0
votes
1answer
26 views

Known MicroRNA - Gene Systems?

Have there been any experimentally-verified systems of microRNAs targeting a gene set (e.g., in cancer, perhaps)?
3
votes
1answer
124 views

Do insects respond to the detection of dead insects?

Are there insects that change their behavior upon detecting the nearby presence of other dead insects? If there are, can you provide an example?
3
votes
1answer
842 views

Why does the stomach ache if you take a brisk walk after lunch or dinner

After eating your lunch or dinner, if you take a brisk walk, most of the time your stomach aches. Why does that happen? What happens with respect to the body metabolism?
2
votes
2answers
3k views

What is genomic imprinting?

What is a genomic imprint? How does genomic imprinting take place? If I say that "this" allele is maternally imprinted does it mean that the allele of the gene is passed only by the mother? If a ...
2
votes
1answer
56 views

Determination of gene direction

I have one sequence that composed of sequences of three genes. I should determine the direction of each gene, but two of these genes are disrupted, and I can't determine the initial codon. Does anyone ...
5
votes
2answers
108 views

Are SLC52A2 and GPR172A really the same?

The official HUGO gene nomenclature page says that GPR172A (Gamma-hydroxybutyrate receptor) and SLC52A2 (riboflavin transporter, member 2) are the same. The sequence reported by Andriamampandry seems ...
2
votes
1answer
63 views

Use of pigs for obtaining transplant organs

It is being said that organs can be obtained for transplant from the pigs. What is special about pigs that we are using them? Why can't we use monkeys or chimpanzees with whom we share a more recent ...
2
votes
1answer
66 views

What decides the position of the node of Ranvier?

The oligodendrocytes makes the myelin sheath in CNS and schwann cells make it in PNS. What decides where the oligodendrocyte or Schwann cell will attach and start forming myelin sheath? Is it ...
4
votes
2answers
350 views

How can sex ratios remain Fisherian (1:1) in species where only the dominant male gets to mate

In certain species only the dominant male gets to mate (or given strong preference), and yet the sex ratio remains 1:1. (I'm thinking in particular of gorillas). How does this happen? It doesn't seem ...
2
votes
1answer
954 views

Difference between viral and human genetic material

I have heard that there is a difference between viral and human genetic material. What is that difference? If I take my cells and take DNA out of them and insert only a small part of it having a ...
2
votes
2answers
237 views

Why did Fair Meiosis evolve?

How and why did Fair Meiosis evolve? I can hardly think that it provided a fitness advantage to the individual carrying the mutation. Why would it? Or did it evolve through lineage selection? Or was ...
4
votes
1answer
113 views

Randomness in living systems

The point of my question is not to talk about events that are uncontrolled by living organisms. My question is about controlled randomness, or I'd like to say adaptive random process. Process that are ...
9
votes
3answers
5k views

Can one die from pain?

Is it possible that a human or any other creature can die from pain? I googled and found different answers. Some articles say Yes while others say No.
2
votes
1answer
132 views

What areas of the brain are involved in doing arithmetic operations?

Do neuroscientists already know what areas of the brain are involved in mental calculations? Has any fruitful research been done on that or not yet? Do you think that if we understand what areas of ...
1
vote
0answers
110 views

Green feather-like formations in tap water - what is it? (with pictures)

These things recently appeared in my tap water Copenhagen Denmark, this summer 2013. They are very small, and have a feather like structure. I've called the water supply, and they thought that it was ...
1
vote
1answer
163 views

If people with colorblindness lack one type of cone cells, shouldn't they be unable to recognize one particular color?

The 3 types of cone cells in normal humans allow them to view 3 types of colors and any color made from mixing and matching those 3. So, 2 types of cone cells should only allow to view just 2 types ...
2
votes
2answers
114 views

Do people with colorblindness have less cones or no cones of a certain type?

https://en.wikipedia.org/wiki/Color_blindness#Red.E2.80.93green_color_blindness Protanopia (1% of males): Lacking the long-wavelength sensitive retinal cones, Deuteranopia (1% of males): ...
1
vote
1answer
128 views

Molecules and human memory

Has it been demonstrated that the memory of human brain is just connections between neurons, not "long" molecules such as RNA or proteins?
6
votes
2answers
344 views

Is there a preferred sleeping position for humans?

I remember hearing various sleep related advice as a child, like "sleep on your right side", or " have your head pointed in X direction". Is there any biological reason why sleeping on one side ...
5
votes
2answers
64 views

Are there any pathogenic archaeans?

Most textbooks seems to restrict pathogens to the domains bacteria and eukarya. Are there any pathogenic archaeans?
2
votes
1answer
165 views

What kind of insect is this?

Found in Russia in the kitchen. It is about 3 mm long.
1
vote
1answer
4k views

Is Diabetes sex linked disease

There are two types of diabetes mellitus. a. Type 1 diabetes mellitus b. Type 2 diabetes melliuts Is either of them a sex linked disease? Can either one be inherited? My book says, "this disease is ...
3
votes
1answer
61 views

Is it possible to clone a Neanderthal?

As Neanderthal DNA has been sequenced, is it possible to create a living Neanderthal?
0
votes
1answer
57 views

Cell state and cell function

I have read many papers that refer to cell type, cell state and cell function, but I haven't found an explicit definition for each of these terms. For example this paper (Brown et al. 1994. J General ...
6
votes
2answers
3k views

Species Identification - small insect: is this a bed bug?

I found this bug in my apartment in Chicago. We had bed bugs in our house the previous year (but we thought we got rid of them). This bug was very small - maybe 2 millimeters in length. These ...
1
vote
1answer
5k views

How are the paranasal sinuses linked with the capillaries in the ear canals?

