3
votes
1answer
77 views

Is the swimming pool water harmful to frogs who jump in? If so, how?

Here is an odd question: Frogs have permeable skin. Indeed, via capillary action, frogs absorb water through their skin. Chlorine is in principle a harmful substance. I am sure what percentage of ...
3
votes
2answers
37 views

Madrid, Noise by the river: Bird or cricket?

I currently live in Madrid, Spain. In July there was a loud animal near the river, in an out of town area surrounded by grassland, with trees along the river. It's continued into August, though it ...
8
votes
2answers
98 views

If Tumors have lots of mutations in them how is it the immune system can't detect them?

If a cancerous tumor has a lot of mutations in them why can't the immune system detect them? If a person has cancer could this somehow alter the person's immune system so it doesn't function ...
2
votes
1answer
39 views

If nerve consists of many axons, where are then their soma located?

This question has haunted me for two years. Wikipedia mentions : A nerve is an enclosed, cable-like bundle of axons (the long, slender projections of neurons) in the peripheral nervous system. ...
0
votes
1answer
44 views

How long do human egg cell grow up?

I read article about alcohol harm where written that child may bear with birth defect cause mother used to drink alcohol 10 years ago so egg cell stay damages that long. I don't believe that human ...
0
votes
1answer
42 views

What is possibly wrong with my gel electrophoresis when i don't see bands of DNA ladder? [closed]

![enter image description here][1] What was possibly wrong in my gel electrophoresis when I didn't see bands of DNA ladder? I'm running a 2% electrophoresis gel (65v for 2h) to confirm the presence ...
0
votes
1answer
49 views

Drinking soda triggers tingling on a tiny spot on my upper back… but how? [closed]

The title pretty much says it all. Yes, I know it doesn't make sense. That's why I'm baffled. For the past week or two, I've noticed that drinking soda seems to cause a tingling/stinging sensation ...
9
votes
2answers
77 views

Cause of hexadactylisim in Amish people

Is it caused by inbreeding of many generations within an isolated population?
7
votes
1answer
56 views

How do plants benefit from their seeds being buried?

Common planting advice, when starting many plants from seed, is to bury the seed some small distance under the soil. It seems like most plants (at least members of class Dicotyledonae) will grow a ...
2
votes
1answer
29 views

Do “virgin” ant queens ever shed their wings?

In species that reproduce sexually, if an ant queen goes on a nuptial flight and does not successfully mate, will she still shed her wings and try to found a colony (although she probably won't ...
3
votes
1answer
24 views

What is the C765-Gal4 driver? [closed]

What is a gene driver and what does C765 stand for? Is Gal4 a transcription factor? Source: "Dynamics of Dpp Signaling and Proliferation Control"
1
vote
1answer
39 views

How to synthesize and isolate single stranded cDNA from an RNA template?

I would like to have pure single stranded cDNA of my choice. I am thinking of reverse transcription from RNA (obtained by in vitro transcription), degrading RNA from RNA-DNA hybrid with RNase-H, ...
9
votes
1answer
42 views

Use of Gene Guns

Gene guns (biolistic particle delivery systems) use gold or tungsten atoms coated with plasmid DNA and bombard it on cells. Their use, as far as I understand, is mostly limited to plant cells. From ...
3
votes
0answers
36 views

L-tryptophan in mammalian cell culture

Why must the concentration of L-tryptophan be kept to a relatively low level when culturing mammalian cells? It's an essential amino acid, so I cannot fathom why low concentrations as opposed to ...
2
votes
1answer
28 views

Can stress-induced cortisol reduce diabetes type I?

Let us consider a patient with type 1 diabetes. I think it would be safe to say that diabetes is an autoimmune disease. Now let us suppose this patient comes under stress. As far as I know, cortisol ...
1
vote
2answers
19 views

What are blood group determinants? [closed]

I am trying to understand if they are the same as the blood antigens. The books I have tried to read say something about them being the antigens on the surface of the red blood cell.
3
votes
1answer
32 views

Any examples of animal behavior in response to meteor showers?

