All Questions

0
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0answers
2 views

Is Norepinephrine beta2 adrenomimetic?

I know that it has alpha1, alpha2 and beta1 effects. It has beta2 receptor where epinephrine can effect. However, to say that it is beta adrenomimetic, I am not sure. That is ligand binding beta2 ...
0
votes
1answer
6 views

Why does A pair with T and G with C?

DNA is made up of pairs on AT and GC base pairs. I know that A only pairs with T and G only with C. Does this apply just to humans, or are there animals where T will pair with G? Also, surely there ...
-1
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0answers
10 views

Are there 23 pairs of chromosomes present in each cell, or in the entire human body? [on hold]

There are 23 pairs of chromosomes. Are these present in each cell, or are there just 23 pairs present in the entire human body?
0
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0answers
4 views

Can choline-receptor stimulatants block cholinesterase inhibition?

I am thinking what are the possible options of terminating suxamethonium i.e. succinylcholine activity. Succinylcholine is enzymatically hydrolyzed by plasma cholinesterase. Can choline-receptor ...
0
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0answers
6 views

Is there any way to make pymol find the closest distance between RESIDUES?

This seems like an obvious utility, but I can only make it find the closest distance between ATOMS, which makes a big mess on the screen.
0
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0answers
7 views

Is one metabolomic database more searchable than any other? [on hold]

What makes one metabolomic databases eg. HMDB more search worthy than any other? Is it possible to have a general criteria since there is not one search reason? Is there any that have more user ...
0
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0answers
6 views

Milder hyperlipidemia in hypercholesterolemia?

My professor suggested that in polygenic hypercholesterolemia, the overall lipid level does not increase so much as in LDL receptor defect patients. She also mentioned something about the dilution ...
0
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0answers
4 views

Is glyceraldehyde-3-phosphate converted to glucose via gluconeogenesis in photosynthesis?

At the end stages of photosynthesis, one would assume the process of going from G3P to glucose is simply the reverse of glycolysis (gluconeogenesis), but is it?
-1
votes
2answers
18 views

Bird identification [on hold]

I got a statuette of a bird, carved of semi-precious minerals, but with its tail broken off. I'd like to restore it, rebuild the tail, but I'd first need to know how it should look like. Can you help ...
-6
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0answers
19 views

Why can we see so many different types of mushrooms if we assume that they arrived to Earth on a comet? [on hold]

Why can we see so many different types of mushrooms if we assume that they arrived to Earth on a comet? I mean they don't have to have bright colors to attract bees or birds for their reproduction. ...
0
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0answers
3 views

How much mmol/L of glucose does my dog extract from his meal into his blood?(at least roughly) [on hold]

In the context of insulin dependent diabetes(assume there is no glucose suppression in the blood at all, not even from the kidneys). I can find out the content of carbohydrate, but, I don't know what ...
0
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0answers
5 views

Function of Vermiform Appendix [duplicate]

Why is the Vermiform Appendix(a finger-like projection at the end of caecum of large intestine) called a vestigial organ even though it acts like a lymphoid organ?
2
votes
1answer
14 views

Action of Ebola Viruses

This video suggests that the first cell to be the victim of viral infection of ebola is the dendritic cell which acts as the leader of immune system cells.But I am unable to understand how the ...
0
votes
0answers
8 views

Substrate specificities of GPPS, FPPS and GGPPS (isoprenoid biosynthesis enzymes)

I have some questions related to isoprenoid synthesis enzymes. Does Geranylgeranyl pyrophosphate synthase (GGPPS) contribute in Geranyl-Pyrophosphate (GPP), Farnesyl pyrophosphate (FPP) and ...
1
vote
0answers
16 views

How to compare a camera and an eye

How could I compare what a normal eye can see to a camera lens? I just went through a very comprehensive article @ CambridgeInColor, but I'm still not really clear. When I take a picture with a SLR ...
1
vote
1answer
17 views

Ants eating bark

Was out walking in the park today, came across a tree, and me being me I thought "Hey lets try climbing this thing for fun." But something strange struck me, the tree was completely devoid, as in ...
0
votes
0answers
12 views

What type of bacterial colony is this?

