All Questions
0
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0answers
1 views
How people who lost their both legs produce red blood cells?
As I know just leg bones produce red blood cells. So, how people who lost their both legs produce red blood cells?
2
votes
0answers
12 views
Transcriptionally-mediated DNA damage
I'm researching the genetics of brain cancer, and finding a huge number of mutations in voltage-gated channels. It stands to reason that some of this DNA damage is due to the DNA being transcribed ...
5
votes
1answer
27 views
How does the human liver regrow?
I understand that there would have to be a portion of liver present to regrow from, so how much liver would the minimum to be able to regrow?
By what mechanism does regrowth occur?
-1
votes
0answers
18 views
Warning using DWD matlab package and results matrix not fully non negative
I am getting a strange warning using the DWD method (Distance Weighted Discrimination) to reduce batch effects on microarray data.
I am using matlab package provided here.
When I call BatchAdjustCC ...
0
votes
0answers
22 views
Multiple Systems Atrophy - clinical trials [closed]
My dad is currently suffering from MSA (multiple systems atrophy), a degenerative neurological disorder. He's lost a scary amount of weight, down to 118 lbs right now, and is starting to lose his ...
2
votes
1answer
22 views
What do rs id, allele coded 0 and allele coded 1 mean?
So, for a project I've been working on (different story), I've been looking at the HapMap Project, and their free online files. In their README file, they talk about how for each legend file for each ...
3
votes
0answers
31 views
Can ingestion of B6 cause gastrointestinal disturbance?
Can the ingestion of vitamin B6 upset the stomach, and if so by what mechanism?
1
vote
1answer
23 views
Like modern microprocessors, do human brains execute a similar form of “microprograms” as well?
A microprogram is the operation of microcode. That is, hardware and circuit specific operations implemented underneath machine code to tie the operations to the circuit and electronics themself ...
2
votes
1answer
21 views
Why is allolactose the LacI inducer?
For what reason(s) is allolactose, instead of lactose, the "natural" inducer of lac operon repressor?
0
votes
2answers
38 views
What nutritious insects exist to farm that require the least attention?
What nutritious insects exist to farm that require the least attention? I'm looking to automate simply, in a self regulating way.
Edit: To add detail, I imagine the insects would live densely in a ...
3
votes
0answers
39 views
Keyword based literature search
I understand this is not a biological question but this is often a problem whenever I look for literature.
How to look for a reference for some fact based on keywords. For instance you know about a ...
-1
votes
0answers
27 views
Does Regocin-F cream harmful to human body, if applied daily? [closed]
I have a wound that requires to apply Regocin-F cream daily . I found that if I stop using the medicine, the wound will deteriorate.
My question is, is the Regocin-F cream harmful to human body ?
...
3
votes
1answer
53 views
Why is funnel web spider venom so lethal to humans and not so much for other mammals?
According to the information from this article,
People and other primates are exquisitely sensitive to funnel web venom but, intriguingly, other mammals such as mice, rabbits, guineapigs, dogs ...
0
votes
1answer
50 views
Information Gene HBA2
Gene : HBA2? hemoglobin alpha 2 (Homo sapiens)
I don't find any tissues (or organs) in which the expression of this gene is strongest? What is the size of the gene (promoter off) encoding this ...
4
votes
1answer
44 views
What part of the brain controls depth perception?
Specifically the part of the brain that does depth perception based on binocular vision. I have searched all over the web and have turned up nothing. Is it the same part of the brain that processes ...
3
votes
1answer
103 views
Is a “Fact” any theory for which there is overwhelming evidence in any field other than biology?
Evolution is often described as a fact, and a theory. Evolution is a heavily overloaded term, with one definition being the fact that, "changes in the frequency of alleles in populations of organisms ...
2
votes
2answers
59 views
Are human males and females more genetically different than members of other species?
I'm looking at this Ted talk about a Saudi Arabia woman who dared to drive a car in the last few years. This reminds me that until the last century or so, women (all over the world?) enjoyed less ...
2
votes
2answers
49 views
By what mechanism does coeliac disease cause excess fat in the feces?
Wikipedia states that “Severe coeliac disease leads to the characteristic symptoms of pale, loose and greasy stool (steatorrhoea)”. However thumbing through the causes and the pathophysiology it did ...
3
votes
1answer
52 views
Precursor miRNA and a mature miRNA
What is the main difference between a precursor miRNA and a mature miRNA?
It is often the case that we have more than one precursor miRNA but only one mature miRNA. The miRNA-seq data contains only ...
4
votes
1answer
42 views
Why do neurons have a negative resting potential?
Neurons expend the majority of their energy powering ion pumps to maintain the chemical gradients that power their electrical activity. To have a negative resting potential, neurons leak potassium ...
1
vote
0answers
14 views
What is neutral genetic differentiation?
What is neutral genetic differentiation? Presumably it's a measure of the distance between organisms in terms of their genetics, but what does 'neutral' refer to?
0
votes
2answers
38 views
Why do antibiotics have a special importance when taking lactulose?
“Before taking lactulose, tell your doctor and pharmacist what prescription and nonprescription medications you are taking, especially antacids, antibiotics including neomycin (Mycifradin), and other ...
0
votes
0answers
20 views
Why do antacids have a special importance when taking lactulose?
“Before taking lactulose, tell your doctor and pharmacist what prescription and nonprescription medications you are taking, especially antacids, antibiotics including neomycin (Mycifradin), and other ...
2
votes
0answers
23 views
How is ammonia removed from the colon?
“Lactulose is also used to reduce the amount of ammonia in the blood of patients with liver disease. It works by drawing ammonia from the blood into the colon where it is removed from the body.” ...
