0
votes
0answers
22 views

Insect behavior - why do they land on my window and refuse to move [on hold]

Why do so many insects, particularly bees, land on my window screen and refuse to move even if I hit the window or the screen to make it go away. They do this to my car window too. I see no reason for ...
0
votes
0answers
14 views

Why can dogs not have a pink(ish) coat color?

In yellow dogs, there is a mutation in the MC1R gene which leads to a nonfunctional receptor. This leads to the production of pheomelanin which is pink/red (depending on concentration) instead of ...
-1
votes
0answers
9 views

What's the difference between “mixing” and “combination” of chromosomes? [on hold]

What's the difference between "mixing of chromosomes" and "combination of chromosomes" ?
1
vote
1answer
25 views

Ways to monitor enzyme kinetics with very fast time resolution?

I'm interested in any way to do time-resolved study of enzyme kinetics. I am studying some physical variables that may affect kinetics, but I want to study how quickly they take effect, and how long ...
21
votes
1answer
3k views

Why do mints make your mouth feel cold?

Why do mints make your mouth feel cold? And specifically, why does your mouth feel so cold if you eat a few mints and then drink a glass of cold water afterwards?
4
votes
2answers
69 views

Do any terrestrial herbivores use auditory crypsis for predator avoidance? [closed]

Some terrestrial predators "stalk" their prey: they sneak up on it slowly, maintaining a low profile, while keeping as close to silent as possible. This makes sense from an evolutionary perspective: ...
17
votes
4answers
2k views

Book recommendation on population/evolutionary genetics?

I have recently been involved in collaborations that require me to model the population genetics of eukaryotic populations. I fear I may either be "re-inventing the wheel" or making conceptual ...
0
votes
0answers
12 views

Is there any technique other than restriction enzymes to introduce staggered cuts into DNA?

I'm curious about introducing staggered cuts into DNA, but wonder if there is a way to do this in vivo in E. coli, as I heard introducing restriction enzymes on a plasmid would end up just shredding ...
7
votes
4answers
13k views

Why do men have a higher hematocrit (red blood cell count) than women?

The hematocrit, also known as packed cell volume (PCV) or erythrocyte volume fraction (EVF), is the volume percentage (%) of red blood cells in blood. It is normally 45% for men and 40% for women. so,...
4
votes
1answer
42 views

Cancer biology: Can tumors form from cells that are genetically identical to non-cancerous cells?

Can a tumor begin to form without any genetic mutations? I'm specifically interested in a tumor which could later lead to cancer.
0
votes
0answers
19 views

Is there good evidence to justify drinking vitamin supplements for health benefits? [closed]

I stumbled upon this question when trying to decide if I should keep drinking fish oil pills. Technical papers in biology are outside my scope, though, and I don't trust mainstream online articles ...
-1
votes
0answers
23 views

When frozen rain moves up and down within an anvil cloud, _____ is formed [closed]

When frozen rain moves up and down within an anvil cloud, _____ is formed. A. hail B. snow C. thunder D. lightning
1
vote
2answers
108 views

Why aren't there any transitional animals today?

You have probably heard this question before and in different formats. Usually, it is used as a "proof" to disprove the theory of evolution. I understand that the apes we descended from are not the ...
2
votes
1answer
34 views

Why do blue jays eat my cat food?

We buy some run of the mill big-box store cat food. Over the last several weeks, I've observed a blue jay landing on the cat food dish, taking a piece or two, and flying off with it. I assumed it was ...
3
votes
2answers
113 views

How do small birds survive the winter?

I live in a region with cold winters (ca. -40 C) and many quite small birds (sparrows, crows, ducks) stay for the winter. How can the birds survive this? As I understand it, smaller bodies will be ...
1
vote
1answer
49 views

Is QIAPI 1 a scam?

