2
votes
1answer
8 views

What do you see when your eyes are closed?

If you are in pitch black and you close your eyes, you sometimes can see strange shapes of various colors. A lot of the time these shapes and colors change as you observe them. This phenomenon still ...
0
votes
0answers
3 views

Is there an association between environmental and mutational robustness?

The robustness of a genotype is the ability of this genotype to resist (always produce the same phenotype) to various parameters such as mutations and environment. The ability of a genotype to resist ...
1
vote
0answers
5 views

How does Pothos grow in only water?

The popular potted plant, Pothos aureus (or Epipremnum aureum) is happy to grow in a jar, with only water, for years. How is this possible when other plants need at least Nitrogen, Phosphorus and ...
0
votes
0answers
2 views

Mutation-drift equilibrium and among loci variance in heterozygosity

At mutation-drift balance, the increased heterozygosity brought by new mutations is exactly equal to the loss of heterozygosity due to genetic drift. At equilibrium, the expected heterozygosity for a ...
1
vote
0answers
5 views

Can two Hfr strains of E. coli conjugate?

Genetics textbooks (and some internet searching) yield abundant examples of Hfr strains conjugating with F- cells, but these sources are surprisingly silent regarding the results of an Hfr ...
0
votes
0answers
8 views

What is this woodlouse doing?

I picked an apple from the ground, it was wet with dew and a woodlouse was stuck to it, with its back against the apple. When it got loose, it started flexing its "tail" like this for a while. Why?
0
votes
0answers
11 views

What are scientifically recommended safe substances for cockroach extermination?

What are some easily/readily available substances that have been scientifically proven to exterminate cockroaches? Moreover, what are the scientifically sanctioned, effective procedures? (There are ...
1
vote
0answers
15 views

Why does botulinum toxin seem to be more dangerous to humans than to other mammals?

Various mammals seem to get away with eating parts of carcasses that we would prefer to not even touch, and that we assume will make us sick. Because of that, I assume botulinum toxin is more ...
0
votes
0answers
7 views

Is stetoscope sound mono- or stereosound?

I am curious if the sound is monotonic. There are two things on my ears however. Is stetoscope sound mono- or stereosound?
4
votes
2answers
157 views

How does isopropyl alcohol disinfect less in higher concentration?

Isopropyl alcohol can be used as disinfectant. For increasing concentration of it in water, the effect as disinfectant increases, and then decreases again. Typical concentrations for use as ...
1
vote
0answers
11 views

What are the application areas of Pattern formation studies specific to biology?

I was reading about reaction-diffusion processes, morphogenesis concept by Alan Turing and works of Murray in describing pattern formation on animals etc. But one question which came to my mind was ...
0
votes
0answers
17 views

What are main animal origin antiseptics?

I started to think which are the main animal origin antiseptics to understand possible negative sides of these antiseptics. Antiseptic is a substance that inhibit bacterial growth both in vitro and ...
4
votes
1answer
42 views

Why dont we develop immunity against common cold?

We all suffer from common cold, and that, frequently. Why have we not developed immunity against it till now? By immunity I mean immunity as a species.
1
vote
1answer
23 views

Vitamins that could help “make us smarter”?

I was at Sprouts health store and saw a lot of vitamins/herbs that claimed to be "Study Aids" etc, so if there is any basis to it, where exactly does it hold truth? And are these supplements safe?
-1
votes
0answers
22 views

Is it possible to resurrect dead animal by using it's DNA?

My pet died yesterday by an accident. I'm feeling so sad, can't even sleep well. I tried to control myself and thought about many philosophical questions, but I can't get away from this sadness. ...
4
votes
1answer
77 views

Would oxygen levels be stable without photosynthesis?

I learned how the CO$_2$ cycle works in several biology classes, high school, elementary school, geology, and physics. Then today there was an article published in the NY Times claiming: ...it is ...
0
votes
0answers
21 views

Why do spiders have a leaf at the bottom of a piece of web?

