0
votes
1answer
29 views

Earliest and latest onset of Huntington's Disease(Chorea)?

Huntington's disease can hit at any age, although it tends to hit middleaged people most often. What is the youngest and oldest person that has exhibited Huntington's? Clarification: By oldest I mean ...
2
votes
1answer
43 views

What is happening physically when I get sleepy and when I wake up?

After a week of too little sleep, I slept about 12 hours last night to "catch up". It made me wonder: what is happening physically that signals that I'm done sleeping, or conversely, that I need to ...
2
votes
1answer
27 views

DNA methylation on the forward vs reverse strand?

I'm wondering if there are meant to be differences in DNA methylation between the forward and the reverse strand of the gene? I'm wondering because in primer design for bisulfite pyrosequencing one ...
1
vote
2answers
37 views

Why do physicians try to match HLA complexes for organ transplant?

My understanding of acute transplant rejection is that donor dendritic cells present donor antigens on MHC1 to host naive CD8+ T-cells resulting in an immune response against the graft. If you match ...
2
votes
1answer
32 views

Sequencing a specific region of a genome

First off, I'm new to bioinformatics and I am learning about DNA sequencing. Let's say that I knew that a specific region of a genome which contained information about a disease (whether it a person ...
1
vote
1answer
18 views

What are the reactions in the body that triggers dizziness after cigar(nicotine) smoking in non-smokers?

Suppose there is a person that has never used nicotine in any form in his/her life. Why does the person get dizzy after a few "shots" from a cigar(nicotine)? What's the difference between using other ...
6
votes
1answer
91 views

How fast can a human run?

I'm a runner (cross country) and I'm always amazed at how fast Olympic sprinters are. There's a lot of hype about those in the 100-meter dash being the fastest in the world, and we're constantly ...
0
votes
0answers
52 views

How can periodic asystole of heart cause cataplaxy with partial asystolic syncope? [on hold]

In brain, it can be called reflex asystolic syncope - symptom unconsciousness. In heart, there can be temperary asystole, still with consciousness. If these occur at the same time but with brain ...
-2
votes
1answer
88 views

Can Panic disorder induce Atrial Fibrillation and Temporary Cardiac Asystole?

This question is partly based on the article "Asystolic pauses in atrial fibrillation. Incidence, dependence on the underlying disease and significance for pacemaker therapy", where the exact ...
0
votes
1answer
20 views

What controls gut motility?

I have two different papers. One claims that gut motility is reduced by stimulation of the Opioid κ and δ receptors. The receptors are activated by Morphine and certain derivatives, specifically ...
0
votes
0answers
12 views

Gastroenteritis virus causing mutation of the Enterochromaffin cells

I am working on the solution to a worldwide problem: IBS or chronic diarrhea following a viral gastroenteritis infection. I think I have an answer. The only missing piece to the puzzle I found in a ...
0
votes
2answers
75 views

What is called the condition where no pacemaker cells are active in heart for short-time?

Assume that the heart is beating but no pacemaker cells is working for at least 15 seconds. This would be very long compensatory pause if extrasystole started it. There may be some low frequent ...
7
votes
2answers
50 views

How to find miRNA binding sites on a specific gene?

I am trying to find miRNAs that bind to the 3'UTR of a specific gene. What is the best way of doing that (that is, with a good scoring analysis that is most commonly used by researchers in this area)? ...
0
votes
1answer
14 views

Does re polarization of muscle fibers mean that the muscle bundle is relaxed?

If I flex my bicep and continue to contract it does it mean that the muscle cells are in depolarizing state and not re polarizing?
1
vote
1answer
33 views

Please help me to identify this red worm

I found bunch of red worms coming out of sink. It is rather unusual to find an overwhelmingly large number of worms. It doesn't seem like earthworm or horsehair worm. I don't know much about the ...
-1
votes
0answers
38 views

DNA and aminoacid sequence [closed]

5’ ATG TCA ACT CGG GCA ACA CAT TGT CTG TAT GAC GAA TAA TTA ACG 3’ TAC AGT TGA GCC CGT TGT GTA ACA GAC ATA CTG CTT ATT AAT TGC Q1: What will be the resulting ...
2
votes
1answer
27 views

Are added yogurt cultures harmful to the gut?

