3
votes
2answers
350 views

Confusion about resting membrane potential and the Na/K pump [duplicate]

To this day, very few people and sources have been able to clear up my confusion about resting membrane potential and how it is maintained. It seems like this is one of those topics that few people ...
10
votes
2answers
149 views

Protein tertiary Structure formation

As we know that coils and loops are evolutionary variable regions where mutations,deletions, and insertions frequently occur. So does it mean that they don't have much role in the structure of protein?...
1
vote
0answers
23 views

Infer type of nucleic acid based on number of nucleosides

Lets say we analysed a nucleic acid and found out that it had 20% Adenosine, 25% Guanosine, 40% Thymine and 15% Cytosine. We know that A always pairs with T and G with C. So, based on these numbers, ...
0
votes
1answer
165 views

Is an athlete's heart rate after exercise greater than a non-athlete [closed]

I was just wondering And if it is greater or lower how does this benefit an athlete Also what is the averaged number of heart beats per minute
19
votes
1answer
3k views

What is the speed of blood?

The speed of blood may vary from one place to another and may be quite low in the tinyest vessels compared to the biggest one. What is the speed of blood while exiting a normal human heart?
0
votes
0answers
23 views

is there any relationship between shape of the nucleus and the function of the cell?

is there any relationship between the shape of the nucleus and the function of the cell, like in the case of leukocytes, all of them have different shapes.
1
vote
1answer
66 views

Can exhaustive algorithms produce MSAs that are suitable for 3D structure modelling?

While predicting 3D structure of a protein through homology modelling, the most important step is Multiple Sequence Alignment of template sequences with the target protein whose 3D model is to be ...
1
vote
0answers
31 views

Why do the vines change their spinning direction?

Look at the vines holding onto the lattice. The "vine springs" change their spinning direction in the middle. Why? And how do they achieve this? (By the way, what's the name for this plant? Is is ...
3
votes
1answer
77 views

Prediction of transmembrane beta barrels?

I studied that prediction of transmembrane alpha helices is more easy and accurate and also good algorithms are available for their prediction. But when we move towards prediction of transmembrane ...
0
votes
1answer
23 views

Where can I find SSR and/or SNPs that locate RC1 genes in Soybean? [closed]

Where should I look to find SSR and/or SNPs that locate RC1 genes in Soybean?
0
votes
0answers
20 views

Is it possible for two creature in the same order and have odd haploid chromosome species to reproduce

Take the degu and the rat for example. The degu has 29 chromosome pairs Rats have 21 chromosome pairs. They are only share the same order ( Rodentia ) Would it be possible for them to reproduce? ( ...
1
vote
1answer
13 views

Is there one centomere for the two chromatids in a dyad? [closed]

I have no explanation for this. It is all I have to ask. Thank you
0
votes
0answers
45 views

What is plectonemic coiling? When does it uncoil?

Is it the inseparable coiling of two double stranded helices (each representing a chromatid)? In early prophase the chromosome appear as coiled filaments but in late prophase each chromosome has two ...
0
votes
0answers
75 views

Why doesn't hair grow all over your face?

Why doesn't hair grow all over your face? Surely hair on a face would have blocked the sun and kept it warm. Or perhaps through natural selection we opted for hairless faces over hairy ones?
5
votes
0answers
59 views

What is the reason for fear induced defecation?

I started to handle mice for my job and noticed that they tend to defecate and/or urinate when they are scared. The fear is induced by me, because I need a long time (due to inexperience) to grab the ...
0
votes
0answers
31 views

Do elephants get thorns out of each other's skin?

I have watched Wild Kratts Elephant in the Room several times where a baby elephant named Thornsley has a big thorn in his foot and is nowhere near his mom. This along with herd members helping each ...
0
votes
0answers
22 views

Cytokine screening

I am measuring IL-6 production by NF-κB stimulation using IL-1α and TNFα. Il-1 produces a stronger degradation of IκBα (inhibitor of NF-κB). I've done this using ...
1
vote
0answers
18 views

How to Download the broadpeak files from the encode chip-seq experiment matrix? [closed]

I have tried the SqlDatabase of Encode opened it trough R ,i have tried other packages in R, i have tried the ENCODExplorer package but none of them seems to do what i want. I have an app that asks ...
-1
votes
1answer
82 views

Am I a lobe-finned fish? [closed]

I really wish this question only contained the title and tags, but the website forces me to write some text.
3
votes
0answers
61 views

How did dolpins acquire the dorsal fin?