I am having trouble identifying the microorganism in the picture. I think the shape is rhizobium and probably a bacillus, but I can't narrow it down from here. It was grown on agar plate with ...
3
votes
1answer
24 views

Looking for a gene in my raw genetic data. What are the possible causes for this?

Obviously, I barely know what I am talking about. But I want to find the "MUC5B promoter polymorphism rs35705950" in my RAW genetic data from 23andMe. (see this ...
2
votes
0answers
19 views

ECG of heart transplant patients

I am studying ECGs of heart transplant patients. The difficult thing is that there is so little available data publicly. I must apply for data in my universities. It would be also great if ...
1
vote
0answers
12 views

Why cytotoxic T cells don't kill dendritic cells when they present antigen?

When a cytotoxic T cell (CTL) recognizes a peptide presented in the MHC-1 of a dendritic cell (APC), why it doesn't kill this cell? I know that initially, in the lymph node, the T cell is ...
0
votes
0answers
14 views

How is the loss of blood estimated after trauma?

How do medical professionals measure/estimate/guess the loss of blood after an accident?
0
votes
1answer
20 views

why is heart failure treated as more critical than kidney failure?

The kidney filters blood whereas heart pumps the blood. Filtering blood is important. Therefor why is heart failure treated as more critical than kidney failure?
1
vote
2answers
65 views

Like other animals, why humans don't have species & breeds?

Like other animals, why don't humans have species & breeds ? Even my pet dog is one type of breed, but we (humans) lack breeds & species? What is the main reason?
1
vote
1answer
24 views

Are bees positively phototropic

One day I had found some bees have come around the light source like other positively photo tropic insects, I hadn't seen any bees coming over light before. I think bees are diurnal and they don't ...
2
votes
0answers
23 views

Any benefit to low dose radiation?

Is there any survival benefit in humans that can be obtained from chronic exposure to low dose radiation, or is any dose of radiation a potential harm? Has any research been done into this?
0
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0answers
16 views

Is it true that there is a finality in nature? [on hold]

Every biologic thing having its own purpose; for example a carnivore flower that attracts a fly to eat it. Or a flower having seeds that spread with the wind. Or the liquid in which the foetus float ...
0
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0answers
40 views

Tricky DNA and RNA question [on hold]

Information storage and transfer are the critical functions of nucleic acids. Which of the following is/are important characteristics of the sugar phosphodiester ester linkages in the backbone of ...
0
votes
0answers
17 views

Is natural absense of appendix result of the internal evolution? [on hold]

If we say that living organism is file of cells what absorbs nutrients, develops and responds to stimuli, we can say that any organ is a living organism - and if the organ has no function, it will not ...
0
votes
2answers
36 views

Counting the number of hydrogen bonds of multiple PDB files

I've been trying to figure out a systematic way to count the number of hydrogen bonds for multiple PDB files. DSSP shows me the total number of hydrogen bonds when I make ...
0
votes
0answers
19 views

Quetiapine tolerance

I've researched quetiapine for quite some time now and I've found some references to tolerance, but nothing conclusive. My question is whether quetiapine use builds tolerance to the drug and if so, ...
0
votes
0answers
23 views

What's the max speed that humans could run? [duplicate]

Assuming humans could use all of their muscle strength at once, with no need of cooling or energy, how fast could we theoretically run?
0
votes
1answer
28 views

Why we do not use RNAi to control ebola?

As you know using RNAi we are able to prevent gene expression. so why we do not use it to stop viral genes expression?
1
vote
1answer
17 views

Testing monophyly from per site log-likelihoods without optimising branch lengths

How can I obtain per site log-likelihoods for a topology against an alignment without optimising branch lengths? (which software can I use to do this) Per site log-likelihoods can be used for various ...
1
vote
1answer
43 views

Why do people and animals stretch out their bodies and what is causing this behaviour?

