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7 views

Best human tissues for observing stained phases of mitosis?

Hobby level human mitosis observation. What human tissues could I pull from myself to prepare a chromosome-stained slide to observe by brightfield microscopy? The main criteria I am looking for are as ...
-1
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0answers
12 views

The book I am referring states "Nucleus as a cell organelle was first described by Robert Brown" [closed]

Since the book states described, who discovered the nucleus of a cell? Why isn't he or she mentioned in textbooks?
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0answers
9 views

Transformation and PCR in molecular cloning

After obtaining the recombinant DNA, it is common to transform into E. coli to screen for recombinant DNA and amplify it. But I would like to ask can we amplify it using PCR? I think there will be 3 ...
0
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1answer
29 views

What is the effect of anti-fungal soap?

As I understand, most popular anti fungal soap/shampoo has Ketoconazole as an active ingredient. Ketoconazole stops the growth of fungi, but as it does not kill it, but halts division, how can soap/...
2
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0answers
22 views

Do spike-protein-based vaccines undermine the DNA repair system?

I ain't no biologist but I came across this paper recently and tried to understand it. My question is: Is it a correct takeaway that vaccines that are based on the full-length spike-protein such as ...
-1
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1answer
29 views

Gene Sequencing

The human genome project took an effort of around 15 years, billions of dollars and thousands of scientists working together. So how is that the genetic sequencing of covid variants could be done at ...
-1
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1answer
22 views

In peas, the allele for tall plants T is dominant over the allele for dwarf plants t [closed]

In peas, the allele for tall plants T is dominant over the allele for dwarf plants t. A homozygous tall plant is bred with a homozygous dwarf plant. Complete the cross. What is the genotypic ratio, ...
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0answers
20 views

How does RMSD between proteins of different sequence length work?

Given two protein structures from the PDB, sometimes it's useful to compute the structural similarity between them. Each of these PDB structures are not necessarily oriented to one another. For this ...
-2
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0answers
18 views

Why do we put plant in sunlight for 6 hours in experiment to show significance of chlorophyll for photosynthesis?

In the experiment to show the significance of chlorophyll for photosynthesis we put the plant in sunlight for 6 hours. But why do we put it there for 6hours. I think that it is a large period of time ...
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0answers
19 views

Why would it be unsafe to eat spoiled, but heated, food, but safe to drink spoiled, but chlorine purified water?

To my understanding, spoiled food is not supposed to be consumed even after cooking it, since the heat may eradicate germs, but their toxines may be heat-resistant and thus still active. However, ...
-1
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0answers
20 views

Children born to older mothers with lower BMI

Is there a biological explanation when the trend shows lower BMI among children born to older mothers. When mother has children when she is 40 or 50 years ?
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0answers
20 views

Is it possible to receive the empty viral capsids? [closed]

Can the capsids of a virus be freed from the DNA strand of the virus and separate them from the DNA particles in water?
0
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0answers
13 views

What is the definiton of repertoire shift in B cells?

I am new to biology and trying to understand this term. Couldn't find a comprehensive defintion. Thank you
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0answers
12 views

Genotypic and Allelic frequency of a sex-linked trait in a population

A small community is made up of 400 people (220 females, 180 males). 10 females are colour blind while 40 males are colour blind. The rest have normal vision. Although normal vision is controlled by a ...
2
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0answers
41 views

Occurrence of the theoretical thymine enol::guanine base pair in DNA

DNA polymerase has a proofreading exonuclease activity that can remove incorrect tautomers in the DNA template or incoming base. In theory the enol form of thymine can form three hydrogen bonds with ...
7
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0answers
419 views

What is, (and what isn't) "kinetic replication" as it applies to molecules and to living organisms?

CNN's World's first living robots can now reproduce, scientists say describes "xenobots"; clusters of stem cells that move around and by this motion occasionally push enough free stem cells ...
2
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0answers
34 views

What are marine fungi like?

