4
votes
1answer
51 views

Spider Identification Illinois

I noticed a really huge, beautiful web on my porch last week, and tonight, I discovered its resident. I'm thinking it's a Araneus diadematus (Cross Orbweaver), but was hoping for some confirmation. ...
2
votes
0answers
14 views

How much does the nutritional value of insects depend on what they're fed? [closed]

Insects are often touted as being the food of the future due to their nutritional value and small amount of resources required to raise them. However, how dependent is the nutritional value of an ...
2
votes
0answers
23 views

Unsure why Synechococcus moves at angle in cuvette

I'd really appreciate your help. I'm working with Synechococcus. In my experiment, I have Synechococcus in a solution of milli-Q water. I illuminated it with a focused white light through a pinhole ...
2
votes
0answers
57 views

Do mutations come in pairs? [closed]

As DNA is organized in a double-helix, a change in one strand must be accompanied by a corresponding change in the other strand. Let's say an original sequence CATCAT mutates into CATGAT. The other ...
1
vote
1answer
22 views

How is Glycophorin A and straphylococcal related to Escherichia coli and what does readily purified mean in this context?

I am reviewing the paper "Glycophorin A Dimerization Is Driven by Specific Interactions between Transmembrane Alpha-Helices." There is a statement in the abstract which I don't understand: "The ...
1
vote
1answer
56 views

How did people's liking of ceremonies evolve? [closed]

Habitual group activities are prevalent across many animal species, particularly in mammals, especially in primates. However, I do not see any evolutionary benefit of this. 'Ceremonies' take time, ...
0
votes
1answer
50 views

Cut strand of hair longevity?

Quick and useless question : what can be the longevity of a cut strand of hair, assuming we kept it in (good) normal conditions ? Any idea ?
2
votes
0answers
25 views

How does drug-induced photosensitivity work?

Some drugs (tetracyclines, for instance) can cause photosensitivity reactions—that is, some patients become extremely sensitive to the sun, developing rashes or inflammation after spending time ...
1
vote
1answer
30 views

Does alcohol really do more damage to the body of a child compared to an adult?

Beside the fact that children and teens (people under the age of 18 year) usually have less body weight than the average adult, is there a biologically fundamental difference between the damage done ...
0
votes
0answers
12 views

Best articles on Rad51/Rad52

What are the best journal articles to read on Rad51/Rad52 in the context of homologous recombination and cancer?
1
vote
0answers
8 views

Interaction study of oligomeric proteins

I'm dealing with two different protein(say, protein_a and protein_b) which stays in an interacting-oligomeric form in biological system. I have so far successfully been able to purify both the ...
1
vote
1answer
54 views

When does DIFFUSION occur and not OSMOSIS, and the otherwise?

For example, I do know that red blood cells have both the Na+/Cl- co-transporter and Aquaporin (water channel) that allows both Na/Cl and water molecules to pass through. But why in biology textbooks ...
0
votes
0answers
23 views

Difference between Category, Rank and Taxon

Is there any differences between the terms Category, Rank and Taxon or they all are same? I remember an explanation which goes on like this: Category and Rank are the same and are the categories of ...
3
votes
0answers
24 views

Cause-and-effect questions about growth and development of plant

I need to solve some cause-and-effect problems. The problems are related to growth and development of plant. "Growth and Development" chapter is the first chapter in third level of high school (senior ...
1
vote
0answers
16 views

What happened to my immune system? [closed]

when I was a child I had frequent asthma attacks, skin rashes from touching pretty much anything and my joitns were swelling, also my eyes would get inflammation all the time. It has since subsided ...
1
vote
1answer
10 views

Is the PCT of the nephrons of the kidneys of marine vertebrates to minimize the natural tendency for exosmosis?

For marine vertebrates, the concentration of salts outside their body (in the water, that is) is more than that inside their body. So, there is a natural tendency for exosmosis to occur. To minimise ...
0
votes
0answers
32 views

How to get Population Genotype Frequency from 1000 genomes Perl API

Posted a similar question on Biostars but got no response. Not sure if I'm allowed to link to it? Basically I want to pull genotype frequency data for a population group (such as CEU) instead of ...
0
votes
0answers
13 views

Why do we itch? [duplicate]

Here I have a simple question why do we itch? Is it because of some alteration of the skin or just a reflex action by the CNS? I am asking for a reasoned scientific answer to this.
4
votes
2answers
45 views

Is the sun's damage to skin sufficient to warrant protection anytime the average person goes outside or just for extended periods?

According to the American Academy of Dermatology website, Everyone needs sunscreen Sunscreen should be used every day if you will be outside. The sun emits harmful ultraviolet (UV) rays year round. ...
1
vote
0answers
14 views

Cis-AB phenotype verification

I know that my blood type is AB. I wanted to know if I am cis-AB since cis-AB seems to have a different approach in blood transfusion. Is there a lab test that can verify is a person is under cis-AB ...
3
votes
1answer
32 views

Are genes uniformly dispersed throughout the genome?

I think that telomeres and centromeres are regions with a very low gene content (= regions that contain few genes). To the exception of telomeres and centromeres, are genes uniformly distributed ...
0
votes
1answer
39 views

Is there a correlation between mutation rate and recombination rate?

I have in mind that homologous recombination (HR) can cause mutations (indels and substitutions). I am wondering if this is true and if it is, then I am wondering whether this effect is really ...
26
votes
1answer
4k views

Why is the brain white?

I have read many articles about how the brain is the most power-hungry organ in any living complex organism, requiring about 70% of it's oxygen supplies in the resting state. Since the usual medium ...
3
votes
1answer
25 views

Fruit Fly Hybrids

I have a food waste bin in which I put fruit scraps. The fruits come from all over the world, mainly Europe though. I'm in the UK. I assume the fruit Fly eggs are already in the fruit, in which ...
0
votes
1answer
17 views

Frequently Mutated Gene Definition

I have a question regarding defining frequently mutated genes which I was hoping someone could answer. Basically I have a list of 40 cell lines and 100 genes, and for each gene a cell line is ...
2
votes
1answer
36 views

Why would mutation rates increase in a tumour?

This article describes a tumour: Swanton found that even the primary tumour was surprisingly varied. He found 128 mutations among the various samples, but only a third of these were common to all ...
1
vote
1answer
16 views

does phagocytosis dependent on opsonization?

does phagocytotic activity of macrophages and neutrophils depends on opsonization by IGg (antibody) and C3 complex,if it does, so then why macrophages and neutrophils are categorized in Innate immune ...
2
votes
1answer
66 views

Ways to fight black mold

Is it possible to introduce a microorganism to a colony of black mold that will kill off the black mold entirely and permanently? Is there a common microorganism that likes to eat them and is harmless ...
3
votes
1answer
84 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
102 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
51 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
43 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
50 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
78 views

Cause of hexadactylisim in Amish people

Is it caused by inbreeding of many generations within an isolated population?
8
votes
1answer
66 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
31 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
43 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
42 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
35 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
38 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
62 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
28 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.

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