Microbiology: An Introduction
Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Chapter 13, Problem 3MCQ
Summary Introduction

Introduction:

Viruses are small organisms which contain the DNA or RNA as their genetic materials. The genetic materials are composed of nucleic acid and proteins. They multiply in all living cells such as humans, animals, bacteria and plants. Viruses do not produces any enzyme for its metabolism; however they take over the host cell metabolic machineries for its multiplication.

RNA-dependent RNA polymerase is an important enzymes that codes in all RNA viruses. It synthesizes the replicate RNA strand from the negative template RNA strand.

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If the HIV did not have a reverse transcriptase enzyme, then which of the following would apply? Select one: a. The virus can make use of the reverse transcriptase enzyme from the host cell to convert its RNA into DNA b. Viral particles will be produced without reverse transcriptase enzyme since the original HIV is an RNA virus and needs to assemble RNA ant coat proteins together c. The virus will manufacture its proteins from its RNA using translation and ribosomes from host cell d. Provirus will not be formed and assembly of viral particles will never occur e. The virus will not be able to recognise the host cell and therefore entry into the cell is blocked
The HIV virus produces copies of its genome through:     A. DNA replication     B. Reverse transcription followed by integration then normal transcription   C. RNA replication from an RNA template     D. differential splicing
Which of the following enzymes helps the +sense RNA virus Poliovirus to make multiple copies of its genome?   A. RNA dependent RNA polymerase   B. RNA dependent DNA polymerase   C. Reverse transcriptase   D. DNA Polymerase I   E. DNA dependent RNA polymerase
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What Is A Virus ? ; Author: Peekaboo Kidz;https://www.youtube.com/watch?v=YS7vsBgWszI;License: Standard YouTube License, CC-BY