0
votes
0answers
5 views

Is it true that the expiration date on the bottle of water does not apply to water, but the bottle?

I found on the internet today has just such opinions, but is it true?
0
votes
2answers
11 views

What happens when the brain is no longer capable of co-ordinating or regulating the heart and breathing rates?

Does the heart no longer function? Does it go into ventricular fibrillation? What happens?
3
votes
1answer
15 views

Trying to differentiate between the three muscle tissues with small pictures

For an assignment I have to differentiate the three types of muscle tissues in these three pictures . I'm having difficulty seeing the striations and branches etc. because the pictures are so small. ...
1
vote
0answers
13 views

Why is hyper pigmentation the common aftermath of skin lesions and abrasions?

I'm aware that melanocytes produce melanin, giving color to the skin, but why are these cells recruited or overactive when healing skin abrasions, lesions and sores when T-cells and inflammatory ...
-1
votes
0answers
17 views

How does the intra-esophageal presure affect the lower esphageal sphincter?

I know that the lower pressure in the thorax will cause the esophagus to have a lower pressure but someone told me that this forms a part of the physiologic lower esophageal sphincter. How so? ...
4
votes
1answer
23 views

Can people with paralyzed eye muscles see?

As far as I am aware, the saccades of the eye are central to sight perception. If the eye is held still, the human stops seeing, even if light is reaching the retina and the visual pathway is intact. ...
1
vote
1answer
12 views

Why does a tumour's genome change depending on the environment?

According to the book "Primer of The Molecular Biology of Cancer" by Vincent, Theodore and Ateven, the tumour cell is changed depending on its environment. performed genome-wide analysis on three ...
2
votes
1answer
10 views

Can methylation of a promoter induce gene expression in some rare cases?

Can methylation of a promoter induce gene expression in some rare cases? I've read somewhere that methylation of an intron can induce gene expression (eg. Igf2). How is that even possible? Thank ...
5
votes
2answers
267 views

What are the differences between cancer and tumour?

What are the differences between cancer and tumour? I mean is it in the DNA or shape or something else... And how can a benign tumour turn into a malignant tumour? The body has a lot of tumours all ...
1
vote
0answers
24 views

Largest direct ancestor of humans

Going back the genealogical lineage from present humans to the beginning of life, what was the biggest - in terms of body size or mass - animal in this sequence? More generally, what would a time vs. ...
1
vote
0answers
16 views

Does the metabolic rate determine how fast the telomeres shorten?

In many papers one can read that telomeres may play an important role in longevity. According to Calado et al.1 the telomeres of mice are much longer than the telomeres of humans. However, mice have ...
2
votes
1answer
141 views

Is this a grass cell?

I found this picture online claiming it was a grass cell. Clearly it is a cross section image but I was hoping you could tell me if this is actually grass, or something else if anything. Thanks!
0
votes
0answers
15 views

Does Pseudomonas aeruginosa have any common name at all?

Pseudomonas aeruginosa is the fifth most written about¹ binomial name of all species. I'm having trouble coming to terms with the possibility that such a well researched and studied organism has never ...
-1
votes
0answers
25 views

What is the most recent cytokine discovered in human? [on hold]

Has anybody found an updated list of all cytokines in humans. I will appreciate that. To the best of my knowledge it is IL-32, is there a more recent one?
1
vote
0answers
12 views

What would happen to a body in an astronaut suit over time if floating free? [duplicate]

I'm not sure if this is best in Biology or Physics, but on Earth we decay to skeletons and then eventually to dust. What would happen in space in a space suit?
0
votes
0answers
8 views

Relation between a compound's toxicity and it's concentration level [on hold]

I know that ammonia is toxic for the body since it disturbs enzymes of mitochondria. I want to know that why the ammonotelic animals don't get affected by it? I mean that even if there is plenty of ...
1
vote
3answers
26 views

why do some cells in the body prefer necrosis to apoptosis as a means of cell death?

