1. Which of the following lymphokine(s) is secreted by delayed-type-hypersensitivity cells? A. Macrophage stimulating factor B. Migration inhibiting…

1. The class of immunoglobulins which can cross the placenta is A. IgM B. IgG C. IgA D.…

1. Which of the following infection(s) can be diagnosed by the use of polymerase chain reaction? A. HIV-1…

1. Which of the following enzyme is used for the synthesis of RNA under the direction of DNA?…

1. In DNA sequencing, the primer A. specifies where the sequence ends B. specifies where the sequence begins…

1. Organisms can synthesize ATP by oxidative phosphorylation when they A. ferment B. oxidize glucose to pyruvate C.…

1. The ability of Vibrio fischeri to convert chemical energy directly into radiant energy in bioluminescence is an…

1. Which of the following is not the characteristic of a growth curve? A. Shows development of microbial…

1. Which of the following is the necessary step for cultivating the microorganisms? A. Preparing a culture medium…

1. The gram-negative organisms is A. Actinomyces B. Bacillus C. Clostridium D. None of these 2. Catalase production…