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Occurrence of non-functional, “spontaneous”, amino acid degradation?

Animals tend to have to consume proteins continuously. Amino acids are often degraded by synthesis of other compounds, including glucose and cellular respiration, catecholamines, etc, accounting for ...
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0answers
8 views

Can catecholamines degrade back into tyrosine, or, is synthesis irreversible? (in human body)

Catecholamines like dopamine, noradrenaline and adrenaline are broken down with enzymes that catalyze the reaction. Can they degrade back into tyrosine (a conditionally essential amino acid), or is ...
-5
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0answers
14 views

Could COVID-19 have been created in a lab using the data gained from the reconstructed 1918 Spanish Flu virus? [closed]

The 1918 Spanish Flu Pandemic virus (Influenza A, H1N1) was reconstructed in a CDC laboratory back in 2005. The CDC then published how their researchers were able to accomplish this and the article ...
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1answer
13 views

question about cat's claws?

ok so I went and read this website: https://www.yourpetsbestfriend.com/your_pets_best_friend/2010/03/why-cats-sharpen-their-claws.html So I have some questions to ask: how many times does a cat has ...
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0answers
7 views

Does a virus survives longer on a dirty surface?

With the current COVID-19 situation, there are many conflicting information about virus survival on various surfaces. My layman understanding of the replication of a virus (or specifically the COVID-...
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0answers
17 views

Question regarding a virus injecting its genetic material into a host cell

In Mukherjee's The Emperor of All Maladies, he writes "viruses infect cells, produce more viruses, and infect more cells, but they do not directly affect the genetic makeup, the DNA of the cell." He ...
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1answer
14 views

What are these flowers on Kerguelen?

What are these plants, which resemble short pink sunflowers, in this photograph from Kerguelen island?
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0answers
13 views

Any phyla in Animalia that does ammonia assimilation?

A key step in nitrogen metabolism is the initial assimilation of inorganic ammonia into amino acids. Are there phyla within Animalia that do assimilation of ammonium (NH4+)? Phyla with symbionts from ...
2
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0answers
25 views

How does SARS-CoV-2 spread from cell to cell in the lung? [closed]

This virus exits the cell using exocytosis after assembling golgi vesicles which contain the virus by fusing with the cell membrane. In the case of infected pneumocytes, I imagine that the virus ...
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0answers
15 views

Can someone help me fill this table out involving the Cell cycle stages?

Please fill out this table its the end of term for me today. I have tried watching videos emailing my teacher and it doesn't make sense
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0answers
20 views

Do animals suffer in agony or pain the same way like homo sapiens suffer?

When an animal suffer in agony or pain, do they feel it the same way as homo sapiens or human beings? I saw a documentary where it showed that while the child cattle were being slaughtered mother ...
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0answers
13 views

Based on morphology alone, what type of claw does the Tyrannosaur have?

I understand that the exact use of Tyrannosaur Rex's claw is a mystery, or at least debated. I also understand that claws can be used for a variety of different purposes, selective pressure adapts ...
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0answers
25 views

Why is ammonia excreted? [duplicate]

Not counting CO2 from the lungs or water, humans excrete, by mass, as much ammonia as all other elements or substances, in the form of urea. Why is ammonia excreted? My best guess is that non-...
2
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1answer
20 views

Spider identification (Caribbean)

I live in the Caribbean (Puerto Rico) and found this spider in my garage. Is it venomous? It measures about 8 inches as a whole.
1
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0answers
6 views

What causes the overactivity of collagen production and expression in the cells of the nail bed/ nail matrix after some traumata?

What is the cellular mechanism of traumatic(sterile) onychodystrophy(hypertrophy)? I.e one hits his toenail and has it removed twice( once after the first trauma and then 3 years after the first ...
-2
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0answers
20 views

Without real air could we make prototype air? [closed]

Could this be true and would we be able to make fake air?
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0answers
15 views

does a cats claws becomes less sharper every time they use it?

OK so sometimes cats scratches tree in order to keep their claws sharp so is it true that every time a cat or any other feline uses it claw, there claws become less sharper
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0answers
15 views

Once a virus has attached to the host cell, how does it break the cell membrane of the host cell?

