CMMB 421 Practice Exam with 100% Correct Answers | Verified | Latest 2024 Version

CMMB 421 Practice Exam with 100% Correct Answers | Verified | Latest 2024 Version How many coronaviruses infect humans?Seven. How many genera are there based on genome homologies among coronaviruses?Three Can you name the two subfamilies of coronaviruses based on genome homologies?Alpha-CoV and Beta-CoV. What are the names of the three coronaviruses responsible for severe respiratory illnesses?SARS-CoV-1, SARS-CoV-2, MERS-CoV. Besides respiratory illnesses in humans, what are some important veterinary diseases caused by coronaviruses?Feline infectious peritonitis, infectious bronchitis in animals, and murine hepatitis. How was SARS-CoV transmitted?Through direct contact and aerosol droplets. How does SARS-CoV-2 differ from SARS-CoV in terms of the known animal reservoir?SARS-CoV has a known animal reservoir (civet cats), while the animal reservoir for SARS-CoV-2 is unclear. What distinguishes the pattern of human-human transmission between SARS-CoV and SARSCoV-2?SARS-CoV's human-human transmission was largely limited to hospitals, whereas SARS-CoV-2 exhibits widespread transmission in communities. How does the timing of transmission after symptoms differ between SARS-CoV and SARS-CoV2?SARS-CoV showed no transmission until approximately 24 hours after symptoms, whereas SARS-CoV-2 can be transmitted by individuals with asymptomatic or mild symptoms. What is a common feature between SARS-CoV and SARS-CoV-2 regarding the receptor they use?Both viruses use ACE2 as a receptor. What is the level of homology at the amino acid sequence between SARS-CoV and SARS-CoV2?> 90% homology at the amino acid sequence level. What type of virions do coronaviruses have?Enveloped virions containing helical nucleocapsids.