I find it strange that there isn't a wikipedia article on a drug that allegedly modulates human photosynthesis. I thought I might get a virus from some of the sites selling it, but others seemed ...
-3
votes
0answers
37 views

Is it possible to create the “perfect plant” at home? [closed]

I am starting a hydroponics farm/garden and I am interested in creating something like the perfect lettuce. I want attributes like crunch factor and shelf life. Is this a possibility that I could do ...
-2
votes
0answers
22 views

How much level should I overexpress a protein without any diseases as references [closed]

I am planning to overexpress this G protein alpha subunit by using adenovirus in HUVECs. Problem is, currently, no report showed that this protein expression is increased in any diseases. The only ...
1
vote
0answers
16 views

How do you technically perform the Ames test?

Is it necessary to take into account the volume of gm-agar(bottom) in the concentration determination, or is that determined only by the concentration in the top agar? I found several articles that ...
1
vote
1answer
48 views

Correlation of non-coding DNA with coding DNA

I sequenced the first exon of the MC1R gene of 15 labradors (genomic DNA) to look for the loss-of-function mutation (C.916C>T) and as expected, it was where it should have been (916th base pair). As i ...
1
vote
1answer
25 views

Can restriction sites be used as PCR primers?

I have a DNA fragment that contains the gene of interest sandwiched by restriction enzyme sites. Then, can PCR amplify the entire fragment, recognizing the restriction enzyme sites?
1
vote
1answer
67 views

Taste of salt water

I had a question relating to chemistry and biology, so please tell me if this is suited better for the Chemistry website. My question was, if water dissolves salt by separating the two ions, the Na+ ...
4
votes
1answer
41 views

Constantly wiggling moth pupa - will it emerge soon?

Today I found a moth pupa in the soil in my garden in western Sweden. It's about 15 mm long. I have found similar ones before, but this one is wiggling a lot more, even after I put it down and put a ...
3
votes
2answers
64 views

Computing Percent Identity between DNA / Amino Acid Sequence

What are some tools where I can input a pair of DNA sequences (or alternatively a pair of Amino Acid Sequences) and compute a percent similarity identity metric between them? Is BLAST the right ...
2
votes
1answer
125 views

How to interpret this cuffcompare result? Sensitivity over 100?

I run a cuffcompare: cuffcompare -r transcripts.gtf TransStandard_1.0.gtf I got the following result: ...
-1
votes
0answers
13 views

Question related to tropism [closed]

A potted plant was left hanging from a pole in an open garden such that the shoot was facing down and the roots facing up. It was watered regularly. State and explain which way the shoot and roots ...
5
votes
1answer
56 views

Why are so many recreational drugs serotonin 5-HT1A partial agonists?

I found out that many psychoactive drugs partially activate the 5HT1A receptor. Looking at Wikipedia, these include MDMA, LSD, CBD, Psliocybin/Psilocin, amphetamine and various other psychedelics, and ...
2
votes
1answer
28 views

“Other” peptides in IEDB

I used the immune epitope database (IEDB) to search for epitopes. I found some epitopes derived from antigens called " other" by IEDB. When I asked about it, the answer was "We use the "other" ...
1
vote
1answer
36 views

Book recommendation: Modern Synthetic theory

I'm a zoology minor. I wish to study modern synthetic theory (evolution) is there a good book available online for reading? The book should cover a basic idea about what the elements of modern ...
1
vote
1answer
32 views

Amount of variation between a canonical gene sequence in various samples

Suppose there is a GeneBank DNA sequence listed that produces a specific enzyme in a specific species of plant. e.g. A terpene Synthase. Now if someone samples various trees of the same species would ...
-1
votes
0answers
16 views

How the Phereoeca uterella (casebearer) is formed? [on hold]

Does anyone know how the Phereoeca uterella known as the casebearer is formed or born?
20
votes
6answers
9k views

Why haven't prey evolved the ability to always outrun their predators?

