0
votes
0answers
6 views

Colormetric assay for a phenol product?

I am working on an assay for phenol products created by a colony of bacteria. I have searched up a paper that involves gibbs reageant but the protocol is kind of unclear. Does any of you know where I ...
11
votes
1answer
94 views

Identify ~6-7mm long green creature

Here is the creature I found on the glass lid of my light bulb. I guess they are attracted to light as they all concentrate on the light source. I live in Hong Kong. The brown things aren't moving ...
0
votes
0answers
15 views

How much would a Gigantopithecus be able to lift?

How much weight would a Gigantopithecus blacki be able to lift? Size comparison of G. blacki vs human: https://en.wikipedia.org/wiki/Gigantopithecus#/media/File:Gigantopithecus_v_human_v1.svg Its ...
1
vote
1answer
18 views

Why is the pituitary gland located in the brain instead of elsewhere?

Why is the pituitary gland located in the brain in humans instead of elsewhere? Why would this be adaptive during our evolutionary history?
5
votes
1answer
57 views

Are low-intensity radio-waves carcinogenic?

A recent review article, Oxidative mechanisms of biological activity of low-intensity radiofrequency radiation reached a surprising conclusion our analysis demonstrates that low-intensity RFR ...
0
votes
0answers
15 views

What's it like to be a synthetic biologist? [on hold]

I find the field of synthetic biology very interesting and I would like to know what people in the field work on. Where do you work and what do you do there? What did you study to become a synthetic ...
0
votes
0answers
10 views

What is this flower?

I was in Germany recently, and I saw again a flower that I'd only ever encountered before at Meijer Gardens. It's interesting to me because I'd never seen a flower with color variation in only the ...
2
votes
1answer
34 views

Can axons act as receptors?

In all histology books, it is stated that all sensory nerve endings (receptors) are made of dendrites which conduct sensation from environment to body but it doesn't seem to be true. For example, the ...
2
votes
1answer
45 views

Is nuclear DNA immuno-privileged?

It is well known that if DNA occurs in the cytoplasm of eukaryotic cells, an immune response may be triggered through a myriad of DNA receptors and pathways as part of the immuno response. Yet, ...
1
vote
0answers
5 views

Two different Leucochloridium infected snails - different species?

In the last three days, I have found two snails infected by some species of Leucochloridium. I found them in my garden in the south-west of Sweden. Now I'm wondering if they are the same species or ...
1
vote
1answer
21 views

Bernoulli’s Principle in the Cardiovascular System

Below are graphs which illustrate the cross-sectional area, velocity, and fluid pressure through each vascular segment of the cardiovascular system. It makes sense that velocity and cross-sectional ...
1
vote
1answer
12 views

How to validate the use of an anti-virus monoclonal antibody in IHC by spiking a fresh organ with infected cultured cells?

I have assessed the specificity of a particular monoclonal antibody against a virus by immunofluorescence. I'd like to further validate it by testing it by IHC. Therefore I'd like to infect cells in ...
0
votes
1answer
24 views

What is the surface area of the vitreous humour in contact with aqueous humour?

This is a question regarding the anatomy of the human eye, however for my purposes medium sized mammals should do. I am interested in estimating the surface area of the hyaloid membrane of the ...
3
votes
3answers
76 views

What is a good source that will help me classify protists?

I am a 15 year old that enjoys looking at the micro world. The only issue that I have is that I can't find a good online source that will help me classify the name of the micro organism that I'm ...
0
votes
0answers
13 views

What is the effect of the RNA 2' OH group on its structure and stability? [duplicate]

I've read that the 2'-hydroxyl group plays "fundamental roles" in both the structure and the function of RNA, and that it is a major difference between RNA and DNA. I would like to know more ...
14
votes
3answers
257 views

What are the effects of long-term liquid breathing?

I just saw a recent Physics question that mentioned liquid breathing (which I had never heard of before) and I started to wonder about its long-term effects. Let's imagine a person underwent liquid ...
2
votes
1answer
42 views

Why does a wound itch while it's healing?

