0
votes
0answers
2 views

Diseases and Immunity

Unlike malaria,TB is found across the whole world.Why and explain?I mean why are people affected with TB more than malaria and some say that in cold and developed countries malaria is less but TB ...
0
votes
0answers
9 views

Rate of diffusion

I need to find out the intial diffusion rate across membrane. I know the formula of J=DA(C1-C2) but i am confused about how to make the calculations I also know the following: 1) Na+ concentrations ...
0
votes
0answers
3 views

Is salivation decrease during sleep beneficial?

Papers [1, 2, 3] tell that a salivation decrease is not only unpleasant, but harmful for dental health. What cause that decrease? What is the reason for it and do animals have it? I guess it's a ...
0
votes
0answers
3 views

Where do I find the label, whether this file data corroborates to a healthy tissue or a cancerous one in TCGA data?

I downloaded the TCGA dataset for LUAD (Lung Cancer), I find each file with miRNA sequence data like readCount and parts per million value and their are around 123 samples. But where do I find the ...
0
votes
0answers
4 views

Are there any (chemical) processes occuring inside a seed while it's in a dormant state?

If a seed were in a glass jar without a chance of germination, are there any (chemical) processes occurring inside the seed while it sits there? My intuition tells me no since my understanding of ...
1
vote
1answer
18 views

Are ribosomes assembled in rough ER and Golgi body, or in the nucleolus?

I mean all the components, such as ribosomal RNA (rRNA) are synthesized in the nucleolus, but is the whole ribosome structure assembled in the nucleolus or is it also done in the rough endoplasmic ...
0
votes
0answers
6 views

About Hermaphrodite Mitochondrial Inheritance

From the textbook I've learnt that in general mitochondria are inherited maternally. However if the cross is between hermaphrodites (e.g. in C.elegans), where, in most cases, then should the ...
0
votes
0answers
8 views

How do female birds display sexual arousal/availability?

Maybe the answer depends on species. In this case I would be happy with few examples. Also: I know that many female mammals display lordosis behavior that indicate receptivity to copulation. Do birds ...
2
votes
0answers
18 views

Did the Great Oxygenation Event also cause a mass extinction?

Its usually assumed that the Great Oxidation Event around 2.3 bya caused a great extinction of anaerobic life on earth. But as I was reading Nick Lane's book, ...
0
votes
0answers
7 views

Pressure produced by blowing with mouth

I need some figures on the pressure humans are capable blowing with their mouth with zero flow. I only need very approximate figures. I'm guessing around 500mm of water? I haven't got a tube handy to ...
0
votes
0answers
12 views

What is the most important factors that affect our taste?

What ist the most important factor that affects our taste? our mood? (such like GERD) our genes? (more mascular people will need more protein) the food we ate recently? (to choose more diverse ...
0
votes
0answers
11 views

How can I apply any machine learning model/classifier on miRNA seq data?

I recently got micro RNA sequencing data from the TCGA. I am currently trying to early detect Mesothelioma. How is microRNA seq data different from microRNA expression data? MicroRNA expression ...
0
votes
0answers
7 views

Bence-Jones proteins in urine on heat

The preliminary test for proteinuria is precipitation/turbidity on heat due to denaturation. This turbidity should not disappear when 10% acetic acid is added - to differentiate from phosphates. ...
2
votes
1answer
18 views

Do we know a complete list of nutrients that humans must ingest to live?

When the people who are making "nutritionally complete" foods like Soylent are developing their product, how do they know that they've covered all their bases? You need to have protein, carbohydrates, ...
0
votes
0answers
18 views

nitrogen isotopes in plants

From what I know it is possible to assess an animals diet based on stable isotopes from carbon. Does anyone know if its possible, in a similar way, to derive animal community based on N-deposits which ...
1
vote
1answer
89 views

Is metastatic cancer always lethal if uncured?

Can matastases spread in different parts of the body of an animal suffering from cancer grow in a limited way, such as not to cause much more harm that a benignant tumor in those parts of the body ...
2
votes
2answers
35 views

Is there a term for when a detrimental gene can be positively selected for because of linkage to a very fit gene?

