Pathogens

Q.

The active form of Entamoeba histolytica feed upon__________ .

Q.

Viruses are essentially made up of -

1. Proteins and nucleic acid

2. Proteins and carbohydrates

3. Lipids and nucleic acids

4. Starch, proteins and lipid

Q.

Disease-causing biological agents are called __.

Q. Entamoeba histolytica is found in –

1. Rectum
2. Oral cavity
   
3. Stomach
4. Intestine

Q.

Do Viruses have a conscious?

Q. Where are nucleic acids found?

1. Viruses only
2. Bacteria only
3. Mammals only
4. All forms of life

Q. Mention if the following statements are true (T) or false (F)​

(v) Mosquitoes are the source of dysentery germs T/F

Q.

Microbial diseases that can spread from an infected person to a healthy person through the air, water, food or physical contact are called communicable diseases. State true or false.

1. True

2. False

Q.

All microbes are pathogens.

1. True

2. False

Q. Amoebiasis is caused by the protozoan:

1. Entamoeba
2. Plasmodium
3. Euglena
4. Amoeba proteus

Q. The image shows the okra (bhindi) plant with the yellow vein mosaic disease.

1. True
2. False

Q.

Which of the following is a viral disease?

1. Chicken pox

2. Skin diseases

3. Diarrhea

4. Malaria

Q. Mention whether the following statements are true (T) or false (F).
Malaria is caused by a protozoan

Q.

What are microorganisms?

Q. Which of the following forms a part of the immune sytem and protects the body from germs?

1. White blood cells
2. Red blood cells
3. Plasma
4. Platelets

Q. Describe lymphocytes in brief

Q.

Lymph contains these special type of white blood cells which help in fighting infections.

1. lymphocytes

2. thrombocytes

3. erythrocytes

4. none of these

Q. What are microorganisms?

Q.

List a few diseases that are caused by a virus. [3 MARKS]

Q. Anthrax is a serious disease of

1. Cattle
2. Poultry
3. Fish
4. All of the above

Q. Which one of the fish is natural enemy of mosquitoes?

1. Chimaera
2. Exocoetus
3. Gambusia
4. Fistularia

Q. Which of the following group is called pathogens?

1. Viruses, bacteria and fungi
2. Measles, mumps and chicken pox
3. All of the above
4. Cholesterol, saturate fat, and helminthes

Q.

Disease-causing microorganisms are known as:

1. Infectors

2. Pathogens

3. Friendly microbes

4. Amoeba

Q. Yersinia pestis is a virus that causes plague.

1. True
2. False

Q.

In the given options, _____________ is a pair of viral diseases.

1. Typhoid, Tuberculosis

2. Tuberculosis, AIDS

3. Dysentery, common cold

4. Common Cold, AIDS

Q.

Which type of the cells from our blood fight against germs or foreign material that enters in our body?

1. White blood cells (WBCs)

2. Red blood cells (RBCs)

3. Platelets

4. None of these

Q.

Can virus feel hot &cold

Q.

All microbes are pathogens.

1. True

2. False

Q.

Match the following images with the respective given steps P, Q, R, S:
P. Macrophage receptors recognise the invading virus.
Q. The virus is drawn into the macrophage.
R. The virus gets packaged into a sac pinched off from the cell membrane of the macrophage.
S. The sac fuses with lysozyme which safely dismantles the virus without digesting the macrophage itself.

1. I - Q, II- P, III- R, IV - S

2. I - P, II- R, III - Q, IV- S

3. I- R, II- P, III - Q, IV- S

4. I - S, II- P, III- Q, IV - R

Q. Which of the following is the secondary host in the case of blood fluke?

1. Snail
2. Pig
3. Man
4. Sand fly