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5
votes
2answers
86 views
+50

What was the biological mechanism that allowed Tarrare to eat so much?

Are there any conjectured mechanisms that cause Tarrare's extremely oversized stomach and abdominal cavity? Along with his superhuman appetite of course. Whether from a medical perspective or a ...
-2
votes
0answers
13 views

Is dopamine released when we listen to a joke or something funny and why?

Why do we feel so happy after listing to something funny? Why do we crave spending time with people who are funny?
4
votes
3answers
1k views

Phospholipid Bilayer structural reversal

What would happen if the phospholipids in the phospholipid bi-layer were reversed, the fatty acid tails now facing outwards and the phosphate heads facing inwards? I'm assuming this will not affect ...
0
votes
0answers
13 views

Does intelligence depend more on environment than on genetic factors?

Many have argued that the test of IQ is simply a test of language. The application of the test consists of asking a number of questions. The person should understand the question presented to them and ...
15
votes
7answers
5k views

Online Molecular and Cellular Biology Video Lectures?

I am looking for video lectures to go through to guide my reading in intro molecular and cellular biology. I've had intro bio and I study evolutionary theory, but my molecule- and cell-level knowledge ...
2
votes
3answers
3k views

Book Recommendations: GRE Subject Test In Biochemistry, Cell And Molecular Biology

There are probably a lot of really good answers that may vary significantly in terms of content. I'm looking for a set of books that I can read in preparation for the GRE Subject Test In Biochemistry,...
0
votes
0answers
5 views

What are the Uses Of PEG Derivatives & Polyethylene Glycols (PEGs)?

In drug delivery, cancer diagnosis, wound healing, tissue scaffolding models, cell culture and tissue regeneration, various uses of polyethylene glycol and PEG hydrogels are used. Other polyethylene ...
0
votes
0answers
10 views

Person-years and relevance to incidence of condition

If the annual incidence (age and sex-adjusted) of a particular condition x is 21.8 cases per 100,000 person-years and this data was determined in one geographic location, then is it correct to say in ...
1
vote
0answers
35 views

Species identification: 2.5mm (3/32“ or 1.5/8”) brownish ant in highrise apartment

Can anyone please identify this ant? In case it helps, 3 attempts of using Ortho Ant Bgon Max gel and bait has not helped. They 2 were administered 2 weeks apart. Apparently, it's basically borax ...
0
votes
0answers
24 views

Farsightedness and the eye

When a farsighted person looks at a distant object and sees it clearly, what is the state of their eye lens? Is it relaxed? Rationale: It is something we read about in class that is confusing.I know ...
2
votes
2answers
23 views

Does the Rayleigh formula apply to electron microscopes or only light microscopes?

I am asked to determine the resolving power of both a TEM (transmission electron microscope) and a SEM (scanning electron microscope) and given the Rayleigh formula below. $$Resolution=\frac{0.61\...
1
vote
0answers
14 views

Medical terminology for asymmetrically-shaped paired body parts?

Some people have different sized feet [source], a limb that is slightly longer than the contralateral (on other side of the body) limb [source] , etc. These size differences in paired body parts on ...
0
votes
0answers
10 views

Can foraging worker ants become queens?

The TL;DR is in the subject line. The back story is as follows. I am combatting ants in my highrise aparment unit. One piece of online advice was to vacuum regularly, and pay attention to edges of ...
-1
votes
0answers
28 views

Why are human mothers told to “push” out a baby?

I've always wondered why human mothers are instructed to "push" when giving birth. Every other animal just gives birth of it's own accord. Albeit perhaps from a different position with the help of ...
3
votes
1answer
13 views

Why does mold grow on silicone caulk?

I notice mold likes to grow on silicone caulk. I find it odd since silicone is mostly inorganic and doesn't contain any nutrients for mold to grow on unlike soil and clothing. Can mold metabolize ...
4
votes
1answer
73 views

How does the stomach handle continuous eating?

