0
votes
0answers
5 views

How do pacemaker cells evolve in the cell aggregation process of Dictyostelium discoideum?

Under certain condition like starvation period in the life cycle of a Dictyostelium discoideum community, they evolve itself into a multicellular organism in a process of cellular aggregation. I have ...
-1
votes
0answers
12 views

Is it theoretically possible to be immortal? [on hold]

I have little idea about gene sequence reading and missing of a particular code in every reading. Is that main key of aging? I mean is telomere partly responsible for this? How can we stop aging?
2
votes
1answer
8 views

How is it determined in a zygote state of foetus, that which side is mouth and which side is for anus?

After the fertilization when the zygote is in the growing state to a foetus, the main canal is introduced first, from mouth to anus. But my question is when the canal is created first how does it ...
1
vote
0answers
14 views

Why do I smell chlorine when my sinuses are clogged?

I constantly smell chlorine after blowing my nose. I know it has to do with the sodium-chlorine ion channels but I don't know exactly what role they play. Related: I know in the disease "cystic ...
1
vote
1answer
11 views

Why Sister Chromatids and Daughter cells and not brother chromatids and son cells

In biology why do we have terminologies in terms of female relatinships such as daughter cells and sister chromatids and not in terms of male relationships. When did this custom started and is there a ...
1
vote
1answer
20 views

Why does lack of sleep make my balance worse?

For years, I've noticed that the day after a night of poor sleep (4 hours or less), my balance noticeably degrades. For instance, while walking 20 feet to the coffee maker, I might stumble into the ...
1
vote
0answers
15 views

What effects would be caused by exposure to common life forms with opposite entianomer biology?

Pretend a human had their body "reflected": heart on the wrong side, etc.; but also at the biochemical level: proteins, sugars, cells, DNA, everything. What would the effects be of that human's ...
1
vote
0answers
5 views

what is the mechanism of pollen tube germination when he is on the Stygmate ?

what is the mechanism of pollen tube germination when he is on the Stygmate ? is it because of chemotaxis ? chemical substance? we learned that on a Stygmate of a flower, you can find pollen of ...
1
vote
1answer
3 views

Do I have to use sucrose to induce a lac promotor?

I'd like to optimize the expression of a fab fragment in Escherichia coli. For induction of the lac promotor on the pAK400 vector I use IPTG and sucrose. Do I optimize the expression in case I would ...
1
vote
1answer
14 views

What is self-immunoreactivity?

I read something like "some tested variants show self-immunoreactivity". So, what exacly is self-immunoreactivity? Is it something like antibodies induced by a specific variant showing ...
3
votes
2answers
32 views

Why “broad” instead of “large” cross-immunoreactivity? [on hold]

From the articles I read, expressions like "broad cross-immunoreactivity" pops up a lot. So, I was wondering, why "broad" is used here instead of large? Is there a specific reason?
2
votes
0answers
17 views

Zoology - Help identify the kind of spider

Yesterday, I bought a banana tree (Musa Basjoo) from a local supermarket. Today, I noticed a hive of small spiders on the tree. I do not know where they came from, so I am curious to identify these ...
1
vote
1answer
19 views

Can the Hebbian theory apply to Inhibitory Neurons

If I understand the basic Hebbian theory, when a neuron fires a pulse to another neuron and this pulse causes the target neuron to fire then the delta energy sent from the initial neuron to the target ...
1
vote
0answers
26 views

Do DNA supply houses maintain a watch list for dangerous oligos (Anthrax, Smallpox, etc.)?

The recent work by DeLoache, et al. on a synthetic opiate-precursor production pathway in yeast has generated a lot of scare stories in the media about people homebrewing heroin as easily as they ...
-3
votes
0answers
28 views

Epicanthic fold (eye)

What evolutionary advantage does the epicanthic (eye) fold provide? I know that the incidence of epicanthic folds is high in Central, East, and South East Asian populations, Mongolians, Inuit, etc. ...
0
votes
0answers
32 views

Recommend any Molecular lab LIMS (Laboratory Information Management System)

We are looking to develop or customize a LIMS for our molecular lab. Do you know of a LIMS that you've used in a molecular lab before, or one that could be used. Thanks for the help (Edit) Some of ...
6
votes
1answer
88 views

What is peptide mapping?

