Microbe Mission B/C

Test your knowledge of various Science Olympiad events.
yang573
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Re: Microbe Mission B/C

Postby yang573 » May 8th, 2017, 7:18 pm

1a. What are obligate intracellular parasites?
1b. Name two cellular examples.
1c. For the two examples, describe how they enter a host cell.
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Re: Microbe Mission B/C

Postby The48thYoshi » May 9th, 2017, 9:40 am

1a. What are obligate intracellular parasites?
1b. Name two cellular examples.
1c. For the two examples, describe how they enter a host cell.
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1a. Obligate intracellular parasites are microbes that can not reproduce outside of a host cell 1b. I believe rickettsia and chlymidia 1c. Rickettsia are arthropod borne and chlamydia is sexually transmitted?
What is the disease mechanism of Dutch Elm
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Re: Microbe Mission B/C

Postby yang573 » May 9th, 2017, 12:21 pm

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1a. Obligate intracellular parasites are microbes that can not reproduce outside of a host cell 1b. I believe rickettsia and chlymidia 1c. Rickettsia are arthropod borne and chlamydia is sexually transmitted?
For 1c, I was looking for how the bacteria enter a host cell. Specifically Rickettsia and Chlamydia induce phagocytosis but avoid destruction within the cell.
What is the disease mechanism of Dutch Elm
Answer
The two pathogenic species of [i]Ophiostoma[/i] germinate in the xylem and steal nutrients from the host tree.
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Re: Microbe Mission B/C

Postby The48thYoshi » May 9th, 2017, 12:29 pm

-
1a. Obligate intracellular parasites are microbes that can not reproduce outside of a host cell 1b. I believe rickettsia and chlymidia 1c. Rickettsia are arthropod borne and chlamydia is sexually transmitted?
For 1c, I was looking for how the bacteria enter a host cell. Specifically Rickettsia and Chlamydia induce phagocytosis but avoid destruction within the cell.
What is the disease mechanism of Dutch Elm
Answer
The two pathogenic species of [i]Ophiostoma[/i] germinate in the xylem and steal nutrients from the host tree.

For my question, I has looking for
My Answer
The fungus resides in the xylem and the tree kills itself when it blocks its own xylem tissue to prevent the fungus from spreading
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Re: Microbe Mission B/C

Postby allopathie » May 10th, 2017, 7:19 am

I'll jump in: what are five specific (think molecular) adaptations of hyperthermophilic archaea?
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Re: Microbe Mission B/C

Postby whythelongface » August 19th, 2017, 5:46 pm

I'll jump in: what are five specific (think molecular) adaptations of hyperthermophilic archaea?
I did have to Google some of this but oh well, the more you know, the more you know!
1. Heat-stable enzymes (eg. polymerases)
2. High levels of saturated FAs in membrane
3. Ether instead of ester linkages
4. Many HSPs
5. Tetraether monolayers
Okay, I had to search a lot of this up... archaea are hard...
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Re: Microbe Mission B/C

Postby NeilMehta » August 20th, 2017, 7:02 am

I'll jump in: what are five specific (think molecular) adaptations of hyperthermophilic archaea?
I did have to Google some of this but oh well, the more you know, the more you know!
1. Heat-stable enzymes (eg. polymerases)
2. High levels of saturated FAs in membrane
3. Ether instead of ester linkages
4. Many HSPs
5. Tetraether monolayers
Okay, I had to search a lot of this up... archaea are hard...
New question, I guess:
list all of the different types of RNA
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Re: Microbe Mission B/C

Postby Alex-RCHS » August 20th, 2017, 7:47 am

New question, I guess:
list all of the different types of RNA
My answer
Ribosomal RNA (rRNA), Messenger RNA (mRNA), tranfer RNA (tRNA).
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Re: Microbe Mission B/C

Postby whythelongface » August 20th, 2017, 9:49 am

Small interfering RNA (siRNA) should also be included, but it's kind of moot.
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He went out and hanged himself and then there were none."

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Re: Microbe Mission B/C

Postby Alex-RCHS » August 20th, 2017, 9:58 am

Small interfering RNA (siRNA) should also be included, but it's kind of moot.
Good point. There's really a lot of different RNA types though: https://en.m.wikipedia.org/wiki/List_of_RNAs
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Re: Microbe Mission B/C

Postby whythelongface » August 20th, 2017, 12:00 pm

Fair. You certainly included the three that you're most likely to see on the test, but I'd say know the five really important ones: mRNA, tRNA, rRNA, miRNA, and siRNA.
WEST WINDSOR-PLAINSBORO HIGH SCHOOL SOUTH '18
EMORY UNIVERSITY '22
SONT 2017 5th Place Medalist [Microbe Mission]

"One little Sciolyer left all alone,
He went out and hanged himself and then there were none."

Congratulations to WW-P South for winning 14th place at Nationals!

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Re: Microbe Mission B/C

Postby Alex-RCHS » August 20th, 2017, 12:33 pm

Oh, I forgot I need to ask a new question.

Fill in the blanks:
In all forms of fluorescence microscopy the excitation wavelength is _______ than the emission wavelength, except in the case of __________.

Edit:
Answer, for posterity
lower; multi photon excitation microscopy
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