During healing of wound (almost in final stage) it begins to itch a lot around wound. I wondering what the reason for this is?
1
vote
1answer
64 views

Why are nitrogenous bases of DNA hydrophobic if they can hydrogen bond?

Why are nitrogenous bases of DNA hydrophobic if they can hydrogen bond? Is it that they are only relatively hydrophobic? This forum explains it but does not give an example of the structure.
2
votes
1answer
19 views

Do the enzymes and compounds in saliva help with stain removal?

Does spitting on stains help with removal? Saliva is high in amylase that should help with the breakdown of protein rich stains like blood and semen. It also contains antimicrobial enzymes and ...
-3
votes
0answers
29 views

What would be a Latin (Linnean) alternative for “The Talking Ape” instead of Homo Sapien (The Wise Man)? [on hold]

I would like to start a change.org petition to downgrade the name of our species from homo sapien, the wise man, to something that is more appropriate, like the talking ape. Reason: Not only is ...
1
vote
0answers
10 views

About binary fission in amoeba [on hold]

We know that amoeba reproduces by binary fission. Then does it mean that it never dies but keeps regenerating? In other words and more generally, does reproduction by fission by unicellular organisms ...
3
votes
1answer
55 views

Is there a schema for how human behavior is genetically determined?

It seem one can distinguish three different kinds of genetic determinism of common patterns of human behavior: behavior that is directly wired into our nervous system, e.g. face-related mirror ...
8
votes
1answer
70 views

Does your iris color have an effect on your vision?

I've always wondered if having different iris colors, (eye colors) may have any advantages or disadvantages on ones vision. Specifically regarding the effects of light. Personally, I have troubles ...
0
votes
2answers
59 views

What is the difference between a graded potential and an action potential?

I was under the impression the only signals neurons send using changes in membrane potential are action potentials. But my biology professor showed us diagrams of graded potentials and action ...
1
vote
2answers
34 views

What would happen if brain neurons did not reduce their sensitivity to neurotransmitters after prolonged exposure?

From my understanding, neurons decrease their sensitivity to neurotransmitters by reducing the amount of receptors on the cell membrane in response to sustained neurotransmitter activity. One ...
0
votes
2answers
76 views

What is the DNA Sequence for an apple?

The title says it all. I'm just curious. I read that scientists mapped the genome for Malus Domestica, but I can't find a sequence anywhere.If this is a stupid question, I would appreciate if you tell ...
8
votes
3answers
614 views

What exactly does adaptive mean?

This is a quote from Dey et al 2014: Hatching asynchrony is thought to be adaptive because... What exactly does adaptive mean here? Does it mean hatching asynchrony has fitness benefits? Or does ...
5
votes
2answers
3k views

Why do kefir grains stop growing in soy milk?

Kefir is a fermented milk drink made with kefir grains. It usually is prepared by inoculating cow, goat or sheep milk with kefir grains. I would like to prepare the drink with soy milk, which worked ...
5
votes
4answers
66 views

Is Insulin-Glucose dynamic Lotka-Volterra?

From Wikipedia: The Lotka–Volterra equations, also known as the predator–prey equations, are a pair of first-order, non-linear, differential equations frequently used to describe the dynamics of ...
1
vote
0answers
10 views

Through which mechanisms did the Drosophila Histone Cluster evolve?

The Drosophila Histone Cluster is a gene cluster that contains more than a hundred copies of a sequence that encodes several histone proteins. These copies are very similar. My question is what ...
0
votes
0answers
17 views

Nagalase testing any good?

Is Nagalase testing good to detect if something is wrong in the body (ex: cancer)? The next problem I assume would be to know what/where the problem is. To put it an other way: If I understand ...
-1
votes
0answers
24 views

Eye Accomodation [on hold]

I tried to make a quick search in Google without too much luck, so i stumbled upon here. I am able to accommodate my eyes at will, even though with some constraints: -Accomodation works better for ...
0
votes
0answers
8 views

Why are porphyrins colored when porphyrinogens are colorless? [migrated]

In Haem synthesis porphyrinogens are colorless but on their oxidation (removing 6 hydrogen atoms) they become colored porphyrins ,also, is red the only color the turn into or it depends ?
8
votes
1answer
61 views

Can we change our dopamine baseline levels?