After searching online for peptide mapping to my understanding it can be treated as the fingerprint of the protein. It is obtained at the end of several chemical processes and it helps to understand ...
-2
votes
2answers
59 views

What is the difference between electrons and energy? [on hold]

I'm studying microbiology right now and I have come across something confusing to me. I thought electrons provided energy to the cell by being incorporated into reducing powers and eventually driving ...
2
votes
2answers
2k views

What is the contribution of the cockroach to the ecological environment?

I've read a lot about cockroaches but was unable to find how they contribute to the ecological environment. Does anyone know?
0
votes
2answers
76 views

Why are bacteria immune to snake poisons?

In a test I was asked why bacteria are insensitive to snake toxins. Is it their membrane that provides a barrier to the toxins? Or do snake poisons have specific targets and thus cannot bind to ...
3
votes
1answer
28 views

Terminology regarding cross-immunoreactivity

After reading an article, I saw expressions like "cross-immunoreactivity among epitopes", "cross-immunoreactivity among variants of virus", "immunological reactions among pairs of peptides" and so on. ...
-1
votes
0answers
58 views

Specific genetic code sequence [on hold]

Wikipedia gives the following example of genetic code (this one from mRNA): AUG ACG GAG CUU CGG AGC UAG This sequence appears to be part of a much longer ...
4
votes
0answers
18 views

Recent classification for parasitoid (ecological relationships)

I'm about to present an exam about ecological interactions in biological control. Although the position of some groups is clear, in the case of parasitoids they are included sometimes as predators, ...
2
votes
1answer
20 views

What is the distance between the sciatic nerve and the colon at the closest point?

Is it possible that a full colon impinges on the sciatic nerve? Is there anything that physically separates the sciatic nerve from the colon?
2
votes
1answer
33 views

Pavlovian Conditioning And Synesthesia

I have been reading about Pavlovian brain conditioning and it seems that documented cases are mostly limited to motor reflexes (like conditioning an eyelid to close when hearing a tone) or taste ...
8
votes
2answers
792 views

Are blood vessels organs?

Are blood vessels classified as organs? Organs compose of 2 or more tissues and perform a certain function. Blood vessels have 3 different tissues and perform a function (transport blood), yet I do ...
-4
votes
0answers
37 views

Can pandas hunt for meat?

Recently, I learned that pandas have a carnivore's digestive system but that it exists almost exclusively as a herbivore. If pandas hunted would they be able to find meat in their environment? Can't ...
4
votes
0answers
34 views

Does anxiety about weight or eating cause people to become overweight?

A while ago I saw this TED talk about the futility of dieting. The speaker suggests that a body maintains a homeostatic weight point and returns to that weight after dieting has stopped: Turns out ...
0
votes
1answer
50 views

What is the point at which abiogenesis is complete and evolution begins? [on hold]

Is the minimum criterion for life a single cell? It seems that self-replicating RNA is not enough, but I don't know. What would be the most basic cell that could fit this criterion and what cells ...
2
votes
0answers
40 views

Can DNA test of my grandparent's brother reveal my heritage from that branch of the family?

I'm thinking about doing that DNA test on all my grandparents to know where their genes come from. They are getting very old and I don't want to let the opportunity pass to gather more knowledge about ...
1
vote
1answer
35 views

Evolutionary advantages of wet nose of cats and dogs?

Everyone knows that some animals, at least cats and dogs, keep their noses wet and cool. But why did they evolve it? What evolutionary advantages does it provide? Smell-sensing cells need cooling for ...
-4
votes
0answers
19 views

pheromones and attraction [on hold]

The more different the pheromones of two people, the more attracted they will be towards each other and Pheromones are related to genes. According to this, two blood related people cannot be sexually ...
6
votes
1answer
38 views

What does the term “relay competent” mean?

