Skip to main content
36 votes

Are red blood cells prokaryotic?

When differences between prokaryotes and eukaryotes are taught in an introductory biology course, a generic prokaryotic cell and a generic eukaryotic cell are typically compared. Cells in a complex ...
De Novo's user avatar
  • 8,811
19 votes
Accepted

Does cell culturing contribute to dangerous antibiotic resistance to the same degree as livestock?

Antibiotics are used in very different ways in cell culture and in livestock farming. As you note, in farming, antibiotics are used to manage infection in unsanitary conditions and also to increase ...
jakebeal's user avatar
  • 6,997
11 votes

Are red blood cells prokaryotic?

No. Prokayotic cells are full organisms with their own DNA, red blood cells are not.
swbarnes2's user avatar
  • 5,230
9 votes
Accepted

How do the three mechanisms of the 1000X improved "new" vancomycin work together?

This is typically for a paper under embargo - it can be accessed by registered journalists so they can cover the original article when it is published. The paper is now published, so I changed the ...
Chris's user avatar
  • 51.7k
7 votes

Will all bacteria become resistant against all antibiotics in the long term?

and there is not much evolutionary pressure to loose it The energetic cost of replicating antibiotic resistance genes in the absence of antibiotic selection is not trivial, and varies depending on ...
acvill's user avatar
  • 8,296
6 votes
Accepted

Have bacteria evolved antibiotic resistance in a laboratory setting?

Yes, many times. For just one example, see this paper; you could also see this review for numerous examples. These are examples of spontaneous mutations that lead to antibiotic resistance, so this ...
Bryan Krause's user avatar
  • 46.1k
6 votes
Accepted

Why is AMR not widespread?

Natural selection is environment-dependent. A mutation that makes an individual more fit in one context, might make it less fit in a different context. The mutations that make bacteria more fit in an ...
iayork's user avatar
  • 14.3k
6 votes
Accepted

Is bacterial resistance caused by underdosing?

In a 2017 analysis in The BMJ, Martin Llewelyn and colleagues addressed the question of whether it is good to advise people prescribed antibiotics to "finish the course".1 I've copied their ...
acvill's user avatar
  • 8,296
5 votes
Accepted

Why should benzalkonium chloride (an antifungal agent) be used during your laundry machine's "rinse" cycle, not its "wash" cycle?

The label of the veterinary product Fung-A-Way, which is Benzalkonium Chloride 0.15%, states that "Efficiency is neutralized by soap or detergent residues." The website http://www.mpbio.com has the ...
BlakeDavis's user avatar
5 votes

"Antibiotic resistance" equivalent in archaea for selection during cloning

Obviously, one can't use antibiotic resistance since they are not bacteria. This is not so obvious. Some common antibiotics are active against archaea.1 The Halohandbook, an indispensable document ...
acvill's user avatar
  • 8,296
5 votes

why don't antibiotics reduce our weight?

First, you present as fact that antibiotics therapy (say AT) does not reduce weight. To show this fact, a study must weigh persons before AT and after. Confounders to this measurement are 1. weight ...
R Stephan's user avatar
  • 3,850
5 votes
Accepted

Are red blood cells prokaryotic?

Are red blood cells prokaryotic? No! There are many more differences between procaryotes and eukaryotes than just the presence of a nucleus. See DeNovo's answer for more information. The terms ...
Remi.b's user avatar
  • 68.2k
4 votes
Accepted

Why does azithromycin not affect human mitochondria?

There are two general points that should be appreciated in relation to this question: Your statement that mitochondria “have prokaryotic ribosomes” is a misleading simplification. Although ...
David's user avatar
  • 26.2k
4 votes

Could plasmids and conjugation mechanisms be used against antibiotic-resistant bacteria?

If we assume all of these things could be practically done at least at some point in the future, here are the problems I see with the suggestions, and why they might not work (others may spot ...
Joe Healey's user avatar
  • 1,301
4 votes
Accepted

Are fluoroquinolone antibiotics (Cipro, Levaquin, etc) chemotherapy drugs?

Short answer: Yes, fluoroquinolones are chemotherapy drugs In layman's terms, fluoroquinolone antibiotics kill human cells as they divide. Fluoroquinolones are a class of drug called "...
Andy Ray's user avatar
  • 194
4 votes
Accepted

Why are aminoglycoside antibiotics particularly effective for aerobic gram negative bacteria?