I have read somewhere that the live culture added to yogurt acting as "healthy" gut bacteria are actually synthetic and harmful. Any truth to this? If so, what are some alternatives to getting good ...
2
votes
2answers
42 views

How did aquatic dinosaurs go extinct?

Dominant theory is that 'normal' dinosaurs went extinct from ether super volcano or meteor impact or combination of both. However there were aquatic dinosaurs that are not present at this day. Was it ...
3
votes
1answer
20 views

How is Microenvironment strictly defined?

I started to think this definition of Wikipedia: Microenvironment (biology), a small or relatively small usually distinctly specialized and effectively isolated biophysical environment (as of ...
8
votes
1answer
61 views

Can a human cell live indefinetely in a controlled environment?

How long can a human cell live in a controlled environment, given all necessary nutrients, temperatures, mechanisms for waste removal, and other requirements are provided for? Put differently: Can a ...
0
votes
0answers
36 views

Installing MRBAYES [closed]

I'm trying to get MRBAYES 3.2 to work on my linux computer (CentOs 6.4). I'm following the directions to compile the program from source from CompileInstructions.txt. It tells me to do the ...
4
votes
1answer
32 views

Is viral protein expression important for peptide vaccine?

I would like to know if proteins expressed in higher quantities, such as DNA polymerase, would be better vaccine candidates for a T-cell based vaccine. Thanks, Bernardo
8
votes
2answers
74 views

Fate of erythrocytes after splenectomy

The spleen is considered a graveyard for red blood cells. So in case of Splenectomy (complete surgical removal of the spleen), what would be the fate of red blood cells? Would this cause Polycythemia? ...
0
votes
0answers
16 views

Can textiles with visible mold removed via vinegar and bleach still pose a health threat for babies? [closed]

Our pram caught some mold after we accidentally forgot it in the rain: Green-ish dots all over. I'm rather nervous about the health risks of mold (asthma etc.), so I tried to remove it as good as ...
9
votes
2answers
1k views

To what extent is Ebola airborne? (aerosols)

Recently, CIDRAP at the University of Minnesota announced that Ebola may be more transmissible through aerosols than previously thought. I lack the familiarity with the field to critically evaluate ...
4
votes
2answers
37 views

Does trypsin strip flask coating?

Mammalian cell/tissue cultures sometimes require flasks coated with proteins. My uneducated guess is that these proteins mimic the ECM, perhaps the basal lamina, so finicky contact-dependent cells can ...
0
votes
0answers
23 views

Too much light in electrophoretic gel photo

The electrophoretic gel's photo shows too much light. Is it because the sample is not loaded properly? I can't see any gel lanes in my PCR samples or in the marker itself when photographing them.
4
votes
1answer
63 views

Are all functions of a human cell known? [closed]

Please bear with me as I'm intruding into your world from a computer science background. In programming, once you have created a program, you know all functions of that program. Thus, 100% knowledge ...
1
vote
1answer
11 views

What enables azacitidine to incorporate into both DNA and RNA?

I did a mini-project on the drug azacitidine for my pharmacology class, and I learned that azacitidine has the ability to incorporate into both DNA and RNA. I think this is really unique because a ...
1
vote
0answers
36 views

What houseplant is this? [closed]

What houseplant is this on the photo? The plant is living in Russia. What conditions are the best for it? What is the best place in the room? How often should I water it?
3
votes
1answer
26 views

What does the root “phyllum” mean used botanical binomial nomenclature

I often encounter the root "phyllum" in bionomial names in botany, but I've had trouble finding an actual definition for this root in any Latin dictionary outside of its taxonomic meaning. From ...
2
votes
1answer
26 views

Concentration of caffeine in physiologically relevant setting

Caffeine is known to overcome G2/M (and possibly other types of) cell cycle arrest through its effects on DNA repair machinery and is used as a positive control in studies of cell cycle arrest. In ...
2
votes
1answer
59 views

Nature Scientific Reports vs. BMC Genomics

I do not know if this question to suitable here or not. I posted it as I think biologists can help me in this question. If not suitable here, then I am sorry for that. I have written paper which I ...
1
vote
2answers
59 views

What kind of technology is required for plant seed DNA printing? [closed]

I'm a programmer so I have little knowledge in the field of biology. However I have an interest in plants, GMOs and DNA (in terms of programming). So, I want to know what kind of technology is ...
0
votes
0answers
8 views

Do all species have asymmetric female meiosis?