There are many programmed cell death pathways, but some cells show a greater preference for some over the other. I'm wondering as to why if necrosis is an inflammatory response that causes damage to ...
0
votes
0answers
10 views

Is the molecular basis of asthma a polymorphism or mutation? [on hold]

I was researching this for a paper, and though, I've come across some articles that seemingly pose the answer. There were discrepancies between articles that explained asthma to be the product of an ...
2
votes
0answers
16 views

Cockroaches and magnetic fields

Aloha, I live in Hawaii working with sharks and their sensitivity to magnetism but here we also have large cockroaches. Has anyone worked with cockroaches and magnetism? I wonder if placing high ...
0
votes
0answers
27 views

Time taken to form a peptide bond

What is the time taken to form a peptide bond in-vivo or in -vitro ??? Have been taking courses on protein structures .was just curious to find out if any time scale is involved ?? Any ...
-1
votes
0answers
30 views

Zoology versus Physiology versus Physics [on hold]

How Physiology is different from zoology and physics? Physiology is the study of mechanism of living system but does it deal with such thing that are dealt by physics like kinetic energy and velocity ...
0
votes
1answer
44 views

Why do humans have eyebrows? [on hold]

Why do humans have eyebrows? It seems that it isn't necessary but only humans have them, correct? So what is the use of them for humans? I hear that they protect our eyes. However, isn't that what ...
1
vote
1answer
12 views

Mode of Enzymatic Inhibition via R-Allele

The photo above shows the effects of the R allele of the pea shape gene on the synthesis of an enzyme that converts unbranched starch into branched starch. The r allele of this gene determines an ...
5
votes
1answer
201 views

Why are particular laser-related skin products not recommended for darker skin tones?

This is about products such as: The "Theradome" laser helmet (this claims to stimulate hair growth through lasers) Theradome™, a biomedical engineering company based in the Silicon Valley, is ...
2
votes
0answers
6 views

How Many Generation We can Run a Mycelium of Pleurotus ostreatus/Pearl Oyster?

I am able to grow mycelium successfully on the spent coffee grounds. And mycelium is successfully fruiting once/twice on the same substrate. I am cloning by taking mycelium from the existing one ...
0
votes
0answers
21 views

What opens the lower esophageal sphincter(LES)? [on hold]

Is it true that the lower esophageal sphincter does not open under voluntary control? When a person swallows food, does something act to open it? If so, how is this opening mechanism called, and how ...
2
votes
1answer
14 views

Identification of unknown bagworm (Singapore)

This bagworm was found in Singapore (near McRitchie Reservoir) some time in June 2012. This is the plant from which the bagworms were obtained: A few examples of the bagworms: The bagworm when ...
1
vote
1answer
30 views

The damage of cancer cells

I read about the molecular biology of cancer, and I have a mess on my head and a lot of questions.. . My primary question is- The damage of the cancer cells is in the dna sequence or in the gene ...
0
votes
0answers
12 views

Tm and protein delta H [on hold]

we have 2 types of protein , one of them with Tm: x and another one with Tm: x+y but once with lower Tm has higher delta H and another one with higher Tm has lower delta H . how it could be possible?
1
vote
0answers
16 views

Question about clusters and populations [on hold]

Whats the difference between a cluster and a population?...and do non africans cluster together? Examples European populations or the niger congo cluster.
1
vote
1answer
32 views

Gradualism vs. Punctuationalism

TLDR? Just read the bold bits! I started with Darwin's Origin of Species, and then read Dawkins's first three books The Selfish Gene, The Extended Phenotype, and The Blind watchmaker (I just started ...
-3
votes
0answers
17 views

Do bigger things smell more or build more odor? [on hold]

My mother is always saying that, "The bigger the animal, the more the smell." I was wondering, at least to what degree (if it's actually true), how well this would apply. For example, my girlfriend ...
1
vote
0answers
25 views

How to measure chemical elements in soil? [on hold]

What sort of equipment would one need to ensure that plant soil contains the right concentration of the 13 mineral nutrients necessary for plant growth? As far I understand, it's vital that all the ...
9
votes
2answers
627 views

Species ID: Cape Town mystery insect

This insect bumbled into my bedroom last night - can someone ID it for me? I'm mainly curious because I'd like to know if it poses any danger to my cats (who were very eager to add it to the menu). ...
2
votes
0answers
16 views

Why are riboswitches mostly present in bacteria and not in eukaryotes?