In biology class, we learned this familiar story: Food enters the stomach, the stomach churns it with acid and enzymes, and then, somehow, the stomach senses when the stew is ready and releases it ...
4
votes
1answer
32 views

Chromosome naming convention: Why are there chromosomes named “1” and “1A”?

I've been stumbling on multiple genome of birds where there is a "1A" chromosome and a "1" chromosome. For example, the zebra finch has 1A and 4A. What does that mean? Do you have any resource about ...
0
votes
1answer
13 views

How does Line Integrate work on a laser scanning confocal microscope?

Most microscope software provides options for line average or line integrate as a function that helps the signal to noise ratio when taking an image. The math behind line average seems straight ...
2
votes
2answers
91 views

Is there a physiological reason why direct lightning strikes are not lethal for everyone or does it all come down to dumb luck?

Some people who get directly struck by lightning and some more than once (starts at 00:25) survive while others die instantly or later on due to complications/injuries. Looking at a wiki page for ...
0
votes
1answer
22 views

Chromosome size without heterochromatin

Im doing different analysis of the human chromosomes and diffent loci, however when using different databases, the heterochromatin structures are not part of the human genomes. I know that ...
2
votes
2answers
528 views

Can the retina emit light?

The retina is light sensor, which converts light to an electrical signal. LEDs can both emit and receive light. Similarly, is it possible to apply electricity to retina to generate light? Simply put,...
0
votes
1answer
25 views

Is there any evidence that genes which are associated with physically adjacent structures are located near each other within the genome?

I am not sure if there are individual genes for, say, fingers and if so, would such genes be near the genes that affect hand growth? If not "near" in the Euclidean sense, could there be a different ...
1
vote
1answer
33 views

Water sample preservation

I am taking my students to collect water samples from different bodies of water. These bodies of water include the local river, a park pond, and water accumulation from recent rain. Once we gather the ...
1
vote
0answers
61 views

Identify round, green, flying insect with spikes in South Carolina (USA)

The tables have turned -- I need some help IDing an insect: I've been unable to identify an insect that I came across about 6 years ago in South Carolina (USA). We were doing a vegetation survey in ...
-1
votes
0answers
16 views

What kind of household fly is this I’ve only seen in the summer? How do I get rid of them they keep bothering me while I sleep

This fly has red eyes kind of a long body doesn’t fly consistently. Is attracted to light some of them are some aren’t and is very annoying comes in large numbers 10-20 in my room approximately. (...
0
votes
0answers
8 views

Why are some specific names / items harder to remember [migrated]

I will take an example specific to myself to illustrate: Having a very solid music culture and a quite good one about movies, a few cues usually help me remember the works in question. Sometimes I ...
0
votes
0answers
9 views

Quatilitive Microbial in sample

I my labs I incubate sample with suitable media and read the plate after three days. But, I just need quatilitive microbial in sample. I just think about HPLC with detector can detect protein/...
-1
votes
0answers
9 views

What kind of Phosphate is used for fermentors?

Do biotechnology companies buy SSP, TSP, or some other purer phosphate for bioreactors?
1
vote
1answer
25 views

Bacterial Growth Formula

What are the units of $N$: the colonies of bacteria or the viable cell count? This is in regards to the bacterial growth formula used during serial dilutions, $$ N =N(0) e^{kt} \quad . $$
0
votes
0answers
22 views

Are PVC&PET bacteria found inside homes?

I am interested in weather PVC and PET eating bacteria can be found inside people's homes. The PET consuming ones were found in or near plastic waste dumps or in the ocean, but would they also have ...
-1
votes
0answers
14 views

Can anyone identify this caterpillar? Seen at St. Herman's Cave in Belize, June 2019

I saw this caterpillar as we were leaving St. Herman' Cave in Belize. I would love to know the name and what butterfly it may become.
0
votes
0answers
22 views

Vitamin C: major enzymatic catalyst but no gene? [on hold]

We need Vitamin C to absorb Iron. It's also a major catalyst for many other bodily functions. Yet, unlike most mammals, we don't synthesize it. Why did we loose this gene. Is this nutrient really ...
2
votes
3answers
111 views

How are viruses isolated?

