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0answers
18 views

How many kingdoms are there actually?

I am wanting to learn (memorise) some of the tree of life; the classification of organisms. So I have come across a lot of kingdoms in my research. Basically, I don’t want to waste my time learning ...
-1
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0answers
16 views

Do we dream with antipsychotics?

Antipsychotics are known to remove the hallucinations from our brain. But i release that while taking an antipsychotic, i don’t really dream... is that true ? Is it possble to not have paradoxical ...
-2
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0answers
18 views

Is the Na-K-ATPases always active?

Is the Na-K-ATPases always active, also during an action potential, or does it close during an action potential?
-2
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0answers
15 views

How are parts of a virus used in creating a vaccine?

What is the process in using only parts of viruses such as proteins which can be recognized by the immune system such as in the case of the spike protein for Mers-CoV? I understand it is a method of ...
-2
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0answers
10 views

What are the mechanisms of tumor resistance to anti-neoplastic agents?

In addition to pumping out the drug, accumulating mutations and then evolving, e
0
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1answer
32 views

The eukaryotic rDNA encodes for what?

The Wikipedia page for rDNA says "Ribosomal DNA (rDNA) is a DNA sequence that codes for ribosomal RNA" Also, the figure next to it says "The gene segment of eukaryotic rDNA contains 18S, 5.8S, and 28S ...
-1
votes
1answer
32 views

Is the backward positioning of photoreceptors bad design?

(Several questions have been asked about this topic but most are quite old and there has been at least one study since then that has attempted to answer this in a new way) Since photoreceptors are ...
-5
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1answer
37 views

DIY Biohacking?

I am a computer programmer, and while writing code is great for solving certain problems, programs easily become obsolete, and I want my input to humanity knowledge-base to be permanent. It might be a ...
2
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0answers
24 views

Why does constant current in electrophoresis mean that the molecule moves at the same rate?

Two part question: Part 1: I have always learned that when running a SDS-PAGE current is what decideds how fast the macro molecules migrate. However, if the force excerted on a molecule is equal ...
-1
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0answers
18 views

What is a “putative plasmid”? Why wouldn't a genome sequence resolve if it is a plasmid or not?

Scitech Daily's Researchers Analyze Nasty Species of Bacteria That Has Colonized Space Station’s Water Dispenser says: The researchers conclude that the two bacterial species living within the ...
-1
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0answers
13 views

Wood frog freezing/thawing cycle

Wood frogs are known for their ability to freeze. I understand that this is because ice crystals formation is prevented chemically, so the body won't get damaged by growing ice crystals. I assume ...
-3
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1answer
46 views

Is it possible to artificially induce a 40°C fever in a controlled and safe manner?

In search for any possible new treatments for COVID-19, I am of the understanding that the SARS-nCoV-2 virus may suffer deterioration at high temperatures and high humidity, to perhaps weaken it ...
0
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0answers
29 views

Research on chicken that cannot feel pain

In was having a conversation about the ethics of vegetarianism, and if it is right to cause pain to other animals. It is then that I stumbled upon the question, that if, just the way chicken and many ...
0
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0answers
12 views

In the PR segment of an ECG, how come there's no current flowing?

I don't really know how to phrase the question, but to put it as clearly as I can, I don't get why it is the P wave "flattens down" when the atria have completely depolarized. I get that the charge is ...
18
votes
9answers
4k views

If plants and trees *want* carbon dioxide, why is car traffic something bad?

This is going to sound really stupid or as a joke, but... Ever since I was a little kid, I have been confused about the following: Humans need air/oxygen to breathe in order to live. Plants/trees/...
0
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1answer
24 views

Cell Membrane : Channel Proteins

The integral membrane protein and the protein channel is a part of the cell membrane? Is this correct or not?
0
votes
1answer
36 views

How do big cats perceive objects, specifically vehicles?

