Worksheet: Diseases Caused by Pathogens

In this worksheet, we will practice defining a pathogen, and describing some common infections caused by pathogens.

Q1:

Which of the following best defines a pathogen?

  • AA pathogen is a cell produced by the body to fight off infections.
  • BA pathogen is a small organism.
  • CA pathogen is a disease-causing microorganism.
  • DA pathogen is a chemical that can be passed from person to person.
  • EA pathogen is a protein that stimulates an immune response.

Q2:

Diseases caused by pathogens are often communicable. What is a communicable disease?

  • AA disease that cannot be transmitted between organisms
  • BA disease that can be passed from organism to organism

Q3:

Which of the following diseases is not caused by a virus?

  • AMeasles
  • BTobacco mosaic disease
  • CChickenpox
  • DAthlete’s foot
  • EEbola

Q4:

A farmer is trying to establish what diseases are attacking his plants and trees.

What symptoms would he expect to see if the disease was rose black spot?

  • ARose-colored patches on the surface of the leaves
  • BVisible breaks and black lesions on the stems
  • CBlack patches on the surface of the leaves

What symptoms would he expect to see if the disease was tobacco mosaic virus?

  • AVisible breaks and lesions on the stems
  • BNo visible symptoms
  • CDiscoloration of the leaves
  • DRed spots on the leaves

What symptoms would he expect to see if the disease was Chalara ash dieback?

  • ABright orange spots on the leaves
  • BDiscoloration of the leaves
  • CLesions on the trunk of an ash tree
  • DNo visible symptoms

Q5:

Which of the following diseases is caused by bacteria?

  • AHIV
  • BAthletes foot
  • CMalaria
  • DSalmonella food poisoning
  • EInfluenza

Q6:

A parasite called Plasmodium causes the infectious disease known as malaria. What type of pathogen is Plasmodium?

  • AFungus
  • BWorm
  • CProtist
  • DBacterium
  • EVirus

Q7:

Helicobacter pylori usually lives harmlessly in the human stomach but can occasionally cause stomach ulcers. What type of pathogen is Helicobacter pylori?

  • AWorm
  • BVirus
  • CProtist
  • DFungus
  • EBacterium

Q8:

The picture shows a tree infected with Chalara ash dieback, which causes lesions in tree barks. What type of pathogen causes Chalara ash dieback?

Fungus - 72ppi
  • AFungus
  • BProtist
  • CBacteria
  • DVirus
  • EWorm

Q9:

The image shows rose leaves that have been infected with the disease rose black spot.

Rose black spot - 72ppi

What pathogen causes rose black spot?

  • AProtist
  • BFungus
  • CVirus
  • DBacteria
  • EWorm

Q10:

The diagram below shows the average relative sizes and basic structures of various pathogens.

What pathogen is represented by label 1?

  • AFungi
  • BBacteria
  • CVirus

What pathogen is represented by label 2?

  • AFungi
  • BBacteria
  • CVirus

What pathogen is represented by label 3?

  • ABacteria
  • BFungi
  • CVirus

Q11:

The diagram provided shows the life cycle of the Plasmodium parasite that causes malaria. This life cycle requires a vector.

In terms of infectious disease, what is a vector?

  • AAn agent that carries and transmits a disease between organisms
  • BA cell in the body that fights off disease
  • CA protein on the surface of a pathogen that induces an immune response
  • DA disease-causing microorganism

In the life cycle of the Plasmodium parasite, what acts as the vector?

  • ABlood cells
  • BHumans
  • CLiver cells
  • DMosquitoes

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.