Anaerobiosis is incompatible with effective intracellular accumulation of aminoglycoside antibiotics such as streptomycin and gentamycin. After an initial binding step involving outer membrane ...
Alan Boyd's user avatar
  • 22.8k
4 votes

Is there any kind of antibiotic effective against fungi?

Yes. The antibiotic (general microorganism “targeter”) you’re looking for is an antifungal. There are fewer ways to target fungi as opposed to bacteria, but we can target them nonetheless. The fungal ...
user50398's user avatar
4 votes

Are red blood cells prokaryotic?

No, they are matured (broken) reticulocytes without the net structure and ribosomal DNA, which themselves are matured (broken) normoblasts that have lost their nucleus. So basically they're the left ...
Damon's user avatar
  • 259
4 votes
Accepted

Why does tetracycline have such a broad spectrum of activity?

This is a tricky question. First of all, I wouldn't call tetracyclines "uniquely" broad spectrum. They are broad spectrum, but there are other drugs with equally broad coverage absent acquired ...
De Novo's user avatar
  • 8,811
3 votes

Why should benzalkonium chloride (an antifungal agent) be used during your laundry machine's "rinse" cycle, not its "wash" cycle?

Benzalkonium chloride is what's known as a quaternary ammonium cation, or quat. These are disinfectants commonly used in medical settings, for example. The mechanism of action is thought to be due to ...
CKM's user avatar
  • 8,119
3 votes

Could plasmids and conjugation mechanisms be used against antibiotic-resistant bacteria?

Could plasmids and conjugation mechanisms be used against antibiotic-resistant bacteria? Apparently yes. At least, it's plausible. The study is very new and, even though it was conducted in vivo, it ...
canadianer's user avatar
  • 17.8k
3 votes
Accepted

Is there any kind of antibiotic effective against fungi?

The term antibiotic typically refers to chemicals effective against bacteria. There are antimicrobial chemicals effective against fungi, and they are rather aptly called antifungals. In general, for ...
canadianer's user avatar
  • 17.8k
3 votes

Is taking a shower unnecessary if good bacteria surround our skin?

You can read about the guy here: http://www.livescience.com/52719-do-we-need-showers.html He uses soil bacteria from the Nitrosomonas genus, which can break down ammonia and product nitric oxide (NO). ...
inf3rno's user avatar
  • 4,460
3 votes

Is taking a shower unnecessary if good bacteria surround our skin?

the Phrase "good bacteria" doesn't mean it's not gonna be harmful to you . actually they called : normal flora . they are refer not just to bacteria they include all types of microorganisms . http://...
BlueFoxy's user avatar
  • 384
3 votes
Accepted

What does completing the course of antibiotics accomplish?

As anongoodnurse has mentioned in the comments, an incomplete course can allow weakly resistant stains to expand their population. As you mentioned, the antibiotic does not cause the bacteria to ...
WYSIWYG's user avatar
  • 35.6k
3 votes

What is the difference between an antibiotic and an antibacterial?

The word antibiotic refers to metabolic products (chemical compounds) of one microorganism that has detrimental or inhibitory effect to another microorganism. These are kind of chemotherapeutic ...
Alisha Sengupta's user avatar
3 votes
Accepted

How does drug-induced photosensitivity work?

Drug induced photosensitivity (DIP) refers to the development of a cutaneous disease in response to the drug chemical in combination with light. Only the drug or light alone cannot cause the reaction ...
Polisetty's user avatar
  • 3,687
2 votes

Why does azithromycin not affect human mitochondria?

The endosymbiotic theory states that eukaryotic mitochondria were once freely-living bacteria that somehow migrated into the cell and began a symbiotic relationship. However, just because the ...
Vance L Albaugh's user avatar
2 votes
Accepted

Antibiotic resistance of Staphylococcus epidermidis and S. warneri

Here some studies concerning the antibiotic resistance of Staphylococcus epidermidis and Staphylococcus warneri: Antibiotic resistance patterns of coagulase-negative staphylococcus strains isolated ...
Johnny's user avatar
  • 1,509
2 votes

why don't antibiotics reduce our weight?

Antibiotics can cause weight loss, though, especially as they are used in the clinically, they are more likely to cause weight gain than weight loss. This Lancet Infectious Diseases review is not a ...
De Novo's user avatar
  • 8,811

Only top scored, non community-wiki answers of a minimum length are eligible