11. Which of the following statement is/are correct about Teeth-hygiene 7
(i) = Periodontal disease is the commonest cause of tooth loss.
(ii) Enamel can repair by itself.
(iii) Dental plaque is protecting teeth from caries.
(iv) Halitosis is the term for bad breath.
(७) Only (i) ‏ع‎ (ii) (B) Only (i) & (iv)
(C) Only (ii) & (iii) (D) Only (iii) & (iv)

12. The following are ‘essential’ amino acids, except

)( Phenylalanine

(ii) Threonine

(iii) Methionine

(iv) Valine

)1( رق رت ‎(A)‏

(C) (iii) (D) None of the above
13. Which of the following statement is/are wrong about vitamins 7

(i) = Vitamin ‏رظ‎ (Thiamine) deficiency results in Beriberi.

(ii) Vitamin B, (Riboflavin) deficiency results in Pellagra.

(iii) Vitamin B,, deficiency results in Pernicious Anemia.

(iv) Vitamin C (Ascorbic Acid) is essential for wound healing.

(ಹ) Only (i) (8) Only (ii)

(C) Only (iii) (D) None of the above
14. Which of the following tests are used to assess the quality of pasteurized milk 7

(i) Phosphatase test

(ii) Standard plate count

(iii) Shick test

(iv) Coliform count

(A) Only (i), (ii) ಹ (iv) (B) Only (ii), (iii) & (iv)

(C) Only (i), (1) ಹ (iii) (D) All of the above
15. Which of the following bacteria are gram negative ?

(i) | Pneumococci

(11) Gonococci

(111) Meningococci

(iv) Streptococci

(७) Only (i) & (ii) (B) Only (i) & (iv)
(C) Only (ii) & (iii) (0) Allof the above
16. Which of the following methods of sterilization are working using the technique of dry
heat ?

(i) Hot air oven
(1) Autoclave
(111) Incinerator
(iv) Hospital sterilizer
(ಹ) Only (i) & (iii) (8) Only (1) & (iv)
(C) Only (ii) & (iv) (D) Only (ii) ಹ (iii)
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