Can we change our dopamine baseline levels? High dopamine levels improve alertness, problem solving, but may also cause anxiety and aggression. I've read that smiling and laughing, eating certain ...
7
votes
3answers
245 views

Why don't phospholipid bilayers dissolve?

I just started learning about the structure and composition of cell's membrane and there is something that I fail to understand. The membrane is composed of a phospholipid bilayer. The phospholipid ...
1
vote
1answer
102 views

Which of these methods is both effective and reliable in elongate muscle and tendon for use in humans: growth factors or stem cell technology

Which method is it the most effective, but also the most reliable for elongating muscle and tendons for clinical trial; using modern growth factor technology or using modern stem cell technology? ...
5
votes
1answer
93 views

Can someone tell me the species of this lizard?

It's a green lizard with a silver tail, and it has pretty, bluish eyes. I saw it today, July 26th, trying to get some shade on a hot, sunny day (32 degrees) at around 18:00 in Austin, TX USA. It's ...
7
votes
1answer
59 views

What bacteria do unborn babies contain?

This Scientific American article states that "[human] infestation [by bacteria] begins at birth". This would suggest that unborn babies are free from any bacteria. However, if the mother catches a ...
-1
votes
1answer
47 views

Can plants feel pain? [on hold]

I was wondering whether plants could feel pain, for example, does grass feel pain when you mow the lawn? Or do the plants and trees that grow vegetables and fruits feel pain when you harvest them? ...
2
votes
1answer
59 views

Which process is right to describe V(D)J recombination? RAG-1 and RSS recurring process

I'm studying V(D)J recombination. I think I have two incompatible books about explantaion of the process. Which is right? In Molecular Biology of the Cell 5th Ed., firstly RAG (-1?) combines to RSSs ...
1
vote
0answers
21 views

Biological implementation of convolutional neural networks

In computer science, 'convolutional neural networks' are used, that are meant to be inspired by biological network structures like found in the human brain visual cortex. In the computer ...
4
votes
1answer
39 views

What is the relationship between W, X, Y and P, M retinal ganglion cells?

In Guyton and Hall Textbook of Medical Physiology (12e) the retinal ganglion cells are classified into W, X, and Y types. However in Gray's Anatomy (40e) they are classified into Midget and Parasol ...
5
votes
3answers
74 views

Why are sight and sound prerequisites for intelligence?

Edward O. Wilson, in The Diversity of Life wrote (emphasis mine): Ninety-nine percent of the animals find their way by chemical trails. […] Animals are masters of this chemical channel, ...
12
votes
4answers
5k views

Why we have no enzyme to digest cellulose?

As we know, cellulose is the most abundant polysaccharide in nature. Why don't we have any enzyme to digest cellulose?
0
votes
1answer
22 views

How does the structure of the pancreatic acinar cell relates to its function?

So the pancreatic acinar cell synthesizes, stores and secretes digestive enzyme precursors called zymogens e.g. pepsinogen. The structure of the acinar cell shows that there is an apical and basal ...
1
vote
1answer
12 views

What is the spacing between stop codon and transcription terminator?

When one tries to express a protein from a synthetic plasmid in E. coli, how many base pairs should there be between stop codon and the transcription terminator site?
2
votes
0answers
22 views

How does being afraid or nervous affect mental performance?

It's known that when somebody is not relaxed (nervous,worried....) , they can't concentrate , what exactly in being nervous is the problem?
0
votes
0answers
14 views

Why we see a reddish vision in dark room after seeing a bright light?

When you enter a dark room after seeing sunlight or other bright light, you see a reddish speck of light hovering around your vision. This vision generally disappears after a few minutes. Why this ...
1
vote
1answer
29 views

What is variation in Speciation

I read a lot about speciation. To my knowledge, A species is often defined as a group of individuals that actually or potentially interbreed in nature and produce fertile offspring. Speciation is a ...
13
votes
1answer
15k views

At what age do babies begin to synthesize their own antibodies?

When babies are first born, they receive their antibodies from their mother (I assume because they do not yet have the capacity to synthesize their own). So my question is, at what age do babies ...

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