The virus has no machinery to produce proteases when it is outside the cell, then how does produce the proteases required to lyse the cell membrane of the host cell?
13
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1answer
3k views

Antibacterial soap impacts on septic system?

What impacts do antibacterial soaps have on septic systems? I know that septic systems rely heavily on bacteria (especially regarding the breakdown of wastes by bacteria), so it seems as though ...
1
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1answer
29 views

Can far-UVC light be safely used as germicide? (help understanding a paper)

I've been trying to familiarize myself with the literature on far UVC light as a germicide. My question mostly pertains to figure 4 of this paper. The paper investigates the efficacy of 207 nm light ...
-1
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1answer
21 views

Can someone donate antibodies?

Consider the following scenario: Person A has been infected with some virus (for example, SARS-CoV-2) Person A has recovered From this scenario, I assume Person A has managed to develop antibodies ...
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0answers
16 views

Why hasnt been developed yet a COVID-19 vaccine? [duplicate]

I'm a complete noob when it comes to biology, but as far as I remember from my biology class, a vaccine is just a the viruses itself but in small amounts so that the immune system creates memory cells....
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0answers
10 views

How long does corona virus last on paper?

I’ve see multiple sites citing research that found the active virus particles being able to survive on cardboard for about 24 hours. I’ve seen less on clothes and more on hard surfaces like steel ...
-1
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1answer
56 views

A poor man's COVID-19 vaccine? [closed]

If person A is infected (COVID-19) and person B is not, could the following work as a vaccination? Person A exhales (coughs?) into a a transparent bag. The bag is radiated for a long time with a ...
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0answers
10 views

How can alveolar gas contain water vapor and less oxygen if the breathing loop is isobaric?

I was wondering why the partial pressure of oxygen is lower in the alveoli than in the air we inspire. From this related question I found the answer that the water inside the lung saturates the air ...
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0answers
5 views

Do sympathetic neurons innervate skeletal muscle?

Simply Googling gives a few contradictory answers. Anyone have a good understanding? Do sympathetic neurons innervate skeletal muscle?
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2answers
33 views

Can erythrocytes Function without plasma?

my title is not very specific. So i will proceed to clarify it. I am trying to make sure that the only blood cells in a sample are Erytocytes, since i want to evaluate their metabolism, I am aware ...
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0answers
13 views

Can humans eat a greater variety of things than other omnivores?

One thing that I've always noted is that humans seem able to eat just about anything that isn't toxic (and many things that are). Even when compared to other omnivores, I have the impression that ...
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3answers
93 views

Do all Viruses have the same RNA [closed]

Let's take the Influenzavirus as an example, and I have 5 of it. Would all 5 viruses have the same RNA with the same base order? Or would the RNA base order differ from eachother?
3
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4answers
74 views

What are the difficulties/challenges against developing a coronavirus vaccine?

Multiple groups of scientists are trying to develop a coronavirus vaccine but they are not yet being fruitful. What challenges or difficulties are there in the process that slowing down and/or causing ...
1
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1answer
47 views

is it possible to visualize coronavirus infection and what type of assays are routinely used?

There has been some electron micrograph of SARS-COV-2 published; but are there any fluorescent/ confocal-fluorescent image of them? or is it possible to do them? I know that viruses are usually much ...
0
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1answer
40 views

How lungs can inhale and exhale? [closed]

I know that lungs are extended and compacted by muscles to create partial vacuum to breath in, or to create elevated pressure to breath out. But one thing seems not right to me... As far as I know, ...
1
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0answers
33 views

how can we identify the novel protein amino acid sequence and function?

if there is a novel protein, how would you know the amino acid sequence and how would you determine the number of subunits and the function of that protein? Specifically what molecular techniques we ...
1
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0answers
33 views

SARS-CoV virus stability at low temperatures

For SARS-CoV-2 and SARS-CoV1 this study published in NEJM by a NIAID team was done at a temperature of 21-23°C (see the Methods section in their supplemental material). What's known about virus ...
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0answers
27 views

Why do some children refuse to eat? Is this more prevalent in some cultures and eras, or universal for the human species?

