Microbe Mission B/C

[Alex-RCHS]

The problem is, the bacteria in the picture does look comma-shaped, and it has those nice lophotrichous flagella, which makes it look like V. cholerae.

Obviously, upon closer examination, this is the stomach mucus lining. I didn't see the mucus part and assumed that the optimal growth pH defined the intestinal membrane - which is wrong too, the intestines would be far more basic than 5-6.

To test for ulcers, while not using an endoscopy - I'm guessing you meant the urea breath test as the non-invasive method?

The shape definitely looks more like V. Cholerae than H. Pylori, but V. Cholerae is monotrichous and H. Pylori is lophotrichous.

[fffurious]

Name the fermentation product(s) found in and the microbe used to ferment the following:
1) Swiss cheese
2) Yogurt
3) Beer

[sciduck]

Name the fermentation product(s) found in and the microbe used to ferment the following:
1) Swiss cheese
2) Yogurt
3) Beer

. (Click to Show Hidden Text)

Swiss Cheese: lactic acid from lactobacillus; lactic acid --> acetate, CO2, and propionic acid by propionibacterium
Yogurt: lactic acid - lactobacillus
Beer: ethyl alcohol - yeast

[JonB]

The problem is, the bacteria in the picture does look comma-shaped, and it has those nice lophotrichous flagella, which makes it look like V. cholerae.

Obviously, upon closer examination, this is the stomach mucus lining. I didn't see the mucus part and assumed that the optimal growth pH defined the intestinal membrane - which is wrong too, the intestines would be far more basic than 5-6.

To test for ulcers, while not using an endoscopy - I'm guessing you meant the urea breath test as the non-invasive method?

Breath test is what I was looking for. Good work! If you all want more questions, just ask me.

[sciduck]

The problem is, the bacteria in the picture does look comma-shaped, and it has those nice lophotrichous flagella, which makes it look like V. cholerae.

Obviously, upon closer examination, this is the stomach mucus lining. I didn't see the mucus part and assumed that the optimal growth pH defined the intestinal membrane - which is wrong too, the intestines would be far more basic than 5-6.

To test for ulcers, while not using an endoscopy - I'm guessing you meant the urea breath test as the non-invasive method?

Breath test is what I was looking for. Good work! If you all want more questions, just ask me.

Assuming I got the last one right (it's been a while since I've studied microbes...), you should post the next one! //I've gotten into the habit of writing easier questions because I only ever write for Div B.

Also, if you haven't already, uploading your previous tests to the test exchange would be extremely helpful.

[Alex-RCHS]

The problem is, the bacteria in the picture does look comma-shaped, and it has those nice lophotrichous flagella, which makes it look like V. cholerae.

Obviously, upon closer examination, this is the stomach mucus lining. I didn't see the mucus part and assumed that the optimal growth pH defined the intestinal membrane - which is wrong too, the intestines would be far more basic than 5-6.

To test for ulcers, while not using an endoscopy - I'm guessing you meant the urea breath test as the non-invasive method?

Breath test is what I was looking for. Good work! If you all want more questions, just ask me.

I would love to hear more questions from you (yours are refreshing and difficult)

[whythelongface]

Also, if you haven't already, uploading your previous tests to the test exchange would be extremely helpful.

+1. Please consider dumping a collection of problems, I don't think even Nationals questions challenge me like this.

[JonB]

I will get around to uploading an exam. Until then, a relatively straight forward question:

What are two differences between probiotics and prebiotics? Additionally, give two specific examples of human probiotics and two examples of human prebiotics.

[The48thYoshi]

I will get around to uploading an exam. Until then, a relatively straight forward question:

What are two differences between probiotics and prebiotics? Additionally, give two specific examples of human probiotics and two examples of human prebiotics.

If only we had you writing tests for the competitions we go to... (Click to Show Hidden Text)

prebiotics are nindigestible carbohydrates that act as good for probiotics, whereas probiotics are beneficial bacteria that have been linked with digestion benefits. Two examples of probiotic-rich foods are kefir and acidophilus milk. Some prebiotics include garlic and onion

[JonB]

I will get around to uploading an exam. Until then, a relatively straight forward question:

What are two differences between probiotics and prebiotics? Additionally, give two specific examples of human probiotics and two examples of human prebiotics.

If only we had you writing tests for the competitions we go to... (Click to Show Hidden Text)

prebiotics are nindigestible carbohydrates that act as good for probiotics, whereas probiotics are beneficial bacteria that have been linked with digestion benefits. Two examples of probiotic-rich foods are kefir and acidophilus milk. Some prebiotics include garlic and onion

Good answers! Your definitions are right on. Can you give me specific examples (such as genus and species) of (potentially) probiotic strains (there is plenty of debate out there whether they are helpful or not but certain species are used extremely commonly because they are thought to be beneficial)? Also, can you give two specific examples of prebiotic molecules? The class of molecule you gave is correct but I would want more specific examples.