Riboswitches are a rather elegant way to regulate gene expression without any additional machinery. A small ligand binds to the mRNA and directly influences transcription or translation. Most of the ...
2
votes
0answers
23 views

Is there any tree or other plant that produces a new crop in fast cycles? [on hold]

Is there any tree or other plant that produces a new crop in fast cycles? By fast I would mean something much more often than once or twice a year, like every month or every few weeks. What is the ...
2
votes
0answers
27 views

Can protein sample be made 2% Triton X-100 free?

The protein I am purifying needed an elution buffer with 2% Triton X-100. I formulated the elution buffer not keeping the CMC in mind. My goal is to make my protein sample triton free to check its ...
0
votes
1answer
33 views

How much mass does a person lose in a day through breathing and perspiration?

Water and carbon are lost through perspiration and breathing. How much mass is lost in this way in a single day for a typical person?
2
votes
0answers
20 views

What has to duplicate before cell enters M phase?

What has to duplicate before cell enters M phase? DNA histones centrosome mitochondria (any other organelles?) condensins (not sure?) have I forgotten anything? Thank you in advance!
2
votes
1answer
44 views

How can a brainless Cnidarian hunt and defend itself?

Cnidaria, such as jelly fish and sea anemones are radial symmetric en feature a simple body plan. One notable aspect is the lack of a brain. Hence, there is no central guiding structure, no mind or ...
-2
votes
0answers
19 views

What occurs with mutations? [on hold]

If a certain set or group of cells or tissue are undergoing a lot of reproduction and repair cycles for some unknown reason and a lot of mutations in the resulting daughter cells occur because of this ...
2
votes
0answers
16 views

What are the biological mechanisms of candy causing nausea?

As I sit here after eating too much chocolate, I wonder: What are the biological mechanisms behind eating too much candy candy causing nausea in a healthy individual? Is it a spike in blood sugar, ...
3
votes
3answers
60 views

True or false & fill in the blanks

A ribosome is where amino acids are linked together by peptide bonds. A virus is NOT considered prokaryotic because it does not have a membrane. The nucleotide ATP is one of the most used energy ...
0
votes
0answers
20 views

Who know the technology about SEAL for developing antibodies? [on hold]

Who know the technology about SEAL for developing antibodies? We need custom antibody for our research and I found a technology named SEAL.Sound good,but never take before,it's cheaper than others,but ...
2
votes
1answer
24 views

Is it possible to estimate how much variation in common phenotypes is predicted by genetics?

Phenotypes such as; skin color, eye color, nose shape, lip size, limb proportions, and skull shape. Im trying to find a source for this quote. "If you ask what percentage of your genes is reflected ...
3
votes
2answers
58 views

Assessing probability from a pedigree

This isn't exactly homework but I'd like to treat it as such. I'm asked to find the probability that both (III: 2) and (III: 3) are carriers given that (II: 7) and (III: 1) exhibited the recessive ...
1
vote
1answer
24 views

What is Mendelian Segregation and how is it related to the Hardy-Weinberg equilibrium?

I can't find the exact definition of Mendelian segregation. In addition, I am wondering how it is related to the Hardy-Weinberg equilibrium?
1
vote
0answers
33 views

What species of Cerapoda lived during the Jurassic?

So far, I've found eleven species of Cerapoda that lived during the Jurassic period. Are there any other known species that I've missed? The eleven that I've found out about are: Agilisaurus ...
-3
votes
1answer
40 views

Could we engineer humans to behave like insects? [on hold]

First off, though complex, I'm assuming insects are at an earlier evolutionary stage than humans. That being said, could humans be genetically engineered to behave like insects? I'm not talking about ...
-3
votes
1answer
43 views

Equilibrium potential in cells [on hold]

If the equilibrium potential for Calcium is 122 mV and the resting potential of a cell is -70 mV, would it depolarize or hyperpolarize if the cell becomes more permeable to Ca2+. Intercellular conc ...

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