I can understand why some prey can't outrun a recently evolved species. However, since cheetahs have existed for so long, why haven't its prey evolved to always outrun it, driving cheetahs to ...
1
vote
1answer
18 views

Why is the formation of an enzyme-substrate complex endergonic (induced fit model)?

In the section about the induced fit model for enzyme substrate binding, my MCAT textbook claims that "The substrate has induced a change in the shape of the enzyme. This interaction requires energy, ...
4
votes
1answer
62 views

Do ants use something similar to the honey bee “waggle dance” to instruct the rest of the colony where to find a food source?

In the 20 years since we built our home, we've just recently had our first ant infestation. I'm familiar with the fact that ants leave scent trails to find their way back and forth between the ...
0
votes
0answers
4 views

Why does fumonisin toxicosis cause leukoencephalomalacia in horses, but not other species?

Fumonisin B1, a toxin produced by various Fusarium mould species, is well established as the aetiology of equine leukoencephalomalacia. As a result the disease is also commonly known as "mouldy corn ...
2
votes
0answers
20 views

How does one apply Bayesian inference to quantify a read the deeper you sequence?

For NGS sequencing technology, the "deeper" you sequence given fragments, the more certain you are of what is being sequenced. This sounds like a simple application of Bayes's Rule. What is the ...
0
votes
1answer
46 views

Why People have skin color between fair and dark?

According to Mendel's laws traits do not show any blending. So according to his laws people only with fair or dark skin should exist. Do the alleles in this case blend? And why?
2
votes
1answer
82 views

Why is the manchineel tree so poisonous?

The machineel tree is incredibly toxic to humans. What advantage could Hippomane mancinella have for being so poisonous? It's name even apparently translates to “little apple that makes horses mad”. ...
0
votes
0answers
12 views

Datasets in Biodomain like Word similarity datasets used in word2vec and Glove [closed]

I am training word2vec on biomedical texts. In order to perform word similarity and word analogy tests I want to have pairs of biomedical terms having same relationships(could be any), just like we ...
0
votes
2answers
46 views

Comments on Experimental result regarding Anti-Bacterial soap

After using soaps, we rinse our hands with water. Do bacteria from the water attach themselves to our hands again? If we wipe our hands to cloth after washing our hands, do bacteria from the cloth ...
3
votes
2answers
48 views

Age-Dependent STD Infection

It seems that young females (comparing age 15 vs age 24) are 20x more likely to get chlamydia from a single unprotected sexual encounter with an infected male. What are the reasons for this? Are ...
3
votes
1answer
43 views

Why is statistical mechanics relevant to RNA and protein folding?

This is a very naive question. As far as I understand the folding of a molecule is governed by the electromagnetic forces between its atoms and also between its atoms and the atoms in the surrounding ...
0
votes
1answer
17 views

Why is nitrogen isotopic labelling required for protein NMR?

Why is labelling required for Nitrogen (by 15N) for studying structure of a protein using NMR?
1
vote
2answers
33 views

Do ants have a “stay away” signal?

Last night I discovered many ants entering my house through a window with an imperfect seal. I placed a poison ant bait on the window sill and within seconds they were feasting on it. This morning I ...
0
votes
0answers
25 views

How does stimulus reach neural threshold?

I understand that when the stimulus into a neuron is greater than the threshold it triggers the action potential. Do all the contributing stimulus have to occur at the same time, or can they occur ...
0
votes
2answers
50 views

How is UV light damaging DNA as the chromosomes are deep in the cell?

When UV light is on your skin it has to go through the cell membrane and to the membrane of the core. So it looks like that the DNA is protected. But it probably isn't. But can't membranes not been ...
-1
votes
0answers
14 views

Would there be any other possibly exceptional phenomenons happen in the study of ' Concordance of monozygotic and dizygotic twins for traits'?

I am a first learner in this realm and I could not really understand any other academic papers on the websites , which is complicated for me .So I not sure how to use them effectively to support my ...

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