Particularly, what is their mycelium like and where exactly do they grow it? I imagine that their spores travel though water same as terrestrial fungi travel through air until they stumble upon solid ...
0
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0answers
25 views

What happens if the Krebs cycle doesn’t occur [closed]

Suppose that there is a mutation in a single-celled organism where the Krebs cycle (TCA/Citric Acid Cycle) doesn't happen. What would be the consequences for that organism? How would their metabolism ...
-2
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0answers
23 views

Ritalin/Concerta/Methylphenidate is an amphetamine? [closed]

FIDE says here: The most relevant banned substances for chess are: • Amphetamines – e.g. Adderall, Ritalin (...) Image: I think either Ritalin should be in a separate category called ...
1
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0answers
51 views

Could Omicron be the variant of a variant?

I read that the newly discovered variant of Covid-19 has a higher number of mutations than the other variants. Isn't it more likely that it is the variant of a variant? It would be absolutely normal, ...
-1
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0answers
45 views

Is it possible to tell if a person is lying or not? [closed]

I was wondering if it is possible to actually tell if a person is telling the truth or not. Is it possible?
14
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1answer
2k views

Was the Harcourt COVID-19 isolate paper ever published?

One very interesting paper concerning COVID-19 was the paper describing the first isolation of the virus by Harcourt et al. However, this paper as far as I can tell was only published as a preprint in ...
-6
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0answers
32 views

Why is so much effort put into trying to use false equivalency to censor the fact that mrna vaccines by Pfizer were developed using fetus tissue? [closed]

As they say rna is not dna. Likewise rna viruses are not dna viruses or bacterial infections. Humans have had great success with vaccination against dna viruses and bacterial infections. Some of these ...
1
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0answers
43 views

Evolutionary pressure of vaccines towards a virus

I am trying to understand the following quote from one of the Twitter threads : A change in the spike protein which allows the coronavirus to enter and infect human cells that is radical enough to ...
-4
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0answers
21 views

Is Glucose or any simple sugar absorption occur in Stomach? [closed]

NCERT Mention Simple sugar is absorbed in Stomach
0
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0answers
38 views

Why are apes so poorly adapted for walking upright?

Non-human apes are quite poorly adapted for walking upright, in terms of their anatomy. I have found many sources that explain how their anatomy is so unsuitable for an upright life, yet none have ...
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0answers
44 views

A question on evolutionary biology

This is a question from a quiz I was attempting: Firstly, I believe that the first blank must be filled by 'large' or at least 'moderate'. We essentially share 50%of our DNA with yeast, 60% with ...
-1
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0answers
31 views

Are the “racial phenotypes” still real? [duplicate]

Are the racial phenotypes, which are based on the characteristics of physical appearance, still real and useful concept in biology and anthropology of today's academia. For example there's a website ...
2
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1answer
57 views

Could Sars-CoV-2 vaccines make the immune response less effective against new variants?

Some viral diseases (e.g. influenza and dengue fever) are thought to exhibit original antigenic sin. The immune system remembers viruses that it has been previously exposed to, allowing the body to ...
-3
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0answers
44 views

How does respiration differ between fish and mammals [closed]

A friend posed this question today, and after extensive research on the internet, we couldn't find anything. How would you go about tackling this problem if such a question were posed to you? NB. This ...
1
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1answer
75 views

Do mutations in a fundamental structure of a virus [Omicron Variant] make it more transmissible?

I am not a microbiologist, nor a virologist so I had a question - in the new Omicron virus variant, a large number of mutations were reported for the protein spike. From my naïve understanding, the ...
-2
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0answers
48 views

What kind of insect or bug is this?

These insects all over my floor, on my bed, and on the top of my cupboard. They are in the shape of a seed but are really tiny. The exterior is hard and they can fly and also they spider like legs but ...
1
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0answers
61 views

Can a less fit strain of a virus impose over a fitter one? [closed]

According to Dominant Delta Variant may mutate itself into destruction and many others online media reporting the same, The Delta variant in Japan was highly transmissible and keeping other variants ...
-1
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0answers
44 views

Why are bacteria/viruses not a common issue to plants? [closed]

I like growing a few plants in my living room. In some videos I watched about gardening, it's recommended to cut the plant for various reasons. Very often, it is recommended to sterilize the knife. ...
8
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1answer
2k views

Can the SARS‑CoV‑2 virus mutate in people who have been fully vaccinated?

