Questions

QUESTIONS

(A)   Fill in the blank:

1. Diseases that are caused due to entry of ______ are called Infectious discuses.

Ans: (Pathogen)

2. Diseases that can spread from one person to another are called ______ diseases.

Ans: (Communicable)

3. Dysentery is a disease caused due to contaminated _____.

Ans: (water)

4. Cold and cough are ______ diseases.

Ans: (Air-borne)

5. Malaria is caused by a parasite known as ______.

Ans: (Plasmodium)

6. Malarial parasite is found in saliva of female mosquito ______.

Ans: (Anopheles)

7. The animals that can spread disease from patient to healthy persons are called as ______ of disease causing micro organisms.

Ans: (carriers)

8. Chicken-pox is an example of ______ disease.

Ans: (Viral)

9. Typhoid is a type of fever which is caused by ______.

Ans: (Bacteria)

10. Citrus canker is a bacterial disease found in ______.

Ans: (Plants)

11. ______ is done before the disease has occurred.

Ans: (Vaccination)

12. ______ is done after the disease has been caused by microorganism.

Ans: (Treatment)

13. Breeding of mosquitoes can be controlled by spraying ______ in collected, stagnant water.

Ans: (Insecticides)

14. Chemicals used for preserving food or other items are called as ______.

Ans: (Preservatives)

15. Micro organisms can cause harm by spreading ______ and spoiling ______.

Ans: (disease, food)

16. Sugar can inhibit the growth of bacteria which spoil food by reducing the _____ content in it.

Ans: (moisture)

17. Oil and Vinegar are examples of ______.

Ans: (Preservatives)

18. Milk and water are ______ to kill any harmful microbes that are present in them.

Ans: (boiled)

19. Low temperatures can ______ the growth of microbes.

Ans: (inhibit)

20. ______ method of preservation was discovered by Louis Pasteur.

Ans: (Pasteurization)

21. Conversion of atmospheric nitrogen into usable form by microbes or lightening is called as ______.

Ans: (Nitrogen fixation)

22. Atmosphere contains ______ of nitrogen gas.

Ans: (78%)

(B)   Match the following:

Ans:  1 – c; 2 – d; 3 – a; 4 – b

Ans: 1 – d; 2 – c; 3 – a; 4 – b

Ans: 1 – c; 2 – b;  3 – d; 4 – a

(C)   Multiple Choice Questions:

1. Which of the following disease is caused by virus?

(a) Polio                                          (b) Tuberculosis

(c) Malaria                                     (d) Dysentery

Ans: (a)

2. Which of the following disease is caused by bacteria?

(a) Dysentery    (b) AIDS            (c) Typhoid       (d) Malaria

Ans: (c)

3. Which of the following disease is caused by protozoan?

(a) Sleeping sickness                    (b) Cholera

(c) Food poisoning                       (d) Tuberculosis

Ans: (a)

4. Disease spread from infected person to healthy person through air, water and food called as-

(a) Infectious disease                  (b) Communicable disease

(c) Both                                           (d) None

Ans: (b)

5. Which of the following is a carrier of pathogen?

(a) Amoeba                                    (b) Rhizobium

(c) House flies                               (d) Fungus

Ans: (c)

6. Which of the following is a carrier of malaria parasite?

(a) Amoeba                                    (b) Rhizobium

(c) House flies                               (d) Female Anopheles Mosquito

Ans: (d)

7. Which of the following is a dangerous human and cattle disease caused by a bacterium?

(a) Polio             (b) AIDS            (c) Malaria        (d) Anthrax

Ans: (d)

8. Which is the negative impact of microorganism on human life?

(a) Soil fertility                             (b) Brewing industry

(c) Food poisoning                       (d) None

Ans: (c)

9. Sodium meta-bisulphite is a/an-

(a) Antibiotic    (b) Antibody     (c) Preservative (d) All

Ans: (c)

10. How sugar works as preservative?

(a) By reducing moisture content

(b) By reducing temperature

(c) By increasing temperature

(d) All

Ans: (a)

11. What is the effect of low temperature on microorganism?

(a) It reduces growth                   (b) It kills them

(c) Both                                           (d) None

Ans: (a)

12. The process of pasteurization was discovered by-

(a) Hill               (b) Louis            (c) Mendel         (d) None of the above

Ans: (b)

13. Which one is a symbiotic nitrogen fixer?

(a) Lactobacillus                          (b) HIV

(c) Rhizobium                               (d) Blue green algae

Ans: (c)