11
votes
2answers
1k views

How does a woodpecker not give itself concussions?

How does a woodpecker go about smacking it's head into a tree without killing itself?
3
votes
1answer
101 views

Does tea have its effect if you have a sleep after drinking it?

If I drink tea, then go to sleep for a while, when I wake up, will the effect of tea still be on me (the refreshing effect)? Does it depend on the duration of sleep?
3
votes
1answer
277 views

Will ants arriving with travel luggage form a new colony?

I have found a few dozens of ants in my luggage after arriving back from holiday. Am I at the risk that they will form a colony in my home? Are those ants able to form colonies that are normally ...
3
votes
1answer
79 views

Text/resource with information on all skeletal muscles and their motor units

Something analogous to an encyclopedia on baseball players with a list of all thier stats would be ideal. I'm not looking for just generic muscle names, locations and illustrations. Good answers ...
2
votes
1answer
101 views

A question about IPTG induction

I have found the information: `In the absence of lactose, the lac repressor binds to the operator sequence on DNA and bends the DNA by 40 degrees. This blocks access of T7 RNA polymerase to the ...
1
vote
1answer
43 views

Neurology: spinal tract

I have had a few difficulties finding answers for the questions below. I have tried answering the first two myself; but, I am not sure they are correct or not. And I am not too sure about the third ...
3
votes
2answers
15k views

Why Do Healing Wounds Feel Warmer To The Touch?

I fell over on my bicycle trying to avoid running over a rattlesnake, and ended up badly skinning my knee. It immediately began to bleed, but soon clotted. It has been 2 days now and it has formed a ...
1
vote
1answer
175 views

The distance the electromagnetic field of the heart can be detected

A very smart friend of mine seems to get taken in by junk science. He started telling me last night that the electromagnetic field of the heart can be detected beyond 30 feet. What is the actual ...
4
votes
1answer
73 views

HSL Lightness vs Eye sensitivity

In a monochromatic spectrum, is the human eye equally able to distinguish between lighter colors just as it is in distinguishing between darker colors? I mean is there really a linear relationship ...
1
vote
2answers
127 views

Heterochromatin binding sites position information

I am working on a project and I'm trying to find data on the position of genes and heterochromatin binding sites such as HP1 in Drosophila melanogaster. Is this information available for the DGRP ...
3
votes
1answer
115 views

Other than Acetylcarnitine what other orally-bioavailable Acetyl donors exist to assist in the conversion of CoA to acetyl-CoA?

I asked a question on bio stackexchange a few days from which I was hoping to be able to arrive at an answer for this question myself but I have had no such luck so now I am going to just ask ...
2
votes
1answer
155 views

What Aquatic Mammal has no Tail?

Found in a waterway in Butte County, CA. First thought it was a beaver kit, but it has no tail. What aquatic mammal has no tail?
0
votes
3answers
101 views

can recessive alleles produce codominance?

Maybe I'm confused by the term "codominance", but I wondering if codominance only occurs with two dominant alleles. Can two recessive alleles produce codominance in an individual? Likewise, can two ...
3
votes
3answers
3k views

Is the human body composition real?

In Fullmetal Alchemist when Ed goes to disprove to Rose the Sun God's "miracle" to bring humans back to life by proving that science (in the form of Alchemy) can create people by saying Water (35 ...
0
votes
1answer
139 views

what is the biggest known functional distance between an enhancer and its target gene (TSS) in cis?

since the title seems self explanatory; It would be nice if anybody could provide a reference. I'm looking for a paper that I belive stated around 1.5 Mb but anything above will be cordialy welcomed. ...
2
votes
2answers
108 views

chimeric sequences [closed]

I understand that chimeric sequence identification is done in results of sequencing projects to remove them and improve the quality of the output. I am unsure as to how they show up during sequencing. ...
1
vote
1answer
270 views

Convert gene name to uniprot ID

i have a list of gene name in a file CHRNB2 EGR2 GCK KRT14 LMNA FGF3 TK2 ABCC8 How can I map them to uniprot ID ? P.S I tried Uniprot "ID mapping" ...
2
votes
1answer
163 views

Any difference between inverted microscope objective vs normal microscope objective?

