Biology ยท General Awareness

Disease Vectors and Pathogens

844 Questions

Disease vectors and pathogens examine how organisms like Plasmodium and Leishmania transmit infections. Test items require matching vectors to specific diseases. Studying these life cycles is essential for scoring well.

Plasmodium infective stagesDisease transmission modesDisease vectors and fleasIntracellular parasitesElephantiasis causes

Disease Vectors and Pathogens Questions

Multiple choice biology micro organisms non cellular organism : virus world of virus bacteria - introduction, shape and structure

Viruses that infects plants generally have

  1. ds DNA

  2. ssRNA

  3. ds RNA

  4. ssDNA
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Approximately around 70% of viruses infecting plant are ssRNA, 20% are ssDNA and rest are either dsRNA or dsDNA.
  • ssDNA is advantageous due to it's ability to infect and duplicate it's genome faster.

So, the correct option is 'ssRNA'.

Multiple choice botany option b: biotechnology and bioinformatics biotechnology in agriculture gm crops transgenic organisms

Diseases like malaria and filariasis are transmitted through insect vectors .Vectors can be controlled by introducing fish

  1. Labeo

  2. Gambusia

  3. Hilsa

  4. Catla
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gambusia is a larvivorous fish used as a biological control agent to eat mosquito larvae, thereby reducing the transmission of diseases like malaria.

Multiple choice

Semmelweiss was famous for the following discovery:

  1. many microbes are made of a single cell

  2. handwashing reduces the spread of disease

  3. cells arise from cells

  4. cleanliness is important when taking care of patients
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ignaz Semmelweis discovered that handwashing by medical staff significantly reduced the incidence of puerperal fever in maternity wards. His findings were a landmark in the history of hygiene.

Multiple choice

Filaria is caused by

  1. Bacteria

  2. Mosquito

  3. Protozoa

  4. Virus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Filariasis is a parasitic disease caused by microscopic, thread-like worms. These parasites are transmitted to humans through the bite of infected mosquitoes.

Multiple choice

What sickness plagued the workers of the Panama Canal?

  1. The black plague

  2. red sickness

  3. ebola

  4. yellow fever
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yellow fever and malaria, both transmitted by mosquitoes, were major diseases that plagued workers during the construction of the Panama Canal. Efforts led by William C. Gorgas to control mosquito populations were crucial to the canal's completion.

Multiple choice

_________ is a bacteria found in poultry.

  1. Botulinum

  2. E. Coli

  3. Fecal Coliform

  4. Salmonella
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Salmonella is a genus of rod-shaped bacteria that is commonly associated with raw poultry and eggs, causing salmonellosis if food is undercooked.

Multiple choice

Fleas are an example of

  1. Parasites

  2. Ostracites

  3. Lymphocytes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fleas are parasites because they live on the bodies of host animals and feed on their blood, causing them harm without immediately killing them. Lymphocytes are white blood cells involved in immunity, and ostracites is not a biological term for fleas.

Multiple choice

Malaria is caused by

  1. Paramecium

  2. Entamoeba

  3. Trypanosoma

  4. Plasmodium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Malaria is a disease caused by the protozoan parasite Plasmodium. It is transmitted to humans through the bite of infected female Anopheles mosquitoes.

Multiple choice

Sleeping Sickness is caused by

  1. Plasmodium

  2. Leishmania

  3. Trypanosoma

  4. None
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sleeping sickness is a parasitic disease caused by the protozoan Trypanosoma, which is transmitted by the tsetse fly.

Multiple choice

Which Protozoan cause Sleeping Sickness

  1. Helicobacter pylori

  2. Trypanosoma

  3. Mousquito

  4. Staphylococci
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sleeping sickness (African trypanosomiasis) is caused by the protozoan parasite Trypanosoma brucei, which is transmitted by the tsetse fly.

Multiple choice

Any disease easily transmitted by contact.

  1. Contagion

  2. Pathogen

  3. Carrier

  4. Carcinogen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A contagion is a disease that spreads through direct or indirect contact between people. A pathogen is the agent (like a virus) that causes the disease.