| 1. | sexual contact with infected persons |
| 2. | transfusion of contaminated blood and blood products and sharing infected needles |
| 3. | placenta from the infected mother to her child |
| 4. | mere touch or physical contact |
| 1. | there are 4 heavy and two light chains |
| 2. | the chains are held together with disulphide bonds |
| 3. | an antigen binging site is present between two light chains |
| 4. | the light chains have secondary structures and the heavy chains have tertiary structure |
| 1. | produces complementary DNA with reverse transcriptase |
| 2. | produces complementary RNA with reverse transcriptase |
| 3. | uses the receptors of certain drugs located on lung cells |
| 4. | must be transmitted by a vector |
| 1. | immunomodulation by alpha interferons |
| 2. | Histopathology after taking a biopsy |
| 3. | CT Scan and MRI |
| 4. | Fiber optic endoscopy and FNAC |
| COLUMN I | COLUMN II | ||
| A | Morphine | P | Derived from poppy seeds, it is a strong painkiller |
| B | Alcohol | Q | In chronic cases, it can cause cirrhosis of liver |
| C | Nicotine | R | Derived from leaves of a plant, it is CNS stimulant and can cause hallucinations |
| D. | Cocaine | S | Stimulates adrenal medulla to release adrenaline and nor adrenaline |
| A | B | C | D | |
| 1. | Q | P | R | S |
| 2. | P | Q | S | R |
| 3. | R | S | Q | P |
| 4. | S | R | P | Q |
| Statement I: | Autoimmune disorder is a condition where body defense mechanism recognized its own cells as foreign bodies |
| Statement II: | Rheumatoid arthritis is a condition where body does not attack self cells |