0
votes
0answers
34 views

Saline solution for animals

A popular "well-known fact" is that all creatures on Earth consist mostly of water (i.e. H2O). Indeed, a liquid called "normal saline solution" is just a solution of 0.9% sodium chloride in distilled ...
0
votes
1answer
23 views

How does the MET gene work and what happens when the promoter region gets mutated?

I am doing research on inherited risk of Autism Spectrum Disorders(ASD) due to common Copy Number Variants(CNVs) One of the mutations is the 'CC' variant of Rs1858830 in the promoter region of the MET ...
2
votes
2answers
32 views

Osmotic Pressure and Enzyme Activity

Is it true that in an enzyme-catalyzed reaction, the rate of reaction does not vary with varying osmotic pressure? Instead of just a true or false answer, why does it, or why does it not vary with ...
14
votes
2answers
717 views

Why does mouldy food make you sick?

Bread gets mouldy pretty quickly, and my parents (both of whom are nurses) throw out a loaf of bread after a spot of mould is seen (because "if you can see one spot, it means the whole thing is ...
4
votes
1answer
47 views

How does botulinum toxin enter the blood stream from the digestive tract?

To my understanding, large polypeptides such as botulinum toxin cannot pass the intestinal lining intact. How, then, can it enter the bloodstream and cause botulism poisoning?
3
votes
0answers
26 views

How long does it take unused antibodies to clear the system?

Say you have the flu and a normal immune system. Now you're all better but your antibody level is still elevated. How long does it take for those antibody levels to go back to a base value?
2
votes
1answer
66 views

Why does T-cell Cancer Therapy require a large tumor mutanome?

An article I read about Neuroblastoma states that the fact that Neuroblstoma has a small mutanome means that it is not viable to apply the classic T-cell immunotherapy. Why is this so? The article can ...
5
votes
1answer
21 views

How to calculate the percentage of heterozygous cells based on a gene map

I've encountered the following question and am quite stumped by it. A female with genotype AABBCC has been hybridized with a male that has the genotype aabbcc. The first generation (F1) has been ...
4
votes
1answer
38 views

Why lab technicians use indirect (antibody reaction) method for diagnosing?

In microbiology we have two types of microbial diagnosis. The direct method is where we detect the invader's DNA, Antigens or culture to see the exact pathogen while the second, indirect, method is ...
0
votes
1answer
25 views

Presence of reaction module in bacteria but not in Eukaryotas (human)

From the statistics page, I found that the Module-M00008 is present only in bacteria and not Eukaryotes. Why so? I noticed that all the compounds necessary or the reaction are present in human body ...
2
votes
1answer
33 views

Why is there a compound highlighted in red in a KEGG Module search?

Considering the following module: http://www.kegg.jp/kegg-bin/show_module?M00115+C00003 why is the compound C00003 marked in red?
-3
votes
1answer
77 views

If I buy a banana at the market, is there any chance that an insect is hiding inside it? [closed]

I watched this horrifying video on Youtube. It shows movement beneath the skin of a banana and then a spider pushes it's way out. Suffice to say I'm too scared to eat bananas anymore! I would like ...
1
vote
0answers
106 views

Which of these methods is both effective and reliable in elongate muscle and tendon for use in humans: growth factors or stem cell technology

Which method is it the most effective, but also the most reliable for elongating muscle and tendons for clinical trial; using modern growth factor technology or using modern stem cell technology? ...
5
votes
1answer
61 views

Is transplantation of neurons between species possible?

Can brain tissue from one species be implanted into the brain of another species? Because the brain is tolerant to the introduction of antigens (it is said to be immuno-privileged), I was wondering ...
6
votes
1answer
71 views

Why do skinny people live for shorter than the norm even though calorie restriction extends life expectancy?

If I understand correctly, calorie restriction may extend life expectancy slightly (not proven exactly how much for human). But according to the statistics, skinny healthy people have even shorter ...
-1
votes
0answers
34 views

Heart Rate while Eating?

