Quiz 4 Questions Flashcards
Helical viruses have
Cylindrical capsid enclosing nucleic acid
A usual function of spikes on virus particles is to:
Attach the virus particle to the host
A reasonable definition of the term “helminth” is:
A parasite worm or close relative
Virus particles (virions) are almost within what size range?
b. 20-1000 nm
In the field of viruses that affect animals or plants, “transformation” means:
Turning a normal cell into a cancer cell
Lichens are life forms composed of what in symbiotic relationships?
fungi and algae
Viral diseases can be diagnosed by:
detection of specific nucleic acid sequences.
signs and symptoms
detection of specific antibodies
Plasmodium species microorganisms cause
Malaria
Prions are composed of:
protein only
Scabies is cause by:
an arthropod
Bacteriophage grown on bacteria on solid media form visible
plaques
A provirus is
A virus with its genetic material embedded in that of the host
A protozoal disease which is sexually transmitted is
trichomoniasis
Which of the following is NOT a method of culturing animal viruses?
On an agar plate
Moulds are usually routinely identified on the basis of
the microscopic appearance of their spore-bearing hyphae
Enveloped viruses have
d.
lipid layer, protein coat and genetic material
Which of the following statements about fungi is FALSE?
all fungi reproduce asexually
Viroids have
genetic material only
Which is incorrect? Fungal infections are:
often treated with penicillin
Which of the following is not in the bacteriophage lytic cycle?
Integration of phage genome into host genome
A latent virus infection is
An inactive virus infection with the potential to become active and cause disease
Place the steps of viral multiplication in the correct order.
1-release, 2-maturation, 3-adsorption, 4-uncoating, 5-penetration, 6-biosynthesis
3, 5, 4, 6, 2, 1
1-release, 2-maturation, 3-adsorption, 4-uncoating, 5-penetration, 6-biosynthesis
Large seaweeds that mostly grow at moderate depth in the ocean mostly belong to the:
brown algae
Which virus is well known for causing cancer in humans?
Human papilloma virus
Fungi can be reliably distinguished from plants because they
do not contain chlorophyll
To see the structure of viruses, it is necessary to use
an electron microscope
Which of the following viruses causes glandular fever and can also sometimes cause cancer?
Epstein Barr virus
Many fungi thrive where bacteria cannot grow . This is because
Fungi can tolerate extremes of osmotic pressure
Bacteria resemble viruses in that thay have
Genetic material composed of nucleic acid
Which of the following is true about viruses? They have RNA or DNA b. They cannot metabolise nutrients c. They are not composed of cells Correctd. All of the above
a. They have RNA or DNA
b. They cannot metabolise nutrients
c. They are not composed of cells
