17
votes
3answers
444 views

Why would diffusion be faster across a non-specialised tissue?

The standard protocol for a person experiencing chest pains is to chew a 300mg aspirin tablet, the argument being that chewing rather than swallowing the tablet results in the aspirin entering the ...
8
votes
6answers
943 views

Why can't we see in low light if staring long enough?

For me it seems reasonable that if I kept my gaze on a fixed point in a room with low light, a progressively brighter and better picture would appear before my eyes, just like a camera can see in the ...
1
vote
1answer
9 views

Crossing over and exon shuffling?

Campbell Biology 10e, in discussing the functions of introns, writes: The presence of introns in a gene may facilitate the evolution of new and potentially beneficial proteins as a result of a ...
0
votes
1answer
14 views

Countercurrent multiplier mechanism

How exactly does the countercurrent multiplier mechanism work in formation of urine in the body? I am unable to find a satisfactory answer to this.
0
votes
0answers
19 views

Are the cells (structures) of deep sea fish different? And can they survive in shallow water?

In the deep oceans the pressure is enormous. But still there are fish living. But are the cells of them different from fish who just live at the surface of waters? For example, are the cells smaller ...
2
votes
1answer
197 views

Is this lovebug?

I used to see these kind of insects very frequently in Chennai and Bangalore (south India). Just wanted to know if this is a kind of lovebug. The lovebug as in Wikipedia page is very different in ...
1
vote
0answers
6 views

Distinguishing Father from Brother

Given the (non-identical) DNA sequences of two men and the knowledge that the second man is either the father, brother, or son of the first man, is the DNA useful in determining which of these three ...
0
votes
1answer
9 views

What separates gene loci?

Introns are sections of noncoding DNA that separate exons within a gene locus. However, between different gene loci, I also would assume there to be noncoding regions of DNA. What are these regions ...
0
votes
1answer
29 views

new DNA sequencing technologies? [on hold]

Last year I did my thesis in the field of a new method for DNA analysis. Which I think is very interesting although I cannot seem to find any new methods in this field especially the SMRT sequencing ...
0
votes
1answer
22 views

Why did eukaryotic cells develop? [on hold]

If eukaryotic cells can survive in extreme conditions, then why are their still prokaryotic organisms?
3
votes
1answer
77 views

What causes inhalation during breathing?

I have read here that the two major inhalation muscles are the (1) diaphragm and the (2) external intercostals. Additionally, inhalation can also be caused by (1) expansion of the abdominal cavity, ...
0
votes
1answer
11 views

The question of the protein and the ribosome

It is well known that proteins are spit out by ribosomes by reading the DNA that goes in. Now ribosomes are made of proteins. Doesn´t this mean that the riobosome structure came before the production ...
1
vote
0answers
19 views

How can I estimate the CO₂ uptake of a plant?

I would like to make an estimation of the CO2 uptake of plants I cultivate, including, lettuce and aromatic herbs, such as thyme, basil, rosemary. What I want is to end up with a rough indicator for ...
2
votes
1answer
46 views

Change in synthesis rate of a molecule changes equilibrium concentration

I was reading the topic of 'The concentration of the molecule can be adjusted quickly only if the lifetime of a molecule is short' from Molecular Biology of the Cell by Alberts. At the end of pg-837 ...
1
vote
0answers
11 views

Wax layer destruction from seed coats

I'm working with some orchid species, and i encounter a specific issue. Some of those species deposits upon their seed coat a wax layer. This layer makes seeds behave in a very hydrophobic way. You ...
0
votes
1answer
34 views

Solving a Pedigree Between Heterozygous Half-Cousins

A man who is a known heterozygous carrier of oculocutaneous albinism marries his half-cousin (they share one common grandparent) as shown in the pedigree below. This trait is transmitted as a fully ...
1
vote
1answer
96 views

Biological implementation of convolutional neural networks

In computer science, 'convolutional neural networks' are used, that are meant to be inspired by biological network structures like found in the human brain visual cortex. In the computer ...
0
votes
0answers
47 views

What would happen if a cell is poked by a fine needle? [on hold]

I had seen this question in an exam: A living cell has a protoplasm which is water based and demarcated by a lipid bilayer membrane. If a cell is pierced to 1/5th of its diameter with a very sharp ...
0
votes
0answers
7 views

What are the most currently effective ways of delivering material to the body, and housing it in the body?

My question is about the most effective ways that currently exist (or some of them) for both delivering foreign material inside the body, and keeping it safe from the immune system. For an example of ...
6
votes
1answer
154 views

How did birds survive the KT impact?

As I understand it, the ejecta resulting from the K-T impact (also known as the end-Cretaceous or Cretaceous-Tertiary extinction event) re-entered the atmosphere all over the world; the heat from ...
0
votes
0answers
10 views
1
vote
1answer
8 views

Anemiaceae etymology

What is the etymology of the name Anemiaceae for a family of ferns? I assume that it's from the name Anemia for one of its genera, but that is equally mysterious. Obviously it has no blood, but what ...
6
votes
2answers
124 views

Why is a heritability coefficient not an index of “how genetic” something is?

On his blog, Eric Turkheimer writes: [T]aken as a number, a unit of analysis, heritability coefficients are funny things to aggregate on such a massive level. What exactly are we supposed to ...
2
votes
2answers
99 views

How long do viruses, such as Zika, stay in the body?

Can a virus stay in your body (after recovery) in a concentration that is sufficient to infect someone? Is it known how long the Zika virus persists in the body?
1
vote
0answers
9 views

How should one interpret heritability? Is it related to $R^2$?