Sinus congestion often seems to be accompanied by excess pressure on the outer ears (as anyone who has shared a transcontinental flight with an infant can attest to) or fluid buildup in the canals. ...
0
votes
1answer
26 views

Utilising Mycorrhizal Association

We know that mycorrhizal association helps the plant to absorb nutrients. Why can't this association be exploited in agriculture ? Can't we add spores of the specific fungi to specific plant and ...
7
votes
1answer
126 views

Any food crops that could grow in a desert provided that they get fertilizer and water

I am working on an idea to provide nearly unlimited amounts of water in desert regions. To make this commercially viable. I would use the water to irrigate desert sand and grow crops. Given my ...
5
votes
1answer
63 views

What method would you use to genotype SNPs in low quality samples?

What method would you use to genotype SNPs in low quality samples? I ideally want to genotype hundreds of SNPs in hundreds of scat samples (very low amount of target DNA, potentially degraded and ...
4
votes
1answer
7k views

Is there a difference between NADH and NADH2?

I've been reading a lot about the oxidative dissimilation etc, and often I see different sources use NADH and NADH2 in the same reactions. One source uses NADH and another uses NADH2 in the exact same ...
1
vote
1answer
10k views

Can white eggs be considered as non-vegetarian? [closed]

I am basically a vegetarian and I find it very difficult to get an actual biological answer for this question on search engine. There are couple of links which discuss these argument but can not be ...
1
vote
1answer
99 views

Is “Fight or Flight” distance genetic

If you took a newborn animal and completely isolated it from its species, would it be capable of assuming a fight or flight distance preset by its species, due to their being no basis for what could ...
2
votes
1answer
756 views

Do body lotions enter into bloodstream of people? And how do they do it?

I found this very disturbing: bombastic tabloid-style writing in capital and the content is doubtful. If it was correct or close "does it really take something like 26 seconds for a body lotion ...
1
vote
0answers
25 views

Effect of applying fungicide to a field [closed]

What would happen if we apply fungicide to a corn field , would the Net Energy Production increase or decrease ?
4
votes
1answer
92 views

What triggers DNA to produce proteins?

What is the trigger for DNA to produce proteins or RNA? I have found enough material to study the inner workings of the cell and DNA; but, I can't find an explanation of the mechanics the cell uses ...
0
votes
1answer
137 views

All or none phenomenon

Let's say that the threshold potential of a neuron is +40 mV to make a muscle twitch. Now suppose we have two signals of +20 mV. So, this signal will cause the twitch in muscle because it has reached ...
0
votes
1answer
76 views

Non toxic low melting point alloy

I am looking for an alloy with low melting temperature (< 350°C) which is not toxic when in direct constant contact with skin, food and overall in domestic environment. My application is a solder ...
1
vote
1answer
71 views

Botulinum Toxin

I asked on the cooking site, but was directed here. This is my original question http://cooking.stackexchange.com/questions/35726/botulinum-toxin-in-home-canned-green-beans The reading is quite ...
3
votes
2answers
331 views

Why are there so many medicinal plants?

Here is wikipedia page containing a list of plants used in herbal medicine. One might first want to argue that many of them actually do not have any medicinal/beneficial effect on heatlth. I think we ...
5
votes
1answer
182 views

How can we tell which direction sound is coming from?

Pretty self descriptive, without being able to view the source of the noise how can we tell the difference between a sound in front of us and a sound behind us if pitch, volume and distance are all ...
3
votes
1answer
40 views

Genetic variation in humans and model organisms (measured by SNPs)

I was wondering what is the range of SNP density across species and model organisms. I.e., what would be a reasonable estimate for the SNP density (i.e., x SNPs for each 1 Kb) in: humans humans ...
-2
votes
3answers
701 views

How does the modern theory of evolution solve these apparent problems? [closed]

I hold to the truth of Evolution, but I've encountered several problems with it, that I can't answer, and I can't find an answer for, despite much research. If would be great if anyone can answer ...
3
votes
1answer
87 views

What is a good source for info on disease frequency distribution among age groups?

I need information on the disease frequency distribution among age groups for an Android app I'm building... Hopefully I've come to the right place. Is there a good data source for this? Like a ...
3
votes
1answer
228 views

molecular indicators of apoptosis: clarification needed

I understand that DNA fragmentation is a molecular indicator of apoptosis. What distinguishes this as a hallmark of programmed cell death, versus one of necrosis?
1
vote
1answer
193 views

Raphide toxicity in Pothos plant

Recently I found out that the common houseplant Pothos (Epipremnum aureum) is toxic to cats and dogs due to the presence of "insoluble raphides." I have a lot of these plants around my house and my ...
7
votes
1answer
377 views

What biological processes cause leaves to change colours in Autumn?

I am curious to learn what are the biological mechanisms that cause leaves of deciduous plants to change colour? What happens to the chlorophyll? What environmental phenomena (temperature/air ...
6
votes
2answers
523 views

Goats are so fearless but sheep are not. Is there any genetic difference responsible?

As you see in the picture goats (not only wild goats) are so fearless, but I never saw any sheep do this. What is the source of this difference in behavior?
3
votes
1answer
340 views

Is there a difference between pig and cow anatomy that makes religious slaughter of the latter less painful?

This question is not for the squeamish. I was told that non-Kosher animals like pigs have a different anatomy in their neck compared to kosher animals like cows such that the Shechita method of ...
5
votes
1answer
1k views

Why don't antibiotics affect mitochondria?

Given that mitochondria are evolutionarily closely related to bacteria, and antibiotics kill bacteria, why don't antibiotics also kill mitochondria?
1
vote
2answers
73 views

Collective term for both exons and introns

Is there a term I can use to refer collectively to both exons and introns? By collectively, I don't mean ligated as with an unprocessed transcription product. I'm just writing about exons and introns ...

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