EP HUMAN BIOLOGY-MODIFIED MASTERING
8th Edition
ISBN: 9780134326436
Author: Johnson
Publisher: PEARSON CO
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Chapter 9, Problem 2TY
Summary Introduction
Introduction:
Viruses are very small infection-causing pathogens. They either have a DNA (deoxyribonucleic acid) or RNA (ribonucleic acid), which is surrounded mainly by a protein coat. They are intermediates between living and nonliving organisms.
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Symptoms of viral infections are caused by:
(choose all that apply)
A. Actions of the virus that result in cell damage or death
B. Actions of the immune system that result in cell damage or death
C. Changes in a cell's genetics that result in cancer
Which of the following statements seemingly refute the fact that viruses are nonliving?
A.They reproduce themselves only inside a host cell.
B. They contain no enzymes.
C. They can change over time, with the emergence of new strains.
D. They cause diseases similar to those caused by bacteria.
E. They are composed of protein and nucleic acid.
Define the following terms: a. virus b. virion c. capsid d. retrovirus e. enveloped virus
Chapter 9 Solutions
EP HUMAN BIOLOGY-MODIFIED MASTERING
Ch. 9 - Prob. 1QCCh. 9 - Prob. 2QCCh. 9 - Define the term pathogen and give some examples.Ch. 9 - Prob. 2CRCh. 9 - Prob. 3CRCh. 9 - Prob. 4CRCh. 9 - Prob. 5CRCh. 9 - Describe in general terms the distinction between...Ch. 9 - Describe the concept of an antigen and how it...Ch. 9 - Prob. 8CR
Ch. 9 - Prob. 9CRCh. 9 - Prob. 10CRCh. 9 - Prob. 1TYCh. 9 - Prob. 2TYCh. 9 - Prob. 3TYCh. 9 - Prob. 4TYCh. 9 - Prob. 5TYCh. 9 -
6. Which of the following is a benefit of...Ch. 9 - Prob. 7TYCh. 9 -
8. The following are steps in phagocytosis: (1)...Ch. 9 - Prob. 9TYCh. 9 - Prob. 10TYCh. 9 - Prob. 11TYCh. 9 - Prob. 12TYCh. 9 - Which of the following increases the likelihood of...Ch. 9 - Which of the following does not belong with the...Ch. 9 - Which of the following statements about HIV is...Ch. 9 - Prob. 1AWKCh. 9 - Prob. 2AWKCh. 9 -
3. Everyone knows that bacteria can cause...Ch. 9 - Prob. 4AWKCh. 9 - Prob. 5AWKCh. 9 - Why is it that most people get the chicken pox...Ch. 9 - The immune system is supposed to defend us from...
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- Viruses may include of any of the following structures, EXCEPT: a. DNA b. ribosomes c. capsids d. viral envelopes e. RNAarrow_forwardWhich of the following is NOT a feature associated with viruses? a. Cytoplasm c. Protein coat b. Genetic information d. Envelopearrow_forwardTo infect their specific host cells, viruses go through these chronological steps EXCEPT a. Release of progeny viruses b. Absorption and penetration of the viral particles c. Uncoating of the nucleic acid of the viral particles d. Synthesis and assembly of viral particle componentsarrow_forward
- Viruses contain either DNA or RNA. Viruses possess their own metabolic system a. FIRST statement is TRUE; SECOND statement is FALSE b. BOTH Statements are TRUE c. FIRST statement is FALSE; SECOND statement is TRUE d. BOTH statements are FALSEarrow_forwardRegarding enveloped viruses, which of the following is true of the viral envelope? A. It has the same structure as a cell wall B. It is resistant to soaps/detergents C. It is composed of capsid proteins D. It is a phospholipid bilayer derived from a membrane of its host cell 42.arrow_forwardA virus is isolated, and individual virions appear spherical. What type of virus is this? A. Bacteriophage B. Helical C. Icosahedral D. Lysogenicarrow_forward
- Bacterial viruses and animal viruses are similar in that they both a. have only DNA as genetic material. b. have only RNA as genetic material. c. require host functions for some aspect of their life cycle. d. do not require any host proteins.arrow_forwardWhat is the basic classification of viruses. In other words, if you find a new virus, what is the first thing to determine? A. Is this a DNA or an RNA virus? B. Does it cause blue snotty nosed fever? C. does it have a vector? D. does it infect humans?arrow_forwardWhich of the following is a reason that scientists do not classify viruses as living things? A. They must infect a host because they cannot reproduce on their own. B. They contain DNA, like all living organisms. C. The experience evolution through natural selection. D. They replicate themselves and reproducearrow_forward
- Viruses are acellular because a. they are biological entities that do not have a cellular structure. b. they are known as virions that obtain their genetic materials from their host c. they are only fragments of non living material. d. None from choices a-carrow_forwardWhich of the following is common in animal viruses but NOT in bacteriophage? a. DNA b. Capsid c. Envelope d. Icosahedral shapearrow_forwardGive an example of each of the following types of viruses a. Double stranded DNA b. Single stranded DNA c. Positive sense RNA d. Negative sense RNA e. Retrovirusesarrow_forward
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What Is A Virus ? ; Author: Peekaboo Kidz;https://www.youtube.com/watch?v=YS7vsBgWszI;License: Standard YouTube License, CC-BY