I've lately seen a lot of instances where a leaf is dangling from a piece of web coming down off a tree. What purpose/s does this serve for the spider? Is it some sort of mechanism for the spider to ...
0
votes
0answers
27 views

Distance matrix with different length sequences

In a project we're doing (in python), we want to create a distance matrix for a phylogenetic tree with multiple, different length sequences. However, what we've seen so far (AlignIO in biopython, ...
3
votes
1answer
697 views

How the conjunctivitis virus spread just by seeing a person's eye who is infected

Conjunctivitis or 'pink eye'. I have a few questions on conjunctivitis. When I was suffering from conjunctivitis, my doctor advised me to wear sunglasses so that no one else gets infected. I ...
3
votes
1answer
27 views

How can I determine the purity of cells isolated from rat brains if I cannot use FACS, Immunohistochemistry or SEM anaysis?

Please help. I know how to isolate the different cells (astrocytes, other glial cells, neurons and synaptosomes) from brain tissue using a Ficoll-based separation but how do I determine the purity of ...
1
vote
1answer
26 views

How is it possible to even hope for an ebola epidemic of this current size to remain contained to a relatively small part of Africa?

As of 9/14/2014 at least 5347 cases of ebola have been identitied. Some estimates are much higher. While experts are sounding the alarm to try to get sufficient resources to contain the outbreak, some ...
1
vote
1answer
25 views

Determining and Differentiating specific ATPases

In respects to this certain ATPase transporter. What do i look for in respects to determining what specific kind it is out of: F-ATPases V-ATPases A-ATPases P-ATPases E-ATPases Im assuming that ...
5
votes
3answers
194 views

Books for beginners

I want to study biology. I have zero previous knowledge of biology but I know Physics, Chemistry and Maths. From which book should I start? I have heard about Campbell Biology, but it is very costly ...
1
vote
1answer
34 views

BLASTn vs ORF tools

Sequencing projects sequence one strand and call that the + strand and then extrapolate the sequence of the - strand. This means that sometimes the genomic sequence that you download from a database ...
0
votes
0answers
14 views

Immunomic Microarray

"One can measure two or more signals simultaneously determined by a single feature, i.e., epitope in immunomic microarray DNA microarrays measure one response value for each gene per sample; that ...
-1
votes
1answer
28 views

peptide MHC microarray

"The recent technology is peptide–MHC microarray or artificial antigen-presenting chip. In this technique, recombinant peptide–MHC complexes and co-stimulatory molecules are immobilized on a ...
1
vote
1answer
25 views

What is the physiological difference between cortisone and cortisol?

There is only hydrogen bond different. Cortisol is synthesized by our body, while cortisone is given to the patient. Why you cannot give cortisol directly to the patient? I think the reason is ...
2
votes
1answer
40 views

Did the Britons 100 years ago have different intestinal flora and fauna?

Note: this is not a question about history, but about human digestive system over time :) I know a lot of colleagues who traveled for business trips to India. All of them caught terrible diarrhea ...
0
votes
0answers
19 views

recombinant peptide MHC complex

What is recombinant peptide-MHC complex??? Recombinant DNA means "to bring together genetic material from multiple sources, creating sequences that would not otherwise be found in biological ...
4
votes
1answer
43 views

Why can't a Corn have 13 rows of seeds?

Every time before eating a corn, I count its lines. I would always find 12 or 14 rows of seeds but never 13. Is there any biological/scientific reason behind this?
1
vote
1answer
23 views

Is there any research on how accurately people can follow a beat?

I'm currently helping develop a rhythm game, and as part of the scoring system, I'd like to make scores and ranks based more on accurate pattern recognition rather than hitting notes very exactly on ...
2
votes
1answer
12 views

What is the Baculovirus and how does it help in research?