I just spent two nights observing the Perseids and was wondering whether any animals have been recorded to exhibit unusual behaviour in response to meteor showers. It is known that some animals ...
2
votes
1answer
31 views

Bright green caterpillar with long white stripes, few hairs, no extensions, possibly Noctuidae

Our herbs had strange holes, and we found eight of these caterpillars to be the reason. They were mainly underneath the leafs and measured about 5 cm in length. We collected them from the herbs, put ...
0
votes
2answers
61 views

Molecular graphics

anybody know of some great free molecular graphics systems that can allow for PDB code input? I prefer that it doesn't use Java. I also prefer that it is online, although if there is a great system ...
3
votes
1answer
41 views

Is sequencing error a function of the nucleotide being read?

Checking out on Google Scholar, I can see that for Illumina (just to consider one example) the sequencing error rate is of the order of 0.001-0.01 per nucleotide. Talking about sequencing error, ...
0
votes
1answer
26 views

Coalescence time: Is it different for haploids and diploids in population genetics?

I'm trying to model Cyanobacteria cells divergence in 2 populations with mutation rate $-\mu$ and I need to verify my model with a valid theory. I don't have much biology background and all the ...
0
votes
0answers
32 views

Help with species identification

Could someone help with identification of this small mammal? Is it a possum? A dormouse? It was photographed in Sukhumi botanical garden, in Abkhazia.
2
votes
1answer
21 views

How do catenanes form when DNA replicates?

So I am taking a course in DNA replication and repair. And we are talking about catenanes forming when DNA replicates (two circles of dsDNA interlinked) How is this possible?
5
votes
2answers
41 views

How many copies of a gene?

I am studying mathematical models of transcription and translation and I am wondering: In a particular genome, how many copies of a gene coding for one particular protein should one expect? Are they ...
4
votes
1answer
63 views

Why do cats like enclosed spaces (e.g. boxes) so much?

A recent article doesn't reach a firm conclusion, but offers two possible explanations. Hiding is a behavioral strategy of the species to cope with environmental changes and stressors. It ...
1
vote
0answers
8 views

How are split inteins joined?

Do they form a peptide bond? Or is it just some affinity/van der Waals interaction? Is the mechanism enzyme catalized? Are the residues/moieties at the join site known? Could they be introduced to ...
4
votes
1answer
60 views

Fruit-bearing tree identification

Just moved into a new house in Puerto Rico and I found this tree in the back garden. Can anyone tell me what tree this is, and whether its fruit is edible?
1
vote
0answers
21 views

Is a Ribonuclease Inhibitor protein the only mechanism employed by the human cell to protect cellular RNA from degradation by endoribonuclease?

Are there any other methods of protection for cellular RNA from degradation by endonuclease (specifically the Pancreatic Ribonuclease RNase II (Eosinophil-derived neurotoxin) and RNase III (Eosinophil ...
1
vote
0answers
28 views

Choice of biological energy storage forms

According to this table, gasoline has a specific energy noticeably higher than fat and more than twice that of carbohydrates; even short-chain hydrocarbons like ethanol and even methanol offer an ...
0
votes
1answer
33 views

Extinction of species with extant descendants

From what I've seen, species such as Homo heidelbergensis which have extant descendants are classified as extinct, which makes sense as far as it goes. However, given that species exhibit a continuum ...
1
vote
0answers
14 views

Do bacteria develop a resistance to antimicrobial peptides at the same rate as against “regular” antibiotics?

From what I understand, antimicrobial peptides are roughly grouped into three structural sets, with large variations present between different groups as well as within the groups. Their anti-microbial ...
1
vote
0answers
18 views

What is the efficacy of an Ebola antibody response

There is contradictory (~?) evidence in the literature that antibody responses against Ebola are effective in clearing the virus and protecting the patient. Some time ago, I wrote a bit about the ...
0
votes
1answer
57 views

How much penicillinase is needed to deactivate 125mg of amoxicillin?

How much penicillinase is needed to deactivate 125mg of amoxicillin? Penicillinase in penase concentrate from CPC. 20,000 Levy Units/ml/min I need IU of 125 mg of amoxicillin. Please note that the ...
4
votes
0answers
21 views

Can Biting Insects Detect Specific Places On A Host Body?