Right so we have been on safari in South Africa recently and before encountering big cats (lions) we have been told to hold still and not reach out beyond the boundaries of our safari vehicle because ...
-1
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0answers
52 views

Is it safe to use Oxygen Concentrator, previously used in a hospital and sold over the Internet? [closed]

hundreds of used Oxygen Concentrators are offered for sale on the Internet Since part of the machine are metal cylinders filled with zeolite and air is pumped through these cylinders, I would like ...
1
vote
0answers
22 views

What are good techniques for determining direct maps of proteins?

I am looking for which techniques to explore to determine electron density maps (or Fourier maps) for a protein (possibly using an assumed model). In particular, I want to avoid techniques that ...
1
vote
0answers
21 views

When does the vertebral column finish chondrifying and begin to ossify?

I have read many articles on vertebral column development in embryos on the internet. Different articles give different time periods for the end of chondrification of the vertebral column and the ...
2
votes
1answer
37 views

What is this sea shell?

Found in Belgrade, possibly carried back from the Mediterranean or Aegean coast.
0
votes
1answer
38 views

Average Nucleus size of human skeletal muscle cell

I’ve been struggling the last couple of days to find reliable data on the average nucleus size of a human skeletal muscle cell. If I deduce it from pictures it should be in the range of 20 micrometers ...
-1
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0answers
27 views

Hand washing effectiveness in zoonosis prevention

It seems to be a general recommendation for pet owners to wash their hands after treating the animal (for example https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4500695/ and https://www.ncbi.nlm.nih.gov/...
0
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0answers
14 views

Why does polyploidy occur during failure of cytokinesis and not during failure of karyokinesis?

Polyploidy is increase by a whole set of chormosomes, Cytokinesis is the process of splitting the cell cytoplasm and polyploidy is the splitting of the nuclear mass. Now I ask why polyploidy occurs ...
0
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0answers
16 views

sperm reaction of virus infected

we know when a human body cell infected by a virus , create interferon 1 to call other cells that surrounded it , but red blood cells couldn't do this because they loose their nuclear and other ...
15
votes
1answer
861 views

Inability of vultures to digest diclofenac

The population of Indian vultures has been rapidly declining since 2003. This is attributed to the diclofenac present in the carcasses which the vultures eat. Vultures seem to digest all sorts of food ...
0
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0answers
23 views

Will a less favorable allele's frequency go to 0?

For example, a pond is dark in color. There are two alleles. The dark color allele is dominant over the light color one. Let's assume that the relative fitness of both the homozygous dominant and ...
-1
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0answers
27 views

Monophyly, paraphyly and polyphyly in humans

A monophyletic group is a group or organisms that consists of all the descendants of a common ancestor. Three examples: 1. Rosales (an angiosperm order) (it includes roses, hemp, apples, pears, elms, ...
5
votes
0answers
41 views

Are blue feathers better insulators?

I recently found an article talking about the colors of bird feathers. https://www.smithsonianmag.com/science-nature/why-are-some-feathers-blue-100492890/ Apparently, unlike other colors, where ...
0
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0answers
21 views

Are the 70s ribosomes in archaea similar to the 80s ribosomes in eukarya

I understand that archaea are closer to eukarya than they are to bacteria (especially in the proteins of their RNA polymerase) but are they also similar in their ribosomes? (despite having different s ...
-1
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0answers
33 views

Structure inside Virus

I always wondered how do scientist determine internal structure of a virus or prion. A virus itself is couple of nm of size, how do they dissect it, and know what DNA, RNA or lipid lie inside it? Can ...
0
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2answers
29 views

What is allosteric regulation?

I've found multiple definitions for allosteric regulation and struggling to understand which one is correct. My text book says: 'Another way of regulating enzyme activity is through allosteric ...
0
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0answers
33 views

Paper shows 2 hours of high humidity and hot temperatures kills corona virus, does this stop the spread of the virus?

I found this paper (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2863430/) which says these corona virus strains live for months at 4 degrees C, 20% relative humidity. But at 40 degrees C and 80% ...
1
vote
1answer
22 views

In the notch signaling pathway, what is Fringe activating?