3
votes
0answers
29 views
How do ants sense imminent rainfall?
I have always been told to watch to see if ant-hole mounds are built up as a sign of imminent rainfall. My questions are,
if what I have always been told is true, then by what mechanism do ants ...
2
votes
0answers
25 views
Eye color genetics
I am trying to find a model to link the phenotype eye color to its genotypes.
I know that there exists a simple model from Davenport, which explains {brown,blue} eyes. Further, there is an extended ...
0
votes
1answer
28 views
Is every cell competent?
I would like to know if every cell is competent or if there are any cells that are not competent.
2
votes
1answer
36 views
Animal UV vision
It is reasonably well known that many species, such as bees and some types of birds as examples can see into the ultraviolet (UV). How is the structure of their eye different to humans to allow this?
...
1
vote
0answers
34 views
Electron transport in granal stacks
See paper for distribution of PS-I and PS-II within grana
As explained in the above paper, the PS-I complex is primarily located within non-appressed thylakoid region and stroma lamella, while PS-II ...
4
votes
1answer
37 views
Photosynthesis regulation
I read about the regulation of Calvin cycle by thioredoxin which activates key enzymes essentially by converting disulphide linkages on inactive enzymes into sulfhydryls. Another regulatory mechanism ...
2
votes
1answer
50 views
What is the relationship between UV wavelength and penetration depth into human skin?
Some background - Some recent research has strongly suggested that UVA penetration into the skin is far more dangerous than UVB, a very good example is this paper by Agar et al. (2004).
My query is, ...
2
votes
2answers
72 views
E. coli, risk of infection?
There has been a warning about E. coli contaminated water in South Florida. Now I'm wondering are there empirical data or historic cases which show a correlation between E.coli levels in tap water and ...
1
vote
1answer
28 views
Deep diving in mammals
Mammals like seals often dive and can remain under water for more than 70 minutes.
How do seals know when is it the time to come up?
0
votes
0answers
40 views
Understanding SIR models in epidemiology
We are doing research on a SIR model of an epidemic. For one of the subsections, we are talking about saturation content rate of a human. We would like to know if anyone has an understanding of ...
1
vote
1answer
20 views
Can the excessive consumption of mineral water lead to kidney stones or other health issues?
I heard that drinking too much mineral (bottled) water could lead to problems such as kidney stones because of the high amount of minerals in it. Is it true? If so, what is considered to be excessive?
...
1
vote
2answers
43 views
Which texts are good for beginners to understand evolution on the genetic scope?
Are there good texts to study the evolution, how it works, and how mutations and changes lead to evolution of the organism ?
And how does the information increase through the long time using ...
2
votes
1answer
72 views
How is consciousness linked to the brain?
Could the brain be working without consciousness? Does the brain interact with consciousness? Alternately, is it that consciousness can't really control the brain, and you only have the impression ...
1
vote
2answers
27 views
Are there beneficial genetic mutations identified by consumer DNA genotyping?
I'm looking at services like 23andme, and see that they identify a wide variety of genetic-based risks, like predisposition to diseases, hair loss, cancer, etc.
Are there a more "positive" DNA ...
1
vote
1answer
40 views
How do viroids propagate to other hosts?
As viroids are simply non-encapsidated non-coding RNA molecules, it is difficult to imagine a mechanism for their continual infection, other than horizontal transfer which doesn't seem to be the case. ...
1
vote
1answer
53 views
Breaking of fats
There is a question I encountered.
Why is fat harder to digest ?
A) It has ester bonds.
B) It is not easily soluble in water.
Which is the most appropriate answer?
5
votes
2answers
65 views
Why are males more likely than females to have autism spectrum disorder?
The male to female ratio in autism spectrum disorder is around 4:1. However it seems ASD is not a simple X-linked disorder.
Then how is it possible males are more susceptible than females, if the ...
1
vote
1answer
26 views
What is a good Microbiology atlas for Bacteriology as online version?
I am looking for a online atlas for Bacteriology, the cost does not matter.
I have been searching SpringerLink, and Amazon but no good online version found.
What is a good atlas for Bacteriology as a ...
0
votes
1answer
39 views
Sewall Wright for dunces
[This is one more post in my growing "X for dummies/idiots/morons/etc." series.]
I've been enjoying Provine's The origins of theoretical population genetics for the last couple of days, but I must ...
1
vote
3answers
103 views
1
vote
0answers
34 views
Low RNA yield, low 260/230 ratio
I extracted total RNA from animal tissue using the Qiagen RNeasy kit, however my RNA yield was extremely low and the 260/230 ratio was around 0.3. This is the protocol I followed:
The animal ...
0
votes
0answers
31 views
Polymorphism in cnidarians?
The phenomenon of polymorphism in cnidarians is a particularly a troubling one, at least to me. I gather that it essentially refers to existence of various different forms or rather kinds of ...
2
votes
2answers
44 views
Transcription factor binding site located in intron
I have noticed that some TF binding sites are located in the introns of the genes.
I am puzzled about whether the TF only binds to DNA in the initiation stage of transcription and will detach during ...
-1
votes
0answers
24 views
Site related to forest research [closed]
Does anyone know any website(like- elance, odesk for IT) for forest research related outsourcing/job?
0
votes
0answers
44 views
Structure of adenoids
I am not sure this question belongs in biology, but I can't find a more suitable stack exchange site, feel free to delete it if this doesn't fit here.
Also, this question is going to be slightly ...
1
vote
0answers
17 views
Is there a biological process which causes organs to atrophy in response to enivronmental stressors?
I am aware of what happens when the body experiences starvation and breaksdown the muscles in the body for protein sources and the other processes that happen in such a scenario.
However, i wondered ...