I was reading the article of Dallon & Othmer (2010) which deals with cell aggregation in Dictyostelium discoideum. In the introduction of the paper it is said that cells becomes "relay competent". ...
-1
votes
0answers
27 views

Why would I not get a hangover anymore after losing weight? [on hold]

First off, I hope this question is not off-topic. It is related to a specific question I have about my own personal experience. However, it is absolutely not a question seeking medical advice. I ...
2
votes
0answers
34 views

Do High Iron Stores (but within the healthy range) Make Sun Exposure Damage Worse?

Ultraviolet damage from sun exposure is related to the creation of free radicals. Iron is often involved in exacerbating damage by free radicals. Having lower iron stores is associated with reduced ...
5
votes
2answers
38 views

If the haploid prothallium of a fern fertilizes itself into a diploid sporophyte, does this make all ferns clones?

From what I understand in the alternation of generations in ferns, mature spores germinate into a haploid prothallium. But how does this gametophyte produce recombinant gametes if it itself develops ...
3
votes
1answer
62 views

The dominance variance on a single locus

I was reading the book "Genetics and Analysis of Quantitative Traits", by Lynch and Walsh. I how the covariance between two individuals with IBD $\Theta$ gets divided into just the additive variance ...
0
votes
0answers
18 views

Control studies for vital signs [on hold]

This is related to my cyborg thought experiment(which is really an extension of my cell from scratch thought experiment). It is about determining heart rate, breathing rate, temperature, %O2, and ...
1
vote
0answers
14 views

Getting read size less then specified in parameter file Flux Simulation

I have tried to use flux simulation tool to generate simulated RNA-seq data. I gave the following parameter file to flux-simulation shell script ...
11
votes
1answer
103 views

Doing a medical study on yourself?

What research guidelines is a person legally mandated to follow if they want to do medical experimentation on themselves? There is a large amount of variation in the types of medical experiments so I ...
0
votes
1answer
29 views

Programmatic way to differentiate homodimers from heterodimers?

For pdb files is there a simple programmatic way to determine if the file is made up of homodimers or heterodimers. I have many files so an online tool or some ...
-3
votes
0answers
47 views

Coffee efficiency? [on hold]

I was thinking and I realize that people have a tolerance to caffeine right. So I stopped drinking coffee for a while and then when I started to drink again it got me all really hyped. So what I think ...
6
votes
1answer
48 views

Why aren't genetic triplets roughly evenly found in DNA?

Sorry, the page I linked to is huge and you'll need to do a text search for "CG" to find the part I'm talking about. I found a graph on this page (http://www.oftenpaper.net/sierpinski.htm) showing ...
2
votes
1answer
32 views

What are the mechanistics of stinging nettles?

There is a lot of research on why nettle extracts causes skin irritation and a stinging sensation. However, I cannot find information on how the extract is injected in human skin. Similarly, I haven't ...
6
votes
2answers
184 views

What is the difference between sequence, reads, and contigs of genetic material?

Can someone explain the differences between sequence, reads, and contigs of genetic material such as DNA, if possible with an example? I am new to bioinformatics, and I have not found any conclusive ...
6
votes
0answers
24 views

What is cross-immunoreactivity, and how does it impact vaccine development?

What I understand about cross-immunoreactivity is that the antibody induced by one specific antigen is also fairly effective against another antigen. How would this be used for vaccine development? ...
8
votes
1answer
102 views
+50

Solubility of DNA in water

This would seem to be an easy to answer question, but I was unable to find an answer (in g/L) for generic double-stranded DNA or plasmid neither on Google nor on BioNumbers. I would expect the ...
0
votes
0answers
14 views

Is PTB ECG Diagnostic Database AAMI standard?

The PTB database can be found here. There has been only one publication about the database in the recent 15 years which list challenges in the database. You can review the ECGs (electrocardiogram) ...
8
votes
2answers
61 views

How can we predict protein folding in silico?

Currently, there is a lot of research focused on solving the folding patterns of proteins using computers (Folding@Home, https://fold.it/portal/, etc.). The question that I have is: How do you know ...
3
votes
1answer
41 views

How did the endoplasmic reticulum come to be?

Organelles are sub-cellular compartments in cells. However prokaryotes don't use organelles to organise their intracellular space. Evolutionarily, there is evidence that mitochondria and ...

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