BESC 204 Exam 2 2024-2025 Exam
Questions Marking Scheme New
Update
Phytophthora infestans - Answers -the fungus that caused Late Blight of Potato
Direct germination - Answers -germination by hyphal growth
Indirect germination - Answers -germination by zoospore formation
Antheridium - Answers -"male" part of oomycete sexual reproduction
Plasmopora viticola - Answers -fungus that causes the disease Grape Downy Mildew
Obligate pathogen - Answers -The pathogen can only complete their development on a living host.
Ex. Rusts
Obligate biotroph - Answers -pathogens that extract nutrients only from living plant tissues and cannot
grow apart from their hosts.
whiplash flagella - Answers -type of flagellum with no hair-like structures
tinsel flagella - Answers -type of flagellum with many hair-like structures attached
germ theory - Answers -the theory that all contagious diseases are caused by microorganisms
peptidoglycan - Answers -main wall polymer of bacteria
penicillin - Answers -antibiotic produced naturally by certain blue molds
mode of action: it prevents the cross-linking of small peptide chains in peptidoglycan.
cephalosporin - Answers -one of several broad spectrum antibiotic substances obtained from fungi and
related to penicillin
similar mode of action as penicillin; it affects the peptidoglycan
griseofulyin - Answers -fungistatic antibiotic, that is it will inhibit the fungal growth and does not kill fungi; it
is not fungicidal
effective against fungal infections of hair, nail, and sking
Mode of Action: inhibits microtubule dynamics
fusic acid - Answers -
cilofungin - Answers -a semi-synthetic antibiotic
developed to combat Candida albicans
, cyclosporine - Answers -immuno-modulator (depresses active immune system)
helpful for diabetics to free them from insulin injections
prevents rejection from transplants
lovastatin - Answers -inhibits cholesterol synthesis by blocking the action of an Enzyme HMG-CoA
redcutase
secondary metabolite - Answers -products of metabolism that are not essential for normal growth,
development or reproduction of an organism.
mycotoxin - Answers -A secondary metabolite produced by fungus that is toxic to humans and/or animals
turkey-x disease - Answers -the disease that caused 100,000 turkeys to die and mycotoxins to be
discovered.
aflatoxin - Answers -Aspergillus flavus
Primary site of action is the liver.
Commonly associated w/ liver cancer.
It was discovered when the Turkey-disease occurred and killed 100,000 turkeys in Europe. They realized
all of the turkey's had eaten the same peanut meal which the fungus Aspergillus flavus was growing on.
Peanuts and corn are susceptible
zearelenone - Answers -Fusarium toxin
It mimics estrogen, causes malformation of female reproductive organs
fumonisin - Answers -Toxin caused by Fusarium moniliforme
Causes hole in the head disease in horses (equine encephalomalacea)
Causes throat cancer
Found in corn growing regions throughout the world
tricothecene (T-2) - Answers -Fusarium tricinctum
Esophageal problems (strangulation)
Associated w/ Alimentary Toxic Aleukia (ATA) in animals and humans (bleeding from nose/throat,
subcutaneous hemorrhages, deterioration of throat tissue, low leukocyte counts)
Produced on grain (wheat, oat, etc.) that is stored in damp conditions, or is left in the field unharvested
over winter
anencephaly - Answers -serious developmental defect of the central nervous system in which the brain
and cranial vault are grossly malformed
birth defect
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Stuviaascorers. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