I was reading up about Biotechnology and the use of insects, and came across an interesting article about Insect Cell culture Techniques that specifically talked about the usage of the Baculovirus. If ...
0
votes
1answer
21 views

Regarding inherited fertility in animals

If an animal is fertile does it follow that both its parents of the same species (not necessarily the same species of the offspring)? Was it Mayer who said a fertile male and fertile female of two ...
3
votes
2answers
61 views

Transmembrane Protein Problem

Problem A transmembrane protein has 1000 aa. The 5th aa is found on the external side of the cell membrane. It interacts with the aqueous environment outside the cell. Amino acid 90 is inside the ...
6
votes
1answer
58 views

Fisher's Geometric Model for Dummies

Fisher's geometric model is still today one of the most important and fundamental model in evolutionary biology but it seems to me that most student in evolutionary biology don't really understand it ...
1
vote
0answers
18 views

3 end RNA seq library construction

I have tried to make cDNA libraries from FFPE tumor blocks (highly degraded RNA) using the 3' end RNA seq protocol provided by West lab. Here is the link for the same. ...
1
vote
1answer
27 views

Evolutionary support for parenting book “The happiest baby on the block”

The book by Dr Harvey Karp (MD) The Happiest Baby on the Block proposes that the duration of human gestation has evolved as a tradeoff between cranial size and development of the infant. He ...
-1
votes
1answer
35 views

Meiosis I or II [on hold]

Suppose an organism has 8 chromosomes. When the female and male organisms mate, how many chromosomes will the mother contribute to the offspring? Why?
0
votes
0answers
13 views

Definitive list of books across various fields in Biology? [on hold]

There have been a number of popular posts on StackOverflow where a list of popular (useful) books have been compiled on various programming languages or other topics. I wanted to know if there exists ...
0
votes
0answers
24 views

Sexual Reproduction [on hold]

The primary oocyte of a bird which has 80 autosomes and WZ sex chromosomes is going to divide. How many daughter cells and chromosomes are there in each cell at the end of meiosis I and II?
4
votes
1answer
39 views

How fast cancer cells divide, compared to normal cells

This question suggests that we have, on average, 50-70 billion cell divisions per day. I just read that cancer cells divide more often (therefore more prone to radiation). I am wondering, for a ...
6
votes
1answer
59 views

Where do lost membrane proteins go after exocytosis?

Exocytotic vesicles take away membrane proteins and glycocalyx on the cell's plasma membrane surface. When those vesicles are released into the interstitial fluid and wherever else, where do they go? ...
2
votes
1answer
11 views

epitope prediction/ mapping

B-CELL EPITOPE PREDICTION Regarding this article: "Such a molecule can be synthesized or, in case of a protein, its gene can be cloned into an expression vector."----- is a particular line in ...
2
votes
0answers
15 views

Regarding cellular self-destruction

I heard and read telomere 'health' or 'length' ( if that's right ) has alot to do with cell 'health'. If telomere 'abilities' are 'restored' to a 'healthier' status then the cell it is in functions as ...
1
vote
1answer
53 views

Can we influence evolution by teaching primates to control fire? Should we?

Most people with a strong interest in biology will have heard of Kanzi the Bonobo, the ape that has the wherewithal to collect fuel for a campfire and play pac-man. But is it conceivable to influence ...
4
votes
1answer
34 views

Why can't the immune system start at the mating time?

The immune system has a great role in our body. When foreign particles enter our body, the immune system can recognize and start defense mechanisms such as the complement system and others. But when ...
4
votes
2answers
803 views

Do biological facts determine when a human fetus is considered alive and human? [on hold]

I often hear or read this statement: "It's not a human, it's a fetus." In other words, some think a fetus is non-human until a certain point. And another similar statement: "The fetus isn't ...
1
vote
0answers
7 views

How does Temperature influences the rate of protein turnover?

Question How (quantitatively speaking) does temperature influences rate of turnover of transcription factors? Which protein? As I am not looking for any accurate number I am talking about an ...
4
votes
1answer
23 views

Effect of alcohol on parasites

I recently came across an article saying that fruit flies use alcohol to deter parasites. The researcher was quoted as saying there have not been any studies on the effect of human alcohol consumption ...
1
vote
1answer
17 views

aspartame in relation to generating methanol

So I posted another question with respects to methanol and aspartame in metabolism with respects to toxicity. So another question I have is "Why is aspartame used as a dietary component to generate ...

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