Some children are specially problematic to accept normal food. This happens equally in all human cultures and all epochs (i.e. is it a biological condition), or is it related to culture and family ...
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0answers
32 views

How COVID - 19 patient are recovering without cure?

How COVID - 19 patient are recovering without cure? I didn't understand how is it possible?
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0answers
20 views

Can an Audio be sent into object inside Electron Microscopy Unit?

I just wondering about this technology inside a special lab called Electron Microscopy Unit. Can we send a live (sound) to the object (cell/electron) inside that device? I mean for not a recorded ...
0
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0answers
7 views

Function of the mesentary in segmented worms?

The mesentary that appears at some phyla at some point in evolution, initially, what exact function does it have?
2
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1answer
13 views

Values of the blood tests pancreatic amylase and lipase

Anyone know what is considered slightly elevated, moderately elevated and strongly elevated values of pancreatic amylase and lipase? Many different laboratories in my country divide between these ...
2
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1answer
57 views

CRISPR-Cas9 knockout

With CRISPR-Cas9 I have conducted a targeted knockout of a DNA region encoding a certain protein (working with leukocytes). My question is, how long does it take until this protein is not detectable ...
3
votes
1answer
29 views

How does species diversity vs Earth total biomass relate?

Are there any laws/theoretical foundations about how diversity of species relate with total biomass on Earth? While there is a lot of esoteric sort of talk "humanity dis-balances the live on the ...
2
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0answers
26 views

Unable to identify bug/insect in house

I am not able to identify this bug/insect. I stay in Dubai and have been noticing this bug/insect in my apartment since a week now. It is so tiny that it's difficult to notice. The image below has ...
-1
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0answers
24 views

What is the ELF spectrum of SARS-CoV-2 when excited with Schumann resonanses? [closed]

According to prof. Luc Montagnier et al. some DNA sequences have extra low frequency (ELF) oscillating magnetic fields after having been exposed for a certain time to an electromagnetic field ...
0
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0answers
21 views

CoV SARS killed/ depleted with temperature & humidity conditions - Any such R&D for Corona Covid-19 virus?

What are the environmental conditions for SARS-CoV-2 to survive? CoV SARS killed or depleted with temperature & humidity conditions - Is there any such R&D for Corona Covid-19 virus? The ...
-1
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1answer
38 views

How many SARS-CoV-2 viruses in circulation at the moment? Mass?

How many SARS-CoV-2 viruses are in circulation at the moment? And what is their total mass? To clarify: if there are 10 000 viruses on average in an infected human and 100 000 humans are infected the ...
0
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0answers
7 views

Our Aspen are weep brown sap. A web site from Colorado said this condition is terminal for Aspen. Can you help? [migrated]

Our Aspen are weeping a brown sap. A web site said the condition is terminal. A local weed and feed company said the condition can be treated with an antibiotic for pigs. Do you have information on ...
0
votes
1answer
16 views

Relationship of RNA-binding proteins to peptidyl-prolyl cis-trans isomerase

I am studying a Plasmodium gene, known to encode an RNA-binding protein. However a BLAST search brings up mainly peptidyl-prolyl cis-trans isomerases from other species. Why would this be so?
1
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0answers
10 views

Why and how do red bone marrow concentrations in humans change during traditional aging?

I have found several pictures that suggest this is the case. As for peer reviewed papers I've found plenty of papers hypothesizing and testing as to the why of changes in populations of HSCs, a few ...
-5
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0answers
22 views

i represent a american home healthcare company and i want to buy about 500 -1000 coronavirse test kits for my patients and emplooyess [closed]

I represent a healthcare company and would like to purchase 500-1000 corona virus test kit where can i get them from and about how much do they cost and and reliable are the kits.I have tried to find ...
0
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0answers
11 views

How does shortening a muscle over a long period of time impact its length?

I have read that repeatedly overstretching a muscle will cause it to lengthen. The idea is that, as the muscle is stretched more and more, the muscle tissue increases the number of sarcomeres, which ...

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