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प्रश्न
A patient was given an anti-retroviral drug by the doctor.
What is the role of Reverse Transcriptase and Integrase in the life cycle of a retrovirus?
उत्तर
All retroviruses and associated retrotransposons use reverse transcription to complete their life cycle. Only the retroviral reverse transcriptase (RT) enzyme is capable of carrying out this intricate process, which involves turning viral single stranded RNA into integration competent double-stranded DNA. The enzyme invertase speeds up the attack of the 3'-hydroxyl group at the ends of the processed DNA on a pair of phosphodiester bonds in the target DNA.
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संबंधित प्रश्न
Distinguish between active immunity and passive immunity.
Which blood cells secrete antibodies?
The cell-mediated immunity insect the human body is carried out by:
Which of the following acts as a physiological barrier to the entry of microorganisms into the human body?
After getting into the person's body virus first enters into the
In the figure, structure of an antibody molecule is shown. Name the parts A, B and C. Show A, B and C in the diagram.
Highlight the structural importance of an antibody molecule with a diagram. Name the four types of antibodies found to give a humoral immune response, mentioning the functions of two of them you have studied.
The decrease in the T-lymphocyte count in human blood will result in ______.
| When a microorganism invades a host, a definite sequence of events usually occurs leading to infection and disease, causing suffering to the host. This process is called pathogenesis. Once a microorganism overcomes the defence system of the host, development of the disease follows a certain sequence of events as shown in the graph. Study the graph given below for the sequence of events leading to the appearance of a disease and answer the questions that follow: |
(a) In which period, according to the graph there are maximum chances of a person transmitting a disease/infection and why? (1)
(b) Study the graph and write what is an incubation period. Name a sexually transmitted disease that can be easily transmitted during this period. Name the specific type of lymphocytes that are attacked by the pathogen of this disease. (2)
OR
(b) Draw a schematic labelled diagram of an antibody. (2)
(c) In which period, the number of immune cells forming antibodies will be the highest in a person suffering from pneumonia? Name the immune cells that produce antibodies. (1)
A patient was given an anti-retroviral drug by the doctor.
Which disease was the patient diagnosed with?