I'm planning to build an inverted microscope and I am not sure if I can use a plane achromatic objective of a normal microscope for the inverted microscope as well. Are there any specific needs for ...
0
votes
2answers
68 views

is there a way to do batch download for all gene pathways?

I would like to download all the gene pathways and genes of each pathway. Preferably, gene length of each gene as well. It would be a lot more convenient if there is an R package.
3
votes
1answer
94 views

Why do hummingbirds build nests with live ferns instead of dead materials?

Hummingbirds prefer to build their nests with spore-bearing ferns, and mosses. This is helpful for the reproduction of the ferns, which are then better able to spread their seeds. But how is this ...
9
votes
1answer
218 views

How are new people created from the DNA of an aged person. i.e. Why are we young?

The question "why do we age" has been asked numerous times. But why are we young? The cells of the adult human being are an age (time>0), but how can old cells create new cells that are younger than ...
1
vote
1answer
114 views

Does a top heavy population grow, decline or stabilize?

Imagine a population that has a larger proportion of older individuals than younger ones, what could possible happen to it in the future? I am guessing that if the older individuals reproduce, the ...
1
vote
3answers
54 views

FRET only works for interactions between 1nm to 20nm.

FRET only works for interactions between 1nm to 20nm. How can you be sure that the interaction that you want to study isn't less than 1 nm/greater than 20nm apart?
6
votes
2answers
7k views

If I squash an insect and it produces red “juice”, does it always mean it is a blood-sucking type?

If I squash an insect and it produces red "juice", does it always mean it is a blood-sucking type of insect? Or do some insects have red "juice" themselves, so the color is red on its own and not ...
10
votes
4answers
2k views

Does pheomelanin have a useful biological function?

Melanin is a natural pigment that is categorized into two main forms, eumelanin and pheomelanin. It's well documented in the science literature that increased eumelanin levels reduces the risk of ...
4
votes
3answers
2k views

Histidine aromaticity

I understand that the imidazole ring in histidine is aromatic. I also realize that it retains it's aromaticity when protonated. I am wondering why it is not mentioned at all in basic text books such ...
3
votes
1answer
103 views

Can insects feel pain?

Insects do have a nervous system, even if it isn't nearly as complex as that of other animals. Can insects or other arthropods sense pain? Does their aversion to harmful stimuli suggest that they can ...
3
votes
2answers
110 views

Humidity for wood rotting

If I put a piece of wood in a humid environment (basically humid air), it will start to rot. Does the humidity influence the rotting speed, and if so, what is the relation between the rotting speed ...
2
votes
1answer
51 views

How are dental cavities different from body injuries?

I always had this question why dental cavities cause pain. I stumbled on this question on the reasons why dental cavities are painful. I have a followup question on how dental cavities are different ...
2
votes
1answer
1k views

Why does temperature shock kill fish?

As is advised with most fish you should avoid sudden changes in water temperature (for example by introducing new water that hasn't been left to come to room temperature). I have, however, never ...
1
vote
3answers
122 views

Which point mutations in proteins are OK, and which cause significant change?

I heard that some point mutations in proteins are OK, like from alanine to glycine (I'm not sure, it's just an example), some will change the protein significantly. I want to understand deeper but ...
3
votes
1answer
44 views

Can a postsynaptic neuron 'shut itself off?

I am an amateur interested in neuroscience and was curious whether there is a process by which a neuron or group of neurons would close their receptors and stop receiving signals from specific ...
4
votes
1answer
131 views

Identification of this Salamander

This salamander was found in a small forest pond somewhat near the Oregon coast. In the area are many rough skinned newts and a small number of another type of salamander that I still can't find the ...
2
votes
3answers
121 views

What equipment would one use to modify a virus? [closed]

Would anyone be so kind as to give me a few examples of the equipment involved when modifying a virus? Otherwise my novel may end up reading Eva entered the lab and modified a virus. Not much back ...
1
vote
0answers
222 views

Are insects attracted to near infrared light?

