it has been subjected to Gram staining, the cell should remain purple.
C. It has an outer membrane of lipopolysaccharide.
D. It is mostly composed of a complex, cross-linked polysaccharide.
If a cell is non-selectively engulfing samples of extracellular fluid, for example to absorb nutrients, it will likely utilize
a. exocytosis
b. phagocytosis
c. pinocytosis
d. receptor-mediated endocytosis
Chapter 20 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 20 - Bacteriophage-Inspired Antibiotics Although...Ch. 20 - Bacteriophage-Inspired Antibiotics Although...Ch. 20 - Bacteriophage-Inspired Antibiotics Although...Ch. 20 - The genome of ___ can be either RNA or DNA. a. a...Ch. 20 - The capsid of a virion consists of ___ . a. DNA b....Ch. 20 - Bacteriophages kill their host quickly by ______ ....Ch. 20 - The genetic material of HIV (a retrovirus) is...Ch. 20 - Prob. 5SQCh. 20 - Prob. 6SQCh. 20 - Prob. 7SQ
Ch. 20 - Bacteria that serve as decomposers are ___ . a....Ch. 20 - Prob. 9SQCh. 20 - Formation of a(n) ___ allows some soil bacteria to...Ch. 20 - _____ in the stomach of a cow release methane. a....Ch. 20 - A plasmid is a circle of ___ . a. RNA b. DNA c....Ch. 20 - Prob. 13SQCh. 20 - Prob. 14SQCh. 20 - Prob. 15SQCh. 20 - Prob. 1CTCh. 20 - Adenoviruses that cause colds do not have a lipid...Ch. 20 - The antibiotic penicillin acts by interfering with...Ch. 20 - Raw red alga of the genus Porphyra is part of a...
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- Bacterial cells that are _______________ in shape always have an ____________________ which helps them move through solid media like tissue. Select one: a.Spirochete / Axial Filament b.Spirillum / Endoflagella c.Spirochete / Atrichous Flagellum d.None of the Above e.Spirillum / Atrichous Flagellumarrow_forwardConsidering a normal self cell, what might you expect to find in MCH I molecules on the cell surface? a. nothing. b. bacterial fragments c. normal self epitopesarrow_forwardA cell engulfing a relatively large particle will likely utilize a.exocytosis b.receptor-mediated endocytosis c.pinocytosis d.phagocytosisarrow_forward
- The collection of bacteria, archaea, and eukaryotic microbes that normally inhabit the human body are considered, _____________. a. opportunistic pathogens b. commensals c. microtubules d. obligate intracellular organismsarrow_forwardHaemophilus influenzae is ________and requires special ____________for growth.a. motile, temperatures b. encapsulated, minerals c. intracellular, sample swabs d. fastidious, blood factorsarrow_forwardLiver cells in culture were kept at 0°C and treated with trypsin to digest the receptors on the cell surface. The temperature was then raised to 37°C and radioactive LDL was added to the culture media. Several hours later, the labeled LDL was found to be inside the cells. This specific process of LDL uptake is A. active transport B. facilitated diffusion C. phagocytosis D. pinocytosis E. receptor-mediated endocytosisarrow_forward
- The plays a major role in the synthesis of carbohydrates and lipids. a. Golgi apparatus b. rough endoplasmic reticulum Cc. smooth endoplasmic reticulumarrow_forwardWhere are proteins for export produced? A. Golgi apparatus B. Rough endoplasmic reticulum C. Cytoplasmic (free) ribosome D. Mitochondria E. Smooth endoplasmic reticulumarrow_forwardPhagocytes are white blood cells that engulf and digest pathogens as a part of the immune response of the body. Compared to other types of cells, phagocytes are likely to have a higher concentration of which of the following? A lysosomes B mitochondria с chloroplasts D ribosomesarrow_forward
- Chilling most directly affects a. nuclear proteins. b. vacuolar inclusions. c. the cytoskeleton. d. membrane lipids.arrow_forwardBiofilm formation begins when microbes attach to a surface using their. A. Cell Wall B. Glycocalyx C. Flagella D. Ciliaarrow_forwardA bacterium has the following characteristics:∙ It adheres to the human intestinal lining using a feature that protects it from phagocytes, bacteriophages, and dehydration∙ It can survive being boiled∙ It contains no plasmids and relatively little peptidoglycanWhich of the following characteristics allows this bacterium to adhere to the intestinal lining? Group of answer choices A. fimbriae B. pili C. an endospore D. a flagellumarrow_forward
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