I was wondering does heart rate increase during the consumption of food (chewing, starting the digestive system)?
1
vote
1answer
38 views

shRNA knockdown not showing with Western

I've recently been performing shRNA transfections and was hoping to get some advice on why I'm not seeing any knockdown via western blot I transfected by MDAMB468 breast cancer cell lines with shRNA ...
18
votes
2answers
2k views

Could viruses be used as antibiotics?

Could we use viruses that only affect bacteria to act as antibiotics? The more bacteria, the more times the virus divides, so the stronger it gets. Is this practical?
2
votes
0answers
24 views

How large might a paper wasp nest become?

About two weeks ago I noticed a new wasp nest in my back yard. I generally leave them as long as they aren't interfering with anything, but this nest has suddenly grown quite large and they are ...
1
vote
1answer
13 views

What information does the KEGG Module statistics page show?

While browsing through the home page of KEGG Module, I clicked the button named Module statistics. Can someone tell me what does these numbers signify? What are they the statistics of?
1
vote
1answer
31 views

Can roots have cuticle, especially aerial roots?

In my school biology book, it is written that cuticle covers the epidermal cells in aerial parts of plants and root epidermis doesn't have cuticle. My question is that whether aerial roots, in plants ...
1
vote
2answers
41 views

Difference between modules in KEGG Module

The KEGG module M00115 includes a set of reactions while M00542 does not have any; it just shows the list of enzymes. Is the reaction set for M00542 still unknown?
3
votes
2answers
32 views

Cell line immortalisation biosafety

Cell lines are often immortalised by artificial expression of proteins which specifically cause the knockout of important cancer suppression genes or the activation of proto-oncogenes. Cellular ...
4
votes
1answer
79 views

Do deaf people sleep better?

Since deaf people can't hear, is relaxing and falling asleep easier for them? In general, do they sleep better than hearing people? Of course some hearing people have no trouble getting to sleep, but ...
2
votes
1answer
32 views

Change Genbank entry date with Biopython

I can create a new Genbank record in Biopython with the following code: ...
1
vote
1answer
16 views

Generate full dimer from monomer with C2 symmetry?

I downloaded a PDB file of a dimer, but it only contains the monomer, and it says that the dimer can be obtained from C2 symmetry. For an example see here: ...
0
votes
0answers
25 views

What chemical produces the classic “roach spray” smell?

A long time ago (early '80s), in a galaxy far, far away (MIT), I lived in a dorm with a roach problem. The facilities people kept the roaches in check with a specific insecticide that had a very ...
5
votes
1answer
239 views

Why did Opabinia have 5 eyes?

I recently read about a fossil called Opabinia. What intrigues me is that it had five eyes. I was under the impression that most features, such as eyes, ears and legs are always even-numbered, i.e., ...
3
votes
0answers
21 views

How do paper wasp larvae not fall from their nest?

There is now a paper wasp nest hanging from the eaves of my bedroom. Not very big, I supposed about a hundred chambers and about 7 to 10 adults in total. I observe it every now and then. It just ...
3
votes
1answer
31 views

Who compared developmental biology to crystallography?

I need to find out the name of a nineteenth century biologist who compared developmental biology to crystallography. His idea was that crystals are formed from 'cells' (defined molecular units) that ...
-4
votes
2answers
40 views

Why does a gene have two alleles? [closed]

Why does a gene have two alleles? When there is a gene for producing the color pigment for a flower, why are there there two alleles, producing either same color or different color (homozygous and ...
-4
votes
1answer
35 views
0
votes
1answer
36 views

Would a human survive eating only living ants?

After reading an admittedly foolish question about 1 googol ants vs. 1000 humans, I had a question. Could a human survive solely on eating ants (common ants, not the stinging kind, or leafcutters ...
1
vote
0answers
13 views

Why can't diamine oxidase be supplemented?