I am curious to know if the original SARS‑CoV‑2 virus, or any of its variants, can mutate in people who have been fully vaccinated. I am referring to those people who have received all the recommended ...
0
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0answers
40 views

What is the upper limit for 'active' vaccinations

As far as I know the effect of vaccines is caused mainly by creating Memory Cells specific to a single pathogen. As there is obviously a lower limit of memory cells needed for immunity ( at least one),...
-4
votes
1answer
46 views

What is the probability for an offspring to inherit schizophrenia? [closed]

If an European male (i.e. white) is diagnosed with schizophrenia, but an European female (also white) 2-3 years younger than the male is healthy, what is the probability that their first child will: a)...
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0answers
28 views

Why isolated chlorophyl emits red light?

If we observe isolated chlorophyl solution with UV light, chlorophyl is seen as red. explanation suggests that when specific atom of chlorophyl absorbs UV light, atom gets excited and in a short time ...
0
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2answers
59 views

Where can I get info about A. thaliana proteins' locations?

I have a list of A. thaliana proteins and I'd like to know their location in the cell. I've found SUBA but they seem not to share their dataset and only allow queries through their website. It's ...
3
votes
1answer
124 views

What animal has the strongest immune system?

I'm wondering what animal has the strongest immune system. It can be defined as the most evolved immune system or the immune system that can eliminate or tolerate most number of (different) viruses/...
-3
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0answers
19 views

What is known about how stress produces exhaustion on the cellular level? [closed]

What occurs on the cellular level when someone is under heavy stress such that the body becomes fatigued and must recuperate for a period?
-3
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0answers
26 views

Real Action Potential vs Schematic Action Potential

We came across this image today. Why in actual oscilloscopes is there a secondary peak just above the resting potential? And why does hyper polarisation not cause the voltage to drop below the resting ...
3
votes
1answer
84 views

Are snake capable of love? (social bond in a male/female couple)

I'm wondering whether it has been noticed that some species of snake form male/female couples for life (or at least multiple reproduction cycles) like other types of animals do (penguins come to mind)....
1
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1answer
39 views

What is static compliance?

If static compliance is change in volume with respect to change in transpulmonary pressure, when there is no gas flow. My question is; if there is no gas flow, how would volume Change?
3
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1answer
44 views

Is this a Northern Black Widow?

I’m in Florida and my 5 year old spotted a spider on an old watering pale toy. It looks like a widow in shape and color, and has red spots down it’s back. Most black widows here don’t have anything on ...
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0answers
13 views

Conclusions from a genetic variant associated with two diseases [closed]

Say you have a genetic/genomic variation, e.g. a SNP or a CNV, that has been found, through GWAS, to be associated with two diseases, A and B. If you already knew that the variation directly causes ...
-3
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1answer
51 views

Where could I find biology-specialized transcription services for my conference? [closed]

I'm a conference organizer for various conferences in the field of biology. Just recently, I stumbled upon this Nature article: https://www.nature.com/articles/d41586-021-03487-2 and I have ...
0
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0answers
34 views

What plant species generate the highest amount of bioelectricity?

I just want to ask which plant species produces a high amount of electricity. I'm very confused with the units that's why I don't know which species produce the highest amount of electricity. Also, ...
22
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3answers
6k views

Effects of mRNA vaccines on human body processes

I would like to understand the effect of an mRNA vaccine on more complex processes in the human body. To what extent does this "artificial", external addition of mRNA interfere with the body'...
1
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0answers
15 views

What does equilibrium curve signify?

While learning about gas exchange, I came across the haldane effect. Then i came across the CO2 -dissociation curve. Apparently the curves are "equilibrium curves". Does it mean that the ...

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