In all the examples I can think of, (mostly vertebrate), female meiosis, or oogenesis, only haploid gamete is produced while the other cell divisions result in polar bodies. While male meiosis results ...
1
vote
0answers
45 views

Is the attached digital camera on the top have the same magnification than visible in eyepiece? [migrated]

There are some microscopes with digital camera system attached to the top. But does it include or bypass eyepiece magnification? E.g. 40x objective lens and 10x eyepiece making the total ...
2
votes
2answers
62 views

Book recommended for neurobiology

I am looking for a good explanatory book concerning Neurobiology. I am interested on how the brain works but prior to this I believe that I have to start learning things about the biology of neurons. ...
1
vote
1answer
28 views

How do ants transport water?

All living things need water to survive. Worker ants can drink directly from the source. But a queen ant would need help from the colony to get its daily supply of food and water. I have seen ants ...
0
votes
0answers
14 views

Physiology of benign eye twitching?

About four times in my life I have experienced the feeling of my eyelid fluttering for a few minutes by itself, and then it stops. I have talked to other people who have had the same experience so I ...
3
votes
0answers
22 views

More extreme phenotypes when parents are from diverged populations

In quantitative traits we have many loci affecting a trait. If we took a bunch of parents where all mothers and fathers were of a certain value at the upper end of a trait range, and then looked at ...
0
votes
0answers
29 views

Have I stopped growing?? [closed]

I'm 14yrs old, 95lbs, and 4.9ft tall. Everybody says that since both of my parents is short, that I've stopped growing. My mother is 5.2ft and My father is 5.8ft. Am I still growing?
0
votes
1answer
39 views

How non-invasive blood glucose concentration measurement work?

Diabetes patients need to conduct the “fingerstick” a few times a day. One of the mechanisms of "fingerstick" is to take small amount of blood sample and put it onto a test strip. The enzyme on the ...
1
vote
1answer
32 views

How non-invasive blood glucose concentration measurement work? [duplicate]

Diabetes patients need to conduct the “fingerstick” a few times a day. One of the mechanisms of "fingerstick" is to take small amount of blood sample and put it onto a test strip. The enzyme on the ...
0
votes
1answer
49 views

What causes a polypeptide to fold into an Alpha helix over a Beta pleated sheet

I know how they fold, but what causes some polypeptide chains to preferably fold into Alpha-helix rather than Beta-sheets (or vice-versa). What force makes it fold into one conformation over the ...
2
votes
2answers
42 views

Is the Hypothalamus part of the Central Nervous System or Endocrine System

Sorry for a certainly naive question. Some references (for example https://faculty.washington.edu/chudler/nsdivide.html) seem to to indicate that the hypothalamus is part of the Central Nervous ...
1
vote
0answers
15 views

Niche differentiation in birds of prey

I'm not much of an ornithologist but I know enough to distinguish most Central European birds of prey. To me it is amazing that there are so many species that seem to occupy the same niche. Especially ...
-2
votes
0answers
34 views

birth control pills and eugenics [closed]

The birth control pill is one of the many measures that have been developed to control population. It is arguable that many proponents of eugenics in the years before the pill (1960) would have ...
0
votes
0answers
39 views

Regrowing Limbs using MatriStem; Research and Applications

Apparently, there is a substance (powder) called MatriStem which can regrow your nose and the tips of your fingers should they ever become diseased or severed. See here for photos (a bit graphic) ...
1
vote
0answers
19 views

Using Canonical Correspondence Analysis on matrices with missing data

I have a matrix of sites where not all the environmental variables I want to assess were sampled. In other words, there are sites with the whole set of variables sampled, and there are other sites ...
3
votes
1answer
38 views

Found a larva in my broccoli, is it a Small White (Pieris rapae)?

Found this living larva in broccoli from a store. It was about 10 mm long. It was in july this year, and I don't remember the country of origin for the broccoli. A bit of googling makes me think it ...

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