Bio 1500 - Test 7 UPDATED ACTUAL Exam
Questions and CORRECT Answers
Structure of viruses - CORRECT ANSWER - - RNA or DNA
- capsid (protein)
- no cellular machinery
optional: envelope (lipid bi-layer), protein receptors
Features by which viruses categorized - CORRECT ANSWER - - shape/size of capsid:
spherical, head-tail, helical
- absence/presence of an envelope
- type of genetic material (RNA or DNA, double or single stranded, positive or negative sense)
general steps of viral reproduction - CORRECT ANSWER - 1. attachment (viral
glycoproteins match with receptor on cell)
2. entry (either whole thing enters or viral genome inserted)
3. replication & gene expression (viral genes direct cell machinery to make viral proteins)
4. assembly (viral proteins assembled into new virions)
5. release (either through the lysis of the cell or the individual virions pass through the cell
membrane and get an envelope)
features of coronaviruses - CORRECT ANSWER - - spherical
- envelope present
- positive sense RNA (straight up mRNA)
- most cause respiratory tract infections
- has spike proteins
- hundred of types
Questions and CORRECT Answers
Structure of viruses - CORRECT ANSWER - - RNA or DNA
- capsid (protein)
- no cellular machinery
optional: envelope (lipid bi-layer), protein receptors
Features by which viruses categorized - CORRECT ANSWER - - shape/size of capsid:
spherical, head-tail, helical
- absence/presence of an envelope
- type of genetic material (RNA or DNA, double or single stranded, positive or negative sense)
general steps of viral reproduction - CORRECT ANSWER - 1. attachment (viral
glycoproteins match with receptor on cell)
2. entry (either whole thing enters or viral genome inserted)
3. replication & gene expression (viral genes direct cell machinery to make viral proteins)
4. assembly (viral proteins assembled into new virions)
5. release (either through the lysis of the cell or the individual virions pass through the cell
membrane and get an envelope)
features of coronaviruses - CORRECT ANSWER - - spherical
- envelope present
- positive sense RNA (straight up mRNA)
- most cause respiratory tract infections
- has spike proteins
- hundred of types
