Causes of Diseases

Q.

Why is yeast taken in the process of fermentation?

Q. Which of the following is incorrect about viruses?

1. Viruses use host machinery to produce more of their kind.
2. Viruses have either DNA or RNA as the genetic material.
3. Viruses do not infect bacteria, fungi, and algae.
4. Viruses are useful in the preparation of vaccines.

Q. What are vector-borne diseases? Explain the role of vector in disease transmission with an example.

Q. Malaria is caused by a .

1. bacteria
2. fungi
3. protozoa
4. virus

Q.

Name three diseases spread by houseflies.

Q.

Give one example of a carrier and a disease spread by it.

Q.

List various modes of spread of communicable diseases and their preventives measures.

Q.

Name the following:
Organism which causes malaria.

Q.

Name the causative agents of the following agents.

1. Malaria
2. Poliomyelitis
3. Tetanus

Q. Which of the following organisms causes the disease Typhus?

1. Rickettsia prowazekii
2. Human lice
3. Salmonella Typhi
4. Fleas

Q. Name the following:
Two viral diseases caused by mosquito bites.

Q.

Diseases, where ______ are the immediate causes, are called infectious diseases.

1. animals
2. insects
3. birds
4. microbes

Q.

Disease causing microorganisms are called__________

Q.

What exactly we understand by toxoid?

1. Virus extracts

2. Modified toxins

3. Denatured toxins

4. Isolated toxic material

Q.

Name the following:

A viral disease caused due to sexual contact with an infected person.

Q. Sunil ate pani-puri with his friends. He started getting stomach ache, diarrhoea, weakness and loss of appetite. He is likely to be suffering from which of the following disease?

Q. Mosquito acts as the vector for the transmission of malaria.

1. True
2. False

Q.

Which of the following cause plague?

1. Salmonella typhi

2. Leishmania hyphae

3. Trichinella spiralis

4. Yersinia pestis

Q.

Which insect is a vector of dengue disease?

1. Anopheles

2. Culex

3. Sandfly

4. Aedes

Q.

Give the factor on which the severity of disease manifestation depends.

Q. Which among the following statements are true?

1. Worms multiply faster than virus and bacteria.
2. Bacteria are closely related to each other than to viruses and vice-versa.
3. Life processes in bacteria are similar to those of viruses and vice-versa.
4. Drugs that block any bacterial life processes will also block viral life processes.

Q.

I am a comma-shaped, bacterial pathogen which spreads through contaminated water and food. I cause severe diarrhoea and water loss in the infected person. If not properly treated, the infected person can be dehydrated. Who am I?

1. Plasmodium vivax

2. Streptococcus pneumoniae

3. Lactobacillus

4. Vibrio cholerae

Q. Name the causitve organisms ( pathogens ) and carrier of diseases
(a) malaria
(b) dengue fever

Q. How is cholera transmitted to others?

Q.

Define the following :

Droplet infection

Q.

Name the micro-organisms that causes infectious disease and name few diseases caused by each microorganism.

Q. What are the symptoms for typhoid and goitre

Q. State whether the following statements are true or false.​

Statement 1: Elephantiasis is a disease caused by female​ Anopheles mosquito.​
Statement 2: Nausea, night sweat, and fever are the symptoms​ of malaria.​

1. Statement 1: False; Statement 2: True​
2. Statement 1: True; Statement 2: True​
3. Statement 1: True; Statement 2: False​
4. Statement 1: False; Statement 2: False​

Q.

1. Name the following.

(h) Disease caused by Clostridium tetani.

Q. State whether the given statements are true or false.

Statement 1- Anthrax is a viral disease.
Statement 2- Anthrax can be transmitted through contaminated soil, food and water.

1. 
   Statement 1: True;
   Statement 2: False
2. 
   Statement 1: False;
   Statement 2: False
3. 
   Statement 1: False;
   Statement 2: True
4. 
   Statement 1: True;
   Statement 2: True