Consider the following statements:
I: | Plasmodium falciparum causes malignant tertian malaria. |
II: | Release of hemosiderin from burst RBCs is responsible for paroxysms of malarial attacks. |
III: | Sporozoites are the infectious forms of Plasmodium. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
Consider the following statements:
I: | Cancer is essentially a genetic disease caused by multiple mutational events. |
II: | Cancerous cells are rapidly dividing cells that exhibit contact inhibition. |
III: | Metstatsis is the most feared complication of any cancer. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
Consider the following statements:
I: | HIV is a retrovirus. |
II: | It infects and destroys the CD4 T-lymphocytes. |
III: | The newer antiretroviral drugs are a cure for HIV infection. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
Consider the following statements:
I: | Innate immunity is a non-specific type of defense that is present at the time of birth. |
II: | Acquired immunity is pathogen-specific and is characterized by memory. |
III: | Memory-based acquired immunity developed in higher vertebrates based on the ability to distinguish self from non-self. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II and III |
Study the diagram given and choose the correct statement:
1. | A: Retrovirus replicates outside the cell |
2. | B: Viral DNA is produced by the host's enzyme - reverse transcriptase |
3. | C: Viral DNA incorporates into the host genome |
4. | D: New viral DNA is produced by the infected cell |
In the given diagram, A and B respectively represent:
1. | The N and the C terminus of the polypeptide |
2. | The C and the N terminus of the polypeptide |
3. | The constant and variable regions of the antibody molecule |
4. | The variable and constant regions of the antibody molecule |
Consider the given stages in the life cycle of Plasmodium and choose the correctly matched pair:
1. | A | Merozites infect humans when mosquito bites |
2. | B | The parasite reproduces sexually in liver cells |
3. | C | Symptoms of malaria |
4. | D | Fertilization in the hemocoel of the mosquito |
Common cold is not cured by antibiotics because it is
1. caused by a Gram-negaive bacterium
2. not an infectious disease
3. viral disease
4. caused by a Gram-positive bacterium
Maturation of lymphocytes takes place in
(1) thymus
(2) Bone marrow
(3) Liver
(4) Both 1 and 2
Select the option where all columns are correctly matched:
Disease |
Causative organism |
Feature |
|
1. |
Malignant malaria |
Plasmodium ovale |
Cerebral involvement |
2. |
Typhoid |
Salmonella typhi |
Confirmed by the VDRL test |
3. |
Elephantiasis |
Wuchereria bancrofti |
Waterborne disease |
4. |
Ringworm |
Microsporum |
Intense itching |