I had been thinking bout atavism when I saw a picture of a dolphin. I had seen it before, but suddenly the dorsal fin startled me. How did this dorsal fin evolve, especially, is it some atavism from ...
6
votes
1answer
75 views

How does a seed determine when to start germination?

I'm sure there are many different ways for seeds of different species, but what is a general rule? Is it some kind of ideal temperature & wetness that triggers a chemical reaction? What factors ...
4
votes
1answer
177 views

Why is ab initio protein secondary structure prediction less reliable than alternatives?

To predict secondary structure of proteins three types of Algorithms are used Ab initio, homology based and neural networks. Among these neural networks prove to be more accurate and give good results ...
1
vote
0answers
37 views

Does sickle cell anaemia protect a victim against malaria? [duplicate]

My biology textbook says that a person with sickle cell anaemia is less prone to malaria. Why is that so? I'm guessing that its because the malarial parasite needs human RBCs for completing its life ...
0
votes
1answer
83 views

Why is it not advisable for humans to drink distilled water? [duplicate]

Distilled water is pure and it does not contain any minerals, so may not be advisable for drinking. Although laboratory made distilled water is completely pure, industry made water may still contain ...
1
vote
0answers
94 views

What type of point mutation and chromosomal mutation cause Albinism in humans?

First of all, I know that OCA1 (Oculocutaneous Albinism Type 1) is autosomal recessive which means that both parents-who are unaffected-have to pass down one copy of a mutated gene in order to ...
1
vote
0answers
53 views

Why are there different species of bacteria?

The usual (high school or intro to bio) explanation for diversification of species comes from multicellular, usually sexually reproducing organisms, and seems to be closely tied to the biological ...
0
votes
0answers
29 views

What good are mosquitos? [duplicate]

Mosquitoes have been getting a bad press lately, for transmitting malaria, dengue, zika and numerous other diseases. Some reputable scientists are now talking seriously about extinguishing (making ...
1
vote
2answers
71 views

How prevalent is sexual dimorphism?

I'm writing a lab on sexual dimorphism (sex differences in phenotypic traits) and I want to include a sentence in the abstract that states how prevalent sexual dimorphism is. However, I can't find any ...
2
votes
1answer
110 views

Is eye colour of Drosophila a polygenic trait or an X-linked trait?

I have seen examples of various eye colours in Drosophila and they have been described both as "X-linked" and "polygenic". I thought these were mutually exclusive. Is Drosophila eye colour polygenic ...
6
votes
1answer
100 views

Is Asteraceae and Compositae the same family?

I'm wondering what taxonomic family sunflowers (Helianthus) belong to. Although it's mentioned it belongs to family Asteraceae it is also a composite flower. So it belongs to Asteraceae or Compositae ...
0
votes
1answer
72 views

How are 6 “fixed” CO2 molecules joined toegther as glucose?

When we study calvin cycle, we study it with 6 molecules so as to form 1 glucose in a single cycle as: 6 RuBP + 6 CO2 => 12 3-PGAL => 1 Glucose + 6 RuMP But if we look deep, then we know that the ...
-1
votes
1answer
100 views

What is the probability of genetic reincarnation? [closed]

Parents pass on 23 chromosomes to their children, with a 50/50 chance for each chromosome. Considering that people of a families lived over millennia in the same region the abundance of some ...
1
vote
0answers
11 views

Function of NEZHA gene [closed]

What is the function of NEZHA? What effect does it have on microtubules and PLEKHA7? What happens after it has been knocked down?
3
votes
0answers
32 views

Is the male satin bowerbird's bower-building behavior innate?

The male satin bowerbird builds a stick structure, known as a bower (distinct from a nest), where courtship and mating take place. They curiously decorate their bowers using blue or shiny objects. ...
0
votes
0answers
12 views

Are receptors integral membrane proteins or peripheral membrane proteins?