I'm gonna make a presumptive statement: It -seems- as though I get bitten by mosquitos and other biting insects in -exactly- the same places over and over. I mean within a few mm. Is that true? If ...
1
vote
0answers
17 views

GO term for orthologous gene IDs

I have a list of orthologous gene IDs from the first supplementary file in here. The gene IDs are of the following type: ...
8
votes
1answer
747 views

Did not understand a small excerpt from a research paper

Was going through this paper, among multiple things that i did not understand, I came across this part: Each amino acid residue of a single window was encoded into a unitary bit string of length ...
2
votes
1answer
27 views

Testing CO₂ for cell culture

I'm am refurbishing some old CO2 incubators. I would like to test the precision of the CO2 sensor. There is a sample port on this incubator. What sorts of methods are commonly used to measure CO2 in ...
2
votes
1answer
20 views

Is there a good site or software to see if a primer pair spans an exon junction?

I am going to perform some RT-qPCR tests to validate an experiment.  I'm currently in the process of ordering primers, and I would like to get them from the Harvard Primer Bank since these have been ...
-1
votes
0answers
10 views

What the distinct difference between RNA polymerase IV and V? [closed]

I am aware that they both transcribe siRNA. I don't full understand the differences that set them apart.
1
vote
1answer
12 views

What was the first gene(s) found to code for ncRNA

I could not find a source that states what the first gene found to code for ncRNA was. Someone told me, however, it was a gene that coded for either rRNA or tRNA. To this point in time I have had no ...
0
votes
1answer
16 views

What motivates birds to make birdsong?

I was pondering the question "Why do humans make music?" and on an intuitive level, my answer was "because of the feelings it evokes of course!" But I then wondered, what about songbirds? Does a ...
3
votes
0answers
23 views

How is atrophied muscle different than normal muscle in a chemical or biological way?

I am a writer with a question for a story I'm working on. In it, the character suffers from muscle atrophy due to spinal damage. So that I can portray this accurately, what would cause this type of ...
5
votes
1answer
87 views

Mouse Colony Software

I am looking for a good mouse colony census program that tracks the mice we have in the lab, breeding success of breeders, lineages, multiple user access, etc. Jackson labs has a program that does ...
0
votes
0answers
7 views

Endothermy in different species

Birds and mammals are both endothermic, meaning they metabolically generate the heat they need to keep their body within a certain temperature ranger. But birds are closer relatives to reptiles than ...
0
votes
0answers
9 views

What is the best aCGH normalization procedure for hyper-ploid tumor samples?

I'm currently working on aCGH data of Triple Negative Breast Cancer patients xenografts and primary tumor samples. A substantial amount of my samples is highly aberrated which leads to offsets of the ...
2
votes
0answers
32 views

Thinking quickly causes elevated mood

I read this article: http://www.sciencedaily.com/releases/2006/09/060926171045.htm It says, "When people are made to think quickly, they report feeling happier as a result. They also say they are ...
1
vote
0answers
23 views

What are the exact differences between stereocilia and microvilli?

This is a question in an old exam of Histology. I tried to answer the question, and I've made many searching attempts, but without resulting in any fixed/exact information. In some articles on the ...
3
votes
0answers
31 views

What is this ground dwelling, funnel web spider in Montana?

I've killed dozens of what appears to be the same type of spider. I've included pictures of 2 individuals. I've seen them in all sizes from 1-4". I'm in Missoula Montana. They're aggressive, they ...
2
votes
1answer
44 views

Will salting the ground kill insects and spiders?

I want to kill the insects and spiders living in my egress using something non-toxic to humans, dogs. I was thinking copious amounts of salt would kill earth dwelling bugs and what appears to be ...
0
votes
0answers
27 views

GMO Patents: Organism specifc or generic [migrated]

If a patentee actually expresses recombinant gene-X in organism-A does that give him the right to also claim this gene-X in other organisms? All other organisms? If not how broadly? Too broad sounds ...

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