From Wiki: Heritability estimates are often misinterpreted if it is not understood that they refer to the proportion of variation between individuals on a trait that is due to genetic factors. It ...
0
votes
0answers
16 views

Hormones of a 5 year old girl

What kind of hormonal changes do 5 year old girls experience? Also how can they change the behavior?
0
votes
1answer
18 views

Energy input during ATP Dephosphorylation?

What is the energy input needed to break the phosphor bond during ATP Dephosphorylation? How and when this will occur? Many thanks for your answers. Edit 1: I know how much free energy (∆G) is ...
-2
votes
0answers
20 views

Is it true that the water in coconut reduces the effect of drug taken in the body [on hold]

I'm not actually sure of this, but I was told by a colleague of mine, and I thought of getting other comments about this to learn more about the effect of coconut water or juice
4
votes
0answers
47 views

What causes humans to be physically weak compared to animals like gorillas?

Animals like gorillas seem to have a physical fitness and muscle mass that don't depend as strongly on how much exercise they get, compared to humans. E.g. gorillas living in the wild sleep and rest a ...
0
votes
1answer
29 views

Where can I find a file listing the genetic differences in humans?

I don't know much about genetics. For an arts project I'm looking for a human genome. I read that: Only about 0.1% of the genome is different among individuals, which equates to about 3 million ...
0
votes
2answers
49 views

Why did multicellular organisms develop when a single cell can survive on its own?

Since unicellular organisms can survive, why would there be development of multicellular organisms?
0
votes
1answer
21 views

Why doesn't one develop immunity to bacterial STIs?

Why doesn't one develop immunity to STIs such as Chlamydia/Gonorrhea and Syphilis even after the first exposure and treatment with antibiotics?
1
vote
1answer
50 views

Why RTK Truncations So Common in Transformations

So if we can understand that RTKs are 'floating' around the surface of a cell as monomers until ligand binds one of the monomers and thereby acts as a bridge to facilitate binding to a corresponding ...
4
votes
3answers
9k views

Is it possible for a child to grow taller than their tallest parent?

I have heard that offspring can't grow taller than either of their parents but I've also heard that sometimes some gene activation can skip generations. Is it possible for a child to grow taller than ...
2
votes
2answers
58 views

How to obtain a tardigrade?

The tardigrade is often mentioned as one of the most "alien" lifeforms on Earth. This video speaks for itself: (from this article) I have long wanted to see a tardigrade with my own eyes. I have a ...
0
votes
0answers
14 views

Tardigrade genetic acceptance and experimentation?

Does this property of tardigrades, that when under extreme conditions they are more permeable and more easily accept sections of genes developed in other species, as I understand sometimes transfered ...
0
votes
1answer
75 views

What do Illumina HiSeq/MiSeq paired end reads look like?

My understanding is that paired end reads from the Illumina HiSeq/MiSeq platforms looks something like this: R1: AAAAAACCCCCC R2: GGGGGGTTTTTT Where the ...
27
votes
5answers
7k views

If evolution is not about improvement, why is there so much improvement?

In my last question I asked why we don't see improvement in artificial life simulations of evolution. It seems I had fallen for a common misconception, that evolution was about improvement. One ...
3
votes
0answers
151 views

How many ATP are formed?

What is the number of ATP molecules formed during the photosynthetic processes which consume 8 molecules of $\text{H}_2\text{O}$ due to noncyclic electron transport and subsequent ...
3
votes
1answer
48 views

Could a single cell be brought to life?

If a scientist is observing a single cell under a microscope, and then realizes that the cell has died, is it possible to bring that dead cell back to life? For my inquiry, let's assume that the ...
2
votes
1answer
66 views

Synaptic pruning and selective elimination during adolescence

How does Synaptic pruning occur during pre-adolescence, adolescence and post-adolescence, after there is blooming overproduction of synaptic connections until the years of late childhood, and how does ...
0
votes
0answers
8 views

Glycoprotein hormones metabolism

Why do the carbohydrate groups in glycoprotein hormones decrease the rate of metabolism? And increase the half-life?
1
vote
0answers
16 views

Did the number of rods changed from ancient time?

Correct me if I am wrong, but I know that rods work under limited light conditions only. But now we are in a world that always have lights everywhere unlike ancient time when humans had to deal with ...
1
vote
1answer
64 views

How can a blood test give information about rickets?

Can we detect rickets from a blood test? What evidence pf rickets is in the blood and how is the blood treated to detect rickets?
0
votes
0answers
3 views

Steps between Expression & Commercialization of a recombinant organism

What are typical steps that follow after one has successfully expressed a hetrologous gene in a host organism before one has a viable industrial process for the metabolite expressed? Let's take E ...
3
votes
1answer
84 views

Relationship between mN and mg in vessel contraction studies?

What is the relationship between mN and mg as the units involved to measure the changes in contraction? A tool most widely used is an instrument called myograph. In these exoeriments, either units of ...
0
votes
0answers
6 views

Orangutan Nests - Necessary To Teach Offspring ?

" Young orangutans learn by observing their mother's nest-building behaviour. Nest-building is a leading reason for young orangutans leaving their mother for the first time. " ...
0
votes
1answer
16 views

Where does the lactate produced by tumors go?

Tumors are known to burn glucose and secrete lactate (this is known as the Warburg effect). Where does this lactate go? Does it steadily accumulate in the neighborhood of the tumor? This doesn't ...
0
votes
0answers
21 views

Can you feel what's happening in your brain? [on hold]

There are specific instances in which I feel areas of my brain. I assumed I was making it up because "the brain doesn't have any pain receptors" but recently thought of headaches, and looked online to ...
1
vote
0answers
27 views

About photosynthesis VS respiration

Is it true to say that the electron transport chain in photosynthesis and respiration is slightly different, regarding to the direction of H+ pumping and flowing back in through ATP synthase? ...

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