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Corona virus | Additional Study Material for NEET PDF Download
Type of strains:-
There are seven strains of corona virus
- Human Coronavirus 229E (HCoV-229E)
- Human Coronavirus NL63 (HCoV-NL63, New Haven Corona Virus)
- Human Coronavirus OC43(HCoV-OC43)
- Human Coronavirus HKU1
- Middle East Respiratory Syndrome Related Coronavirus (MERS-CoV) previously known as novel coronavirus 2012 & HCoV-EMC
- Severe Acute Respiratory Syndrome Coronavirus, previously known as SARS CoV, or SARS Classic
- Severe Acute Respiratory Syndrome Coronavirus -2, (SARS CoV-2), previously known as 2019-nCoV, or “novel Coronavirus-2019”
How SARS CoV-2 infect human:-
Host ACE-2 protein act as receptor for this virus, ACE-2 protein recognize receptor binding domain on virus spike protein. After recognition and attachment, virus enter into host cell via two type of pathway.
The first pathway SARS CoV-2 follow to enter the host cell is enocytosis and uptake of the virus in endosomes. Host’s pH dependent cystein protease cathepsin L. cleave the receptor attached spike protein, when this receptor attached spike protein gets activated introduce a conformational change and the later fusion of viral envelope with the endosomes will occurs.
In second mechanism, the SARS CoV-2 can enter the host cell directly by proteolytic cleavage of the receptor attached spike protein by the host’s TMPRSS2 or TMPRSS11D serine protease activation of C-terminal part of the spike protein triggers the fusion of the viral envelope with host cell membrane by introducing conformation change.
After entry translation, as well as replication of viral genome takes place, and these particle assemble into several new virus & librated by exocytosis to infect more cells.
Refrence:-
Biotekzone.blogspot.com
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FAQs on Corona virus - Additional Study Material for NEET
| 1. What is the NEET exam? |  |
Ans. The NEET (National Eligibility cum Entrance Test) is a national-level entrance exam conducted in India for students seeking admission to undergraduate medical and dental courses.
| 2. How has the NEET exam been affected by the coronavirus pandemic? | |
Ans. Due to the coronavirus pandemic, the NEET exam has been rescheduled multiple times and faced delays. The exam dates were changed to ensure the safety of students and comply with government guidelines.
| 3. Is the NEET exam being conducted online or offline during the pandemic? | |
Ans. The NEET exam is conducted in offline mode, where students have to physically appear at designated examination centers to write the exam. Currently, there is no provision for an online NEET exam.
| 4. What safety measures are being taken during the NEET exam in light of the coronavirus situation? | |
Ans. To ensure the safety of students during the NEET exam, various safety measures are being implemented. This includes maintaining social distancing norms, mandatory use of face masks, sanitization of exam centers, and thermal screening of candidates before entering the premises.
| 5. Are there any special instructions or guidelines for NEET aspirants due to the coronavirus outbreak? | |
Ans. Yes, NEET aspirants are required to follow certain guidelines due to the coronavirus outbreak. They must carry their own hand sanitizer, transparent water bottles, and personal belongings. Sharing of any item is strictly prohibited to minimize the risk of virus transmission. Candidates are advised to regularly check official websites for updates and follow the instructions provided by the exam conducting authority.
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