Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

10 Questions

1 Views

Plant Pathology

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is a virus?

A nucleoprotein that multiplies only in non-living cells

A nucleoprotein that multiplies only in living cells (correct)

A microorganism visible with a light microscope

A type of fungi causing diseases in plants

What is the size of a virus?

Large enough to be seen with a light microscope

Too small to be seen individually with a light microscope (correct)

Slightly smaller than a bacteria cell

Visible to the naked eye

How many viruses are known to date?

Around 1,000

Exactly 3,000

Less than 500

More than 2,000 (correct)

What do viruses parasitize?

Living cells of various organisms Signup and view all the answers

What are viruses composed of?

Nucleic acid and protein Signup and view all the answers

What is the nature of viruses?

Chemical molecules Signup and view all the answers

Which of the following diseases can be caused by viruses?

Influenza Signup and view all the answers

How many different species of plants can one virus infect?

Dozens Signup and view all the answers

In addition to plants, what other living organisms can viruses attack?

Humans and animals Signup and view all the answers

What is the primary function of the protein in viruses?

Forming a protective coat around the nucleic acid Signup and view all the answers

Study Notes

What is a Virus?

A virus is an infectious agent that replicates inside the cells of an organism.

Characteristics of Viruses

The size of a virus varies between 20-400 nanometers (nm) in diameter.
To date, over 2,000 species of viruses are known.

Host Range of Viruses

Viruses parasitize a wide range of organisms, including animals, plants, fungi, and bacteria.

Composition of Viruses

Viruses are composed of genetic material (either DNA or RNA) surrounded by a protein coat called a capsid.

Nature of Viruses

Viruses are not considered living organisms, as they cannot reproduce on their own and require a host cell to replicate.

Diseases Caused by Viruses

Viruses can cause a variety of diseases, including influenza, HIV, Ebola, measles, and COVID-19.

Host Range of Plant Viruses

A single virus can infect multiple species of plants, with some viruses able to infect hundreds of different plant species.

Range of Host Organisms

In addition to plants, viruses can also attack animals, bacteria, and fungi.

Function of Protein in Viruses

The primary function of the protein in viruses is to protect the viral genome and facilitate its transmission to a host cell.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Test your knowledge of plant pathology with this quiz on the fundamentals of viruses, their nature, architecture, multiplication, and transmission. Learn about the characteristics of viruses and their impact on plant health.