Let's say that some piece of DNA would be subject to extreme negative selection if it were independently inherited, but it is very closely linked to an extraordinarily fit gene, and so the complex it ...
1
vote
0answers
44 views

Does reproduction cause aging ? Is aging just a strategy to increase reproductive success in all organisms? [on hold]

Background for why I am asking this: I read a book—modern biological theory and experiments on celibacy— which uses life history theory to imply that reproduction is the reason why organisms grow ...
0
votes
2answers
35 views

Are there genes in sex chromosomes that determine facial features?

My friends and I were bored enough to try out this activity. Picture a teenage boy in your mind. From this picture, remove any accessories (glasses, piercings, etc.), moustache or beard, then ...
-2
votes
0answers
14 views

Why do electrophoresis gel boxes only have 1d wire electrodes and not a 2d 'mesh' as used in clarity?

Since the DNA and protein are electrophoresed in a 2d plane, I am surprised that a 1D wire electrode is used for anode and cathode, and not a 2d mesh-like pattern. In the clarity technique on the ...
0
votes
0answers
23 views

CRISPR Cas9 most updated paper protocol

I am collecting literature to start a new project on CRISPR Cas9 gene editing. I must put together a protocol to start asap. I am intending to use the following paper as guidance: "Genome ...
1
vote
1answer
14 views

A question regarding trichomes in plants

Trichomes in general are features of xerophytic leaves, which reduce water loss by evaporation by trapping water vapor and increasing humidity (as a result lowering the water potential gradient). BUT ...
-2
votes
0answers
23 views

Information about sharks [on hold]

would it be possible for a shark to digest clothing it has consumed during an attack on a human,For example Wetsuit,swim trunks or speedos.
-4
votes
0answers
17 views

after activation of right brain can we smell colours [on hold]

Does colours have smells and is it true that after activation of brain we can identify colours by blindfoldings
1
vote
1answer
21 views

Respiration of an animal cell media

I want to do respiration process of an animal cell media in laboratory environment. I don't entirely sure how to supply it with Oxygen to the process because it is a gas, but not a liquid.
9
votes
3answers
70 views

How does the brain immediately know when one's thirst has been quenched?

The question struck me the other day when I drank a glass of water. I understand that there are at least two conditions under which the brain signals thirst: extracellular thirst, when there's not ...
1
vote
1answer
13 views

What will happen to a neuron if I suddenly remove the pump but not the leaky Na+ and K+ channels?

K+ is more abundant inside the cell and thus has a propensity to move outwards. It has an equilibrium potential of -80 mV. Na+ is more abundant extracellularly and thus has a propensity to move ...
2
votes
1answer
16 views

What is the Cordil that Edward Topsell describes?

In his "History of four-footed beasts and serpents", Edward Topsell describes a "serpent" called Cordil. Since he lists everything that crawls on the ground as a serpent, regardless of being a ...
1
vote
0answers
25 views

Why do some men have patchy beards?

Why do some men have patchy beards? Or more specifically, why would some hair follicles lack sufficient 5-alpha reductase while others nearby don't when their genetic code is identical and they are ...
0
votes
1answer
21 views

Number of pair of chromosomes in sex cells of human [on hold]

Just wondering how many pair of chromosomes in sex cells of human? How many single chromosomes in sex cells of human? Thanks for your help! It is said the chromosomes in sex cells are haploid?
1
vote
1answer
32 views

What is a “noninvasive” biomarker for a disease?

What is a "noninvasive" biomarker for a disease? I know what a biomarker is, but what makes it noninvasive?
3
votes
1answer
22 views

Large black caterpillar, cocoon, moth - Los Angeles

This is my first visit here, probably the first of many, since I have many species to identify! The first is a regular resident of my back yard in the Los Angeles neighborhood of Mt. Washington. It's ...
2
votes
2answers
28 views

Separation of smaller DNA fragments and larger fragments without using gel electrophoresis?

For an upcoming experiment I would have two kinds of DNA fragments in a sample after a particular reaction step: First there would be fragments of a length of approx. 170 bps and then there would be ...
2
votes
1answer
41 views

What's the proper term for “brain waves” read from an EEG?