Take a look at the notch signaling pathway in human from KEGG : https://www.genome.jp/kegg-bin/show_pathway?hsa04330 I want to know what is Fringe activating. It is not pointing to another gene or ...
2
votes
0answers
29 views

Does photosynthesis begin instantly when a plant is exposed to light?

I'm curious to know if the process of photosynthesis has a "ramp-up" time to become useful to a plant, or if it begins instantaneously when the plant is exposed to light after a period of darkness. ...
9
votes
2answers
2k views

What is “irrational” drug/molecule design?

Both the papers "Directed evolution: the 'rational' basis for 'irrational' design" by Tobin et al. and "Rational and 'Irrational' Design of Proteins and Their Use in Biotechnology" by Nixon et al. ...
1
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0answers
22 views

Is it possible for an immune host to be reinfected and show symptom before swift recovery?

For example, let's say the pathogen is a virus, and the host was infected once but recovered purely on its own and thus retained a highly effective adapted immunity. However, if we IV inject the the ...
0
votes
1answer
23 views

Calculating Rate of Growth without a Population

Lets say that by studying individuals of a rare species, you have determined that species gestation period, age of sexual maturity, average time between pregnancies, maximum lifespan, and average ...
1
vote
1answer
38 views

A question about dna triplex

Short DNA triplex strands have been identified in various organsims. But, would injecting a single strand of DNA or RNA (with its bases complementary to the bases of DNA found in the major groove of a ...
-2
votes
1answer
54 views

Genes associated with human female breast size

What are the genes associated with female breast size and natural variation thereof in human beings?
-1
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0answers
17 views

Why the body uses Myosin for movement and Kinesin for transport? [closed]

I'm looking to summarize why most cells evolved to use Myosin (and Aktin) for movement and Kinesin (and microtubulli) for transport.
0
votes
0answers
13 views

can anybody help me to identify Divergent gene pair from a list of human genes, is there is any connection between Transcription Start Site(TSS)

I am trying to build a computational model to predict the divergent and convergent gene pair from a set of genes. For that, I want to categorize the gene pairs based on gene orientation. From a paper, ...
0
votes
0answers
5 views

What is the plant genus or species which is most durable to darkness? [migrated]

I would like to buy indoor plants to put them in a room which usually have a very low amount of natural and/or artificial light. I understand that such indoor plants are usually low-height (up to 1 ...
0
votes
0answers
28 views

Salt water swish for dental health [duplicate]

I was wondering as to why warm water is told for salt water gargle and not cold water, does warm water has more therapeutic effect? Also does salt really work, excess salty water might kill bacteria ...
-1
votes
0answers
23 views

Clarifications on secondary structure of proteins

$\beta$- structures in proteins are usually named as $\beta$ - sheets, $\beta$-turn, $\beta$-bridge. What are the differences among them? What are the regions called $\alpha$, $\gamma$, $\delta$, $\...
0
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0answers
31 views

Non specific band in EMSA gel?

I am doing EMSA with Thermo LightShift Kit. I have a 150 bp biotin labeled probe which has been PCR amplified, gel eluted and sequenced. When I load samples on 5% native polyacrylamide gel, I see a ...
0
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0answers
13 views

will meat/chicken protein mix with water while cooking?

I'm interested to know, if we cook meat/chicken in water, will some of it's pretein mix with water? Is this amount considerable and should we eat this water for it's pretein or not?
1
vote
0answers
43 views

What are the differences between internal organs between sub-saharan Africans and Northern Europeans

Lets take as examples a typical Norwegian and a typical Nigerian. In terms of human anatonomy the outer differences are more obvious e.g. (on average) White skin vs dark skin Pointy nose vs broad ...
0
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0answers
22 views

What percent of mucle growth is possible without steroids consumption?

I am interested to know, if someone does bodybuilding exercises with good rest, enough protein, high presure workout, etc, but without consuming any steroids, how much of muscle gorwth is possible for ...
0
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0answers
10 views

Can the human body store protein?

I am interested to know if a human body can store protein. Absolutely for the bodybuilders, does it really matter if they divide their protein consumption during the day or eat all of it in one meal ...

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