I read several different articles about virology, including the Wikipedia article on viruses and none of them explain how a virus is isolated. Some talk of injecting a virus into a chicken egg, but ...
0
votes
0answers
7 views

What is the typical range of volumetric productivity and cell density in aerobic fermentor bioreactors for microes?

Im doing research on biomass production. Its hard to find data for this question. I need citations to calculate the production rate of microbial biomass in bioreactors (e.g aerated fermentator). ...
-1
votes
0answers
9 views

Where to find a list of genes coding for protein in human

I have raw read counts extracted by htseq from STAR alignment I have both data with both Ensembl IDs and gene symbols, but I need only a latest list of protein coding genes in human; I googled but I ...
0
votes
0answers
8 views

How ambient pressure affects to body?

I’m a freediver. My lung shrinks when I getting down to the sea deeper and deeper by Boyle’s law. I learned how and why, but I actually didn’t get it. When I dive into the sea, the inside of my body ...
0
votes
0answers
8 views

what is minimal promoter and what is basal promoter?

what is minimal and basal promoter and what are their elements and what is the difference between the two?I'm confused. searched a lot, but didn't found any satisfactory answer. please help
2
votes
0answers
23 views

How much Oxygen can the Human body carry?

Basically - the title: How much Oxygen does a human body carry at a single point? What have I tried: A friend of mine has done some calculations and came up with the following numbers. Neither of us ...
1
vote
1answer
50 views

Balancing selection vs introgression?

Balancing selection can maintain polymorphisms in natural populations for extended periods of evolutionary time. However, in this paper, Dannemann et al. 2016 identify three archaic haplotypes in the ...
0
votes
0answers
12 views

Blood levels of cholesterol necessary for reversal of artherosclerosis?

It is claimed based on autopsies of starved humans/animals and cholesterol and dietary restriction studies in animals that atherosclerosis if cholesterol can be reversed to a degree, rather than just ...
-5
votes
0answers
18 views
8
votes
1answer
268 views

Identify this caterpillar

Could anyone try to help identify this caterpillar, there are loads of them all over my garden and I've got three of them in a makeshift caterpillar house. I've had them for about a week and they've ...
2
votes
1answer
39 views

How does taxonomy work? The case of the Avian Dinosaurs

I recently discovered that the class Aves (or Birds) has been renamed Avian Dinosaurs. My question is when this taxonomic denomination achieved the consensus of the scientific community and through ...
-1
votes
0answers
10 views

telophase II -male grasshopper [on hold]

how to identify telophase II in male grasshopper testis I used permanent slide, if not how to find stages of meiosis in male grasshopper testis
1
vote
2answers
35 views

What is the water and fat composition of the human brain?

Everywhere I look online says the brain is about 60% fat. But when it comes to water, I see numbers like 70-75%. One webpage even makes both those claims back to back! That doesn't make any sense. So ...
0
votes
1answer
146 views
-1
votes
0answers
19 views

Complementary DNA synthesis

Does the reverse transcriptase enzyme recognize thymine to synthesize the complementary strand of cDNA?
0
votes
0answers
23 views

Ligand-binding assays: IC50, EC50 and Kd

I am reviewing several MHC-peptide binding affinity predictors trained on IEDB data. Quantitative records for MHC class I allotypes come from a lot of different assays and, by extension, have ...
1
vote
0answers
47 views

Bioenergetics book

I already asked this question on the physics SE but redirected here: In the field of biophysics, it seems there is a subfield called "bioenergetics" about the processes of generating energy by ...
1
vote
1answer
26 views

Are these termites

Found a large number of these trapped between my window and the window frame. Are they termites? Location: Eastern Massachusetts, USA

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