Question 4 :
Salt is used to preserve food by removing .......... from it.

Question 7 :
Inoculation of a suspension of killed or attenuated pathogenic micro-organisms to stimulate the formation of antibodies is known as

Question 9 :
The process of conversion of sugar into alcohol is called: - 

Question 10 :
________ are disease-causing organisms that are so small you need a microscope to see them.<br>

Question 13 :
Which among the following control measures would not help preventing the spread of malaria?<br/>

Question 21 :
Which of the following statements is incorrect?&#160;<br/>(i) The liver fluke, a parasite, depends upon intermediate hosts to complete its life cycle.<br/>(ii) The malarial parasite does not need a vector to spread to other host organisms.<br/>(iii) In the case of brood parasitism, the eggs of parasitic birds are not detected and removed from the nest because the parasite's eggs resemble the host's eggs in morphology and color.<br/>(iv) A population of frogs protected from all predators would increase indefinitely.

Question 24 :
Fish can be preserved for longer period of time by adding:

Question 25 :
W<span class="wysiwyg-font-size-medium">hich of the following are commonly used as food preservatives?</span>

Question 33 :
Nitrogen is one of the essential constituents&nbsp;of all living organisms as part&nbsp;of&nbsp;

Question 34 :
The bread becomes soft and porous when the yeast cells are mixed in the lump of dough of wheat flour, because:

Question 37 :
Match the items in column I with their preservation methods in column II and choose the correct&#160;<span>option from the codes given below.<br/></span><table class="wysiwyg-table"><tbody><tr><td>Column I</td><td>Column II</td></tr><tr><td>(a) Amla</td><td>(i) Sodium benzoate</td></tr><tr><td>(b) Vegetables</td><td>(ii) Drying</td></tr><tr><td>(c) Squashes</td><td>(iii) Cooling</td></tr><tr><td>(d) Spices</td><td>(iv) Oil and vinegar</td></tr><tr><td>(e) Ketchups</td><td>(v) Sugar</td></tr><tr><td></td><td>(vi) Salts</td></tr></tbody></table>

Question 38 :
Which disease among the following spread, if&#160;excreta from someone suffering from this disease&#160;get mixed with drinking water used by people&#160;living nearby?&#160;

Question 39 :
Pulse polio oral vaccine is provided only until the age of ___________.

Question 43 :
Match column I with column II and select the correct option from the codes given below.<table class="wysiwyg-table"><tbody><tr><td>Column I</td><td>Column II</td></tr><tr><td>(a) Pathogens</td><td>(i) Pathogen-carrying organisms</td></tr><tr><td>(b) Vaccination &#160; &#160; &#160; &#160;</td><td>(ii) Prevents the growth of micro-organisms</td></tr><tr><td>(c) Pasteurization</td><td>(iii) Microbes that cause diseases</td></tr><tr><td>(d) Vectors</td><td>(iv) Gives immunity</td></tr></tbody></table>