An EEG records the electrical activity of the brain. An EEG shows voltage differences as a function of time and shows what have become known as "brain waves". Is there a scientific/technical ...
-3
votes
0answers
50 views

Why/How does matter on earth exist in all 3 states of matter? [on hold]

Why does most matter on earth exist only in the form of liquid/solid/gaseous? I know that helium is an exception to this rule, and that all atoms itself will always be the same, whatever state it is ...
-5
votes
0answers
31 views

Shrink an animal using genetics [on hold]

I need to know this for a science project: Can you shrink an animal using genetics?
1
vote
1answer
46 views

What is the name of this beautiful white trees?

I found this beautiful white trees in an unknown video.
-2
votes
0answers
20 views

Is there a logical problem between biology taxonomic categories of domain and kingdom? [on hold]

A tree of life should be diverging right? If the current hierarchy of biological taxonomy is now: "all life, domains, and kingdoms followed by phylum, class, order, family, genus, species." And if ...
1
vote
1answer
64 views

Which are the last cells of the human body to die?

When somebody dies, which are the last surviving cells of his/her body? Those of hair, nails, or some other obscure but resilient cells? Shedding light on why and how they are so vital might boost ...
0
votes
0answers
13 views

Optimum gibson assembly overlap length

Does anyone know the optimum length of overlap your primers should have to your vector for gibson assembly. Most manufacturers say to do at least 20 bp on both side but don't give a maximum. Sometimes ...
0
votes
1answer
33 views

Assuming if height was fully determined genetically, what would be the concordance between monozygotic pairs?

I fully understand the differences between monozygotic and dyzogtic twin pairings, but I wondered how I could put into words the reasons why the concordance would be very high. Derived from same ...
-2
votes
0answers
16 views

Could humans metabolize gasoline? [duplicate]

Gasoline is mostly made of organic compounds/fats/oils. Food is also made mostly of similar organic compounds. Therefore, would humans be able to metabolize gasoline, or some of its components, for ...
1
vote
3answers
42 views

What is the role of TATA box in transcriptional regulation? [on hold]

I know what is the TATA box, but I wish to know whether it has specific roles in transcriptional regulation.
2
votes
1answer
24 views

Question about Enzyme Inhibition in relation to Aspirin

I've been trying to learn a bit more about pharmacology, so bear with my ignorance. In short, I see that aspirin (in part) works by inhibiting cycloxygenase isoenzymes and that this inhibiting is ...
0
votes
0answers
15 views

Did Cyanobacteria alone create the oxygen in Earth's atmosphere 3.5 billion years ago?

In other words, is the conveniently close-to-Californian-Universities pools of such representative of accepted theory. With the immediate follow-up question, when did the much more impressive amount ...
1
vote
0answers
4 views

What is a rough estimate of CO2 saturation for high-yield or high growth rate plants?

Naturally, plants have individual photosynthesis capacities, but it would still be interesting to get a general picture of CO2 saturation levels for some common cultures. Where lies the optimal yield, ...
3
votes
0answers
5 views

At which voltage will the conductance decrease due to the narrow pore in a voltage-gated potassium channel?

If you have a voltage-gated potassium channel that do not inactivate, at which voltage would you see decrease in ion conductance related to the narrow path in the pore? With that said I know that in ...
0
votes
0answers
26 views

Can sleep be replaced by chemical supliments? [on hold]

If adenosine makes a person sleepy to rebuild chemicals in the brain, than is it possible to inhibit adenosine and externally produce and inject the needed chemicals?
0
votes
2answers
29 views

What kind of fish are these?

This should be pretty easy. We have a tropical fish tank, and among a few other species we have an adult pair of these guys. The female is a live-bearer, and seems to be giving birth to two young at a ...
1
vote
1answer
14 views

TRANSFAC Matrix.dat retrieve count matrix using BA or CC field

In the TRANSFAC Matrix.dat most of the motifs are given in the form of count matrix, but a few of them are given as some kind of frequency matrix. Those aren't ordinary PWMs because rows don't sum to ...

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