BIO 250 MODULE 3 EXAM UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
Question:
1. define virus
Answer:
small, infectious particles, nonliving, cannot reproduce independently,
transmissible
Question:
2. define transmissible
Answer:
able to spread from one host to another
Question:
3. parts of a virus
Answer:
genetic material (nucleic acids, DNA or RNA), protein coat (capsid), lipids
Question:
4. enveloped virus
Answer:
have lipid bilayer envelope around capsid, capsid, the lipid comes from the host,
nucleic acids, less resistant
Question:
5. define capsid
Answer:
protein shell that protects nucleic acids, carried enzymes/proteins for virus
Question:
6. nonenveloped virus
Answer:
"naked" viruses, lack envelope, more resistant to disinfectants, capsid, nucleic
acids, cell makes DNA, virus does not bring RNA, virus brings protein to make
RNA if needed
, Question:
7. what is a prion
Answer:
misfolded form of a normal protein, proteinaceous infectious agent composed of
protein, no nucleic acids (DNA or RNA), linked to slow fatal human death, cause
an original protein to change into another protein (changes shape of normal
protein to match protein of disease)
Question:
8. how do prions reproduce
Answer:
prions casue other proteins to misfold
Question:
9. icosahedral
Answer:
radial symmetry, based on icosahedron, a polyhedron with 20 identical triangular
sides, no extra layers, stable and efficient, made of repeating proteins, looks like a
ball or crystal, herpes
Question:
10. filamentous
Answer:
helical symmetry, tube around genome, generates flexible filaments, long strings
of filaments, long and slender, ebola
Question:
11. complex ailed bacteriophages
Answer:
head (icosahedral protein package, contains genetic material), tail injects genetic
material into host cells (viral package never enters cell, it injects like a syringe)
Question:
12. amorphous
Answer:
no symmetrical shape, flexible "core wall" which contains genetic material, viral
envelope (lipid) studded with spike proteins for attachment
Question:
13. double stranded DNA in a virus
Answer:
normal replication that occurs in the nucleus because there is DNA polymerase
QUESTIONS AND CORRECT ANSWERS
Question:
1. define virus
Answer:
small, infectious particles, nonliving, cannot reproduce independently,
transmissible
Question:
2. define transmissible
Answer:
able to spread from one host to another
Question:
3. parts of a virus
Answer:
genetic material (nucleic acids, DNA or RNA), protein coat (capsid), lipids
Question:
4. enveloped virus
Answer:
have lipid bilayer envelope around capsid, capsid, the lipid comes from the host,
nucleic acids, less resistant
Question:
5. define capsid
Answer:
protein shell that protects nucleic acids, carried enzymes/proteins for virus
Question:
6. nonenveloped virus
Answer:
"naked" viruses, lack envelope, more resistant to disinfectants, capsid, nucleic
acids, cell makes DNA, virus does not bring RNA, virus brings protein to make
RNA if needed
, Question:
7. what is a prion
Answer:
misfolded form of a normal protein, proteinaceous infectious agent composed of
protein, no nucleic acids (DNA or RNA), linked to slow fatal human death, cause
an original protein to change into another protein (changes shape of normal
protein to match protein of disease)
Question:
8. how do prions reproduce
Answer:
prions casue other proteins to misfold
Question:
9. icosahedral
Answer:
radial symmetry, based on icosahedron, a polyhedron with 20 identical triangular
sides, no extra layers, stable and efficient, made of repeating proteins, looks like a
ball or crystal, herpes
Question:
10. filamentous
Answer:
helical symmetry, tube around genome, generates flexible filaments, long strings
of filaments, long and slender, ebola
Question:
11. complex ailed bacteriophages
Answer:
head (icosahedral protein package, contains genetic material), tail injects genetic
material into host cells (viral package never enters cell, it injects like a syringe)
Question:
12. amorphous
Answer:
no symmetrical shape, flexible "core wall" which contains genetic material, viral
envelope (lipid) studded with spike proteins for attachment
Question:
13. double stranded DNA in a virus
Answer:
normal replication that occurs in the nucleus because there is DNA polymerase