I noticed that my cat which is only 6 months old has started stretching its body from time to time. Then I thought that this motion doesn't seem very natural from another cat's viewpoint, so my cat ...
1
vote
1answer
21 views

Does methanol fixation deform cultured cells?

I use methanol fixation (@ -20⁰C for 10 minutes) when performing immunofluorescence assays on cultured cells. Generally speaking, this results in very good antibody staining. However, the cells tend ...
2
votes
0answers
20 views

What are parental antagonism & parental conflict?

I've been reading the chapter by Haig et al in The Genetics and Biology of Sexual Conflict. I think this chapter has them quite unclearly defined. Could anyone describe these two phenomenon more ...
1
vote
1answer
24 views

Why do humans have irregular teeth and impacting wisdom teeth?

Imagine that horses, dogs, bears, and gorillas had teeth as unreliable as humans do, The interruption in behaviour and stress brought by teeth would cause them to be more prone to sinus infections, ...
0
votes
1answer
25 views

If a shark is bleeding in the ocean, will another shark attack it?

I'm not sure how sharks hunt for their prey; so I don't know if this is an appropriate question to ask.
2
votes
0answers
31 views

Time for rigor mortis to set in

Rigor mortis sets in due to non-functional "ATP powered calcium pumps" as a result of which the calcium ions stream out & the muscles remain in a suspended animation state. But, it's a frequent ...
2
votes
1answer
116 views

Is excessive hydration a risk factor for cancer in humans?

I was reading a book on radiation biology, and the book describes the process of "indirect action", where radiation can first ionize a water molecule forming a free radical, which then may interact ...
2
votes
1answer
25 views

Alternatives to commercially available flow cytometric analysis software for use in cell cycle analysis?

I know that many labs use either FlowJo or FCS Express to plot and analyze their flow data. These seem like the two standards for most labs (and I have used FlowJo before). However, my current funding ...
-1
votes
0answers
12 views

What side effects occur with electrolarynx? [on hold]

What happens when person with healthy larynx uses electrolarynx? I mean would the result produces sound effect similar to that of Peter Frampton?
2
votes
2answers
79 views

What is possibly wrong in my gel electrophoresis when I didn't see bands of DNA ladder on gel? [on hold]

What was possibly wrong in my gel electrophoresis when I didn't see bands of DNA ladder, and genomic DNA sample on gel ? I could see bands of genomic PCR and RNA solution. Edit Thank you all of guys ...
0
votes
1answer
38 views

What is the chance that insects derive from extraterrestrial organisms? [on hold]

I have long had the idea, and I think I've also hear it on TV, that insects could be descendants from organisms arriving Earth with meteors. The inside difference between insects and other animals is ...
0
votes
1answer
32 views

Why does dogs chase cats? [on hold]

This seems a little weird to me.....Cat normally does not fit into a dog's food list....So why this peculiar, energy-wasting behaviour???
0
votes
0answers
13 views

How does inflammation life span? [on hold]

I have more than once read that inflammation is linked to increased all-cause mortality. But how is this linked? What proteins/organisms/processes/w.e cause this all-cause mortality? And how strong is ...
0
votes
0answers
14 views

Authoritative online dictionary of immunology terms?

Is there an authoritative and peer-reviewed online dictionary for immunology? I am referring specifically to the terms you find on papers, such as standard abbreviations for molecules, genes, mouse ...
1
vote
1answer
30 views

What are some difficulties animals had to overcome to reproduce on land?

This is for AP Biology, but the assigned textbook chapter doesn't contain any information about the question. What are some difficulties animals had to overcome to reproduce on land? Some ...
0
votes
1answer
27 views

Safe level of chlorine in water [on hold]

Chlorine is usually mixed in water to make it safe for consumption. What is a safe quantity of chlorine that can be consumed? What are the side effects of chlorine and does this include hair loss? ...
-6
votes
0answers
41 views

Frequent male nocturnal emission [on hold]

What would cause someone to have these occur frequently?

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