Do insects see near infrared light? If yes, are they attracted to it at night, as they are to visible light sources? I am building something similar to a home-made trailcam with a Raspberry Pi ...
2
votes
1answer
69 views

Could an annual plant be genetically modified to be a perennial?

My chives, asparagus, oregano, and rhubarb come back every year like clockwork. Suppose I want my bok choy to join the party - is there an "I'll be seeing you next year!" gene that can be modified to ...
1
vote
1answer
48 views

Alleles notation in SNPPedia criteria

I can understand the allele notation when is in the form rs8176719(T;T) or rs8176719(G) but recently i found this ones rs8176719(T;-) or rs8176719(-;T). So im confused, rs8176719(T;-) is the same as ...
2
votes
2answers
433 views

Do females living on mountains have more RBCs than a normal male [closed]

I got this doubt when I was studying about haematocrit value. According to my NCERT textbook males have greater number of RBCs than females. But who will have more RBCs when comparing a normal male ...
1
vote
1answer
29 views

A question on exclusion of study participants for an Exome genotyping array

I'm reading a paper that used whole exome sequencing on an African American and European populations to discover novel low frequency and rare variants associated with lipid levels & the risk of ...
3
votes
1answer
442 views

How does the Cuttlefish camouflage itself accurately despite being color-blind?

I have seen/read that the Cuttlefish is able to camouflage itself extremely accurately. I have also seen/read that they are completely color-blind, though see with very high contrast. How does the ...
1
vote
1answer
64 views

Does Yerba Mate contain Beta carbolines like harman and norharman?

I know that this is true of (roasted) coffee but haven't been able to find any reliable information about mate in its smoked or steamed state. Thank you.
1
vote
0answers
80 views

What is Mycoplasma Lyo medium?

Used for instance in this article The role of genital mycoplasmas as pathogens - - are generally neglected by diagnostic laboratories in the United Kingdom, possibly due to the lack of a ...
1
vote
1answer
80 views

Recombination-based vs. Sequence-based genetic mapping

Now that sequencing is becoming increasingly cheap, what is the value of recombination-based genetic mapping against the sequence-based genetic mapping? I think that in the past recombination-based ...
5
votes
2answers
270 views

Species of this White Dove

I visited a bird enclosure close to where I live in Australia. The enclosure had several different species. The birds that stood out most were these doves sitting right along the fence railing, making ...
1
vote
1answer
59 views

will an earthworm survive after covering its skin with a wet cloth

I am very curious about this question. I got this doubt when I was studying anatomy and physiology of the earthworm Lampito mauritii. It breathes through its skin (cutaneous respiration) and if we ...
3
votes
1answer
33 views

A question on ImageQuantTL

I am confused about using the ImageQuantTL application as a tool to analyse the Urea Gel. My problem is that I am not sure if the 'shape' for calculation should be the same for all samples (like on ...
1
vote
1answer
38 views

Investigating rare variants in ethnically different populations (European ancestry & African ancestry)

If you are investigating low-frequency and rare variants for a complex trait using exome sequencing, why would one consider using different populations (African ancestry and European ancestry) ...
4
votes
1answer
165 views

Functionality of vitamin A, Bx, C, D, E, K as used in cosmetics for the skin?

I was wondering if someone can compare the functionality of vitamin A, Bx (x means numbers, such as 1, 2, 3, ...), C, D, E, K in the skin? They are used in cosmetics but what is their actual effect? ...
6
votes
1answer
2k views

How does heat shock transformation work?

What exactly happens when competent cells like DH5ɑ are heatshocked with DNA present? How does the DNA get inside the cells? Specifically, why are all the steps necessary? What if you heatshock right ...

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