Microorganisms Friends and Foe Worksheet-3

Microorganisms Friends and Foe Worksheet-3

1. Among the diseases given below, which is true about the microorganisms which cause them and the symptoms of the diseases?       

(a) I only                                         (b) I and II only

(c) II and III only                          (d) I, II and III

2. Ringworm can be prevented by:

(a) vaccination

(b) vector control

(c) improving personal hygiene

(d) using antibiotics

3. Tuberculosis is spread by:

(a) mosquitoes                              (b) houseflies

(c) contaminated water              (d) coughing and sneezing

4. A bacterial cell divides once in every minute. It takes one hour to fill a cup. How much time will it take to fill half the cup?

(a) 32 minutes                              (b) 60 minutes

(c) 59 minutes                               (d) 29 minutes

5. Which of the following bacteria can live symbiotically?

(a) Rhizobium                               (b) Nitrosomonas

(c) Azotobacter                             (d) Clostridium

6. Cholera is caused by:

(a) Streptococcus                         (b) Clostridium

(c) Pasteurella                               (d) Vibrio

7. Bacteria living in the intestines of her­bivorous animals help in the digestion of:

(a) cellulose      (b) proteins       (c) fats                (d) vitamins

8. Fungi can be distinguished by:

(a) absence of chlorophyll

(b) presence of chitin in cell wall

(c) presence of plastids

(d) absence of chlorophyll & presence of chitin in cell wall

9. Bread mould is the common name of:

(a) Batrachospermum                (b) Rhizopus

(c) Agaricus                                   (d) Fusarium

10. Which one of the following produces antibiotic?

(a) Mucor          (b) Rhizopus     (c) Penicillium (d) Agaricus

Answer Key:

(1)-(b); (2)-(c); (3)-(d); (4)-(c); (5)-(a); (6)-(d); (7)-(a); (8)-(d); (9)-(b); (10)-(c)