Question 1

Which viruses have single-stranded RNA that acts as a template for DNA synthesis?

Accepted Answer

A)  lytic phages 
B)  proviruses 
C)  viroids 
D)  bacteriophages 
E)  retroviruses 
A)  lytic phages 
B)  proviruses 
C)  viroids 
D)  bacteriophages 
E)  retroviruses

Question 2

You believe that you have isolated a new strain of positive-sense, single-stranded RNA virus and set about studying it in your laboratory. Which of the following lines of evidence would most strongly support your hypothesis that the virus is a [+]ssRNA?

Accepted Answer

A)  The virions are diploid. 
B)  You sequence the bases in the viral RNA and the mRNA and find them to be antiparallel. 
C)  Introducing a protease inhibitor causes the virus to stop producing proteins and reproducing. 
D)  Introducing a reverse transcriptase inhibitor slows down the growth of the virus. 
A)  The virions are diploid. 
B)  You sequence the bases in the viral RNA and the mRNA and find them to be antiparallel. 
C)  Introducing a protease inhibitor causes the virus to stop producing proteins and reproducing. 
D)  Introducing a reverse transcriptase inhibitor slows down the growth of the virus.

Question 3

You isolate a cell infected with an adenovirus. What are you most likely going to see when you examine the cell?

Accepted Answer

A)  It is a bacterium. 
B)  It is undergoing mitosis. 
C)  Reverse transcriptase is present in the nucleus. 
D)  It does not have a nucleus. 
A)  It is a bacterium. 
B)  It is undergoing mitosis. 
C)  Reverse transcriptase is present in the nucleus. 
D)  It does not have a nucleus.

Question 4

RNA viruses require their own supply of certain enzymes because ________.

Accepted Answer

A)  host cells rapidly destroy the viruses 
B)  host cells lack enzymes that can replicate the viral genome 
C)  these enzymes translate viral mRNA into proteins 
D)  these enzymes penetrate host-cell membranes 
E)  these enzymes cannot be made in host cells 
A)  host cells rapidly destroy the viruses 
B)  host cells lack enzymes that can replicate the viral genome 
C)  these enzymes translate viral mRNA into proteins 
D)  these enzymes penetrate host-cell membranes 
E)  these enzymes cannot be made in host cells

Exam 33: Viruses

Which viruses have single-stranded RNA that acts as a template for DNA synthesis?

You believe that you have isolated a new strain of positive-sense, single-stranded RNA virus and set about studying it in your laboratory. Which of the following lines of evidence would most strongly support your hypothesis that the virus is a [+]ssRNA?

You isolate a cell infected with an adenovirus. What are you most likely going to see when you examine the cell?

RNA viruses require their own supply of certain enzymes because ________.

Biology and the Tree of Life

Water and Carbon: the Chemical Basis of Life

Protein Structure and Function

Nucleic Acids and the Rna World

An Introduction to Carbohydrates

Ecosystems and Global Ecology

Lipids, Membranes, and the First Cells

Inside the Cell

Energy and Enzymes: an Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cellcell Interactions

The Cell Cycle

Meiosis

Mendel and the Gene

Dna and the Gene: Synthesis and Repair

How Genes Work

Transcription, Rna Processing, and Translation

Control of Gene Expression in Bacteria

Control of Gene Expression in Eukaryotes

The Molecular Revolution: Biotechnology and Beyond

Genes, Development, and Evolution

Evolution by Natural Selection

Evolutionary Processes

Speciation

Phylogenies and the History of Life

Bacteria and Archaea

Protists

Green Algae and Land Plants

Fungi

An Introduction to Animals

Protostome Animals

Deuterostome Animals

Plant Form and Function

Water and Sugar Transport in Plants

Plant Nutrition

Plant Sensory Systems, Signals, and Responses

Plant Reproduction and Development

Animal Form and Function

Water and Electrolyte Balance in Animals

Animal Nutrition

Gas Exchange and Circulation

Animal Nervous Systems

Animal Sensory Systems

Animal Movement

Chemical Signals in Animals

Animal Reproduction and Development

The Immune System in Animals

An Introduction to Ecology

Behavioral Ecology

Population Ecology

Community Ecology

Biodiversity and Conservation Biology

Filters