I've read that diamine oxidase cannot be supplemented from an academic article but it had no explanation as for why. I am curious as to why this? Article reference: ...
2
votes
2answers
58 views

Does “squinting” make you concentrate better on a logic test?

We have all had those moments of intense concentration on some tough exam, perhaps a college test or whatever... Why is it that when we squint, it feels like we can focus and concentrate better on ...
3
votes
2answers
33 views

Would a person live longer, if such a person lived in a planet with lower gravity? (say, Mars) [closed]

I was wondering: some companies plan to colonize Mars, many of us know. But if one were to live on Mars, would this person live longer? It seems to me that a lower gravity would mean less overall ...
1
vote
1answer
44 views

Can we change the direction of a neurological signal? [closed]

My question is can we change the direction of a neurological signal? When a neurological signal is generated it goes to the brain. Along the way it passes synapses. Can we make it change it's pathway ...
1
vote
1answer
35 views

Are these termites?

These are outside a window in Phoenix, Arizona. I looked on the internet for pictures and these guys looked very similar to winged termites.
3
votes
1answer
40 views

Are there journals for theoretical models of protein-protein interactions?

Are there respectable scientific journals for publishing models of protein-protein interactions obtained by docking simulations? I would also discuss the biological significance of the particular mode ...
2
votes
2answers
31 views

How do t-lymphocytes become mature if thymus has lost its function?

The development of t-lymphocytes are done by thymus and we also know that the thymus degenerates before puberty and we also know the maximum lifespan of WBC's is 15 days. So, how do t-lymphocytes ...
1
vote
0answers
21 views

Does anyone know what type of Cocoon is this?

I am really concerned with this since I've never seen a cocoon this color before and can't find it anywhere on the internet. I found it just laying on the ground not attached to anything, but it ...
0
votes
0answers
18 views

Identifying Bacteria

I have a symbiotic colony of bacteria and yeast (SCOBY) that I'm trying to identify. How would I go about determining what the bacteria is? I can do spectophotometry, thermocycling, gel ...
-1
votes
1answer
47 views

What are 'factors' in biology? [closed]

My question is what does the word 'factor' mean in words like transcription-factor or nerve growth-factor? What is similar between these different compounds such that they deserve the word 'factor' in ...
2
votes
0answers
24 views

Why does bacillus thuringiensis produce bt toxin?

Background : B.thuringiensis produces an inactive crystalline toxin during sporulation which when ingested by an insect, gets activated and causes pore formation in gut , subsequently leading to death ...
2
votes
1answer
30 views

Why are our bodies created to itch when histamine is released by our immune systems?

Why do bug bites and cuts itch when scratching them clearly doesn't help us survive? Did our early ancestors need to rely on this itching sensation, or is it just that the receptors for itches just ...
3
votes
1answer
50 views

Color vision across species

Is it true that color vision is sex-linked for all species with binary sexes? Is there an evolutionary significance to the fact that color vision is X-linked in humans? E.g., only female humans can be ...
1
vote
0answers
20 views

An obscure reference to a “golden vein” [migrated]

In some Yiddish literature there is reference to a 'golden vein' which seems to refer to Hemorrhoids. Is there any reason that hemorrhoids would be described as golden? Edit: In response to the ...
-1
votes
0answers
60 views

How to eliminate prairie dog colonies from a field? [duplicate]

I have several fields infested by gunnison prairie dogs. These things cause damage to the fields, irrigation system, livestock, and spread disease. For years, I've invited neighbors/friends to come ...
2
votes
1answer
29 views

Can anyone Id this flower?

Small pink flower, started out as tiny buds, leaves look almost like Maple leaves..
1
vote
0answers
10 views

Isotretinoin and retinoid receptors in brain confusion?

I am considering starting a treatment with Accutane(Isotretinoin), however I am not sure about what the effects on the brain are. Here are two studies that contradict each other: ...

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