Question

10. Under normal conditions, which of the following will have more bacteria. 83 383 131 A. Mouth B. Nose C. Blood 11. A clear zone around a disc containing an antibiotic indicates the bacteria are resistant to that antibiotic. A. True B. False 12. Ultra Violet (UV) light damages A. DNA B. mRNA C. tRNA D. None of the above 13. Ouchterlony test is a precipitation based test. A. True B. False 14. Blood Group B people have antibodies. A. Anti-B B. Anti-A C. Anti- le have

Answer 1

Question-10, mouth is correct answer because mouth and skin have more bacteria as compare to others. Other organs have barriers for their entry so less bacterium found there.

Question-11, false because clear zone means microbes in that region are killed by antibiotic so antibiotic sensitive microbes.

Question-12, a is correct answer because I DNA , they form thymidine dimer which cause mutations.

Question-13, true because both antigen and antibody are in soluble form .

Question-14, b is correct answer because blood group B has B antigen and A antibody.