21. Enzymes are mainly

1. 1. Carbohydrate

   
   
   

   2. Protein

   
   
   

   3. Lipids

   
   
   

   4. Amino acid

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

---

22. Contaminated water can cause the following diseases except which one of the following?

1. 1. Hepatitis A

   
   
   

   2. Typhoid

   
   
   

   3. Measles

   
   
   

   4. Cholera

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

---

---

23. Water percentage in plasma is

1. 1. 60%

   
   
   

   2. 70%

   
   
   

   3. 80%

   
   
   

   4. 90%

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

   N/A

---

24. Which one of the following statements regarding starch and cellulose is not correct

1. 1. Both of them are of plant origin

   
   
   

   2. Both of them are polymer

   
   
   

   3. Both of them given colour with iodine

   
   
   

   4. Both of them are made up of glucose molecules

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

---

---

25. Which one of the following disease is caused by bacteria and spread though faecal matter by houseflies?

1. 1. Pertusiss

   
   
   

   2. Typhoid

   
   
   

   3. Diphtheria

   
   
   

   4. Chicken pox

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

---