In tegral membranes serve as transporters. Peripheral protiens serve as cell adhesion molecules, antigens and enzymes. So what about receptors? Which protiens carry out the duty of receptors?
4
votes
2answers
164 views

Brain wave and motor movement correlation

I am trying to better understand which brain waves are generated when the motor system (arms, legs, muscles of any kind) are activated. According to Wikipedia, several types (Beta, Gamma, Mu) appear ...
7
votes
2answers
210 views

What is this blue-green bioluminescent jellyfish I saw at Aquarium of the Pacific?

I took this picture of an animal in the bioluminescent section of Aquarium of the Pacific in Long Beach, California, but I neglected to write down what it was. I've searched the Aquarium's web site, ...
1
vote
1answer
79 views

Why does HPV Infect Squamous Epithelial Cells and Not Others?

I've seen this question about HPV and the reference therein. The link states "Human papillomavirus (HPV) is a DNA virus that presents tropism for epithelial cells, causing infections of the skin and ...
1
vote
1answer
99 views

What's the mechanism or structure responsible for new species genetic code generation? [closed]

I always had this question in mind. I think, If humans find answer to it then we can trigger the next evolution of human specie. What is the mechanism or structure responsible for evolution ? I don't ...
3
votes
0answers
42 views

The evolution of poor eyesight: is there weaker selection in modern humans? [duplicate]

Short question: Poor eyesight might have been a major impediment to survival and reproduction in early man (say, 100,000 years ago), but, with the advent of agriculture, major cultural changes, and ...
4
votes
1answer
93 views

Why it seems that principles of chemistry are not being applied in this biochemical process? [closed]

According to an answer in this question, my concept used below does not apply: In the non-cyclic photophosphorylation, consider splitting of two water molecules, then 4 e- (electrons) and 4 H+ (...
-2
votes
1answer
81 views

Why plants and animals are so different even though they come from the same ancestors?

All the documentaries I have watched, books I have read so far on the starting of life on earth only talk about animals. The very first life form on earth was bacteria. Then evolution took us this far....
0
votes
0answers
45 views

What’s wrong with a shriveled cell?

When you place a cell into a hypotonic solution, water rushes into it and it bursts/lyses. Thus, the cell dies. However, when you place a cell into a hypertonic solution, water rushes out of it and ...
5
votes
1answer
61 views

Why eyes don't get heated while converging sunlight into retina?

It is a common observation that a magnifying glass when used to converge rays of sun to a fine point in paper, the paper burns due to intense heat. Why doesn't this happen in our eyes? Our eyes are ...
1
vote
2answers
112 views

Are human beings evolved to eat meat? [duplicate]

I know humans can cook, and prepare almost anything, but are humans specifically adapted to eat meat. One of my doubts humans are not particularly well adapted to eat meat because they lack canine ...
2
votes
2answers
23 views

Ions in Stomatal Opening Mechanism

When a stoma’s guard cells try to swell and open the stomata, they actively pump out protons outside of the cell. This causes a membrane potential, where the inside of the cell is negative with ...
3
votes
1answer
40 views

Efficacy of the 10-20 montage for EEG

I am trying to better understand the relationship between the placement of EEG electrodes and the quality of the "brainwave" signals they produce. There is the standard 10-20 system which has me ...
1
vote
1answer
154 views

Would urination continue after death?

If someone was urinating, and they were to hypothetically suddenly "fall dead" (the brain is unconscious and all muscles / organs are unfunctional), would they continue urinating or would it stop?
2
votes
0answers
33 views

Why lactate inhibits growth (or enhances death rate)?

Extracellular lactate tends to inhibit cellular growth or enhance cell death. This happens in the vicinity of tumors and in cell cultures. See for example this reference: Ozturk, Sadettin S., Mark R....
0
votes
1answer
39 views

Converting miRNA names

I need to convert all of my microRNA names e.g. hsa-miR-30e-5p to e.g. entrez gene IDs, ensemble IDs or another ID. Does anyone know a good ID conversion tool for microRNAs? (I managed to convert it ...

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