2
votes
0answers
89 views

How is color information transmitted from eye to brain?

Is it frequency-modualated or are different colors transmitted by different axons? I know that each ganglion cell is connected to multiple photoreceptors. How does it tell the brain which ...
2
votes
1answer
77 views

How many different smells can a human recognize?

How many different smells can a human recognize? If the space of smells is not discrete, how many dimensions it has (for example, the space of colors is three-dimensional).
2
votes
1answer
355 views

DNA degradation rate

Usually DNA sample manipulation is realized with an ice box at hand in order to avoid degradation, and also its storage is set at -20ºC. Nevertheless, DNA has been obtained from really ancient samples ...
0
votes
1answer
51 views

Looking for raw cell videos from a light microscope

First off, I'm not looking for online lectures. I am trying to find creative commons licensed videos of live cells moving around without annotation or anything extra. I would prefer a few minutes of ...
1
vote
2answers
89 views

what does sequences overlap indicate

what does it mean if different protein sequences overlap upon multiple alignment, are they the same, do they have a common ancestor, are they recombinants of each other and how does one go on to ...
1
vote
1answer
163 views

List of all reported bacteria

I would like to know were to download a table file with all reported bacteria and its corresponding PHYLUM, CLASS, ORDER and FAMILY. Basically, its the same table than this one from GOLD genomes but ...
3
votes
1answer
39 views

Erythroblastosis Foetalis

If Rh- mother has Rh+ baby, the mother can become sensitized during first pregnancy and then if subsequent fetuses are also Rh+, there can be eryhtroblastosis foetalis. I read that if mother is O- ...
-1
votes
1answer
59 views

bioinformatics /genomics [closed]

i am looking for likely truncation sites to prove recombination in sequences. i have 4 sequences. i believe one to be the "real sequence" and the other 3 to be recombinants caused by cleavage possibly ...
0
votes
1answer
83 views

Death because of no radio waves [closed]

I read somewhere that a man dies if he is isolated from natural electromagnetic fields and waves. (I imply fields of radio frequencies and below.) Is it true?
4
votes
4answers
144 views

Electronic laboratory notebook (ELN)

I have been using old style lab book for some time now but with increasing work on computer and storing sequencing results and gel pictures on computer it would be nice to have everything on computer ...
3
votes
1answer
31 views

Manufacturing toxoids

Toxoids produced by tetanus and diphtheria bacteria are detoxified with formaldehyde, yet their antigen properties remain. Source : Biological Science by Taylor What does formaldehyde do ?
3
votes
3answers
42 views

Immune reaction to “new” protein

I read in Bruce Alberts Molecular Biology of the cell : Normal mice,for example, cannot make an immune response against one of their own protein components of the complement system called C5. ...
3
votes
1answer
70 views

Thymus and maternal microchimerism

I read in Bruce Alberts Molecular Biology of The Cell : ....If,however,cells from one strain of mouse are introduced into a neonatal mouse of another strain , some of these cells survive for most ...
4
votes
3answers
208 views

Antigenic and non antigenic

Can any foreign molecule be non- antigenic ? Can any foreign peptide be non-antigenic ? What is the difference between an antigenic and a non-antigenic peptide ?
2
votes
2answers
54 views

How are T cells transported?

T cells are formed in bone marrow and mature in Thymus. How are they transported from bone marrow to thymus ? Through the lymph vessels ?
6
votes
1answer
630 views

Why don't we have hair on palms?

We have hair all over the body except palms. What is the biological reason behind this? Thanks
4
votes
2answers
94 views

The least complex animals with ability to dream

People can dream, dogs can dream, cats probably too when they are sleeping. What about other creatures? Can a bird dream? Do rats have dreams? Are there any studies about that kind of thing? What ...
3
votes
2answers
117 views

Which restriction enzyme would i use?

Plasmid pBr322 includes two genes that confer antibiotic resistance: a gene for ampicillin and a gene for tetracycline. The cutting site for the restriction enzyme BamH1 is in the middle pf the ...
7
votes
1answer
102 views

How much does a biological experiment to validate a gene function cost?

I am computer scientist working on machine learning methods applied to predicting missing Gene Ontology annotations. In many papers, I wrote that my computational methods are very useful to suggest ...
4
votes
2answers
228 views

How is membrane capacitance related to the increased speed of saltatory conduction?

Here is the original question which inspired my question. As explained by the answers there, the reason saltatory conduction in myelinated neurons is faster than non-myelinated conduction is because ...
3
votes
1answer
55 views

What is the best way to orally administer a water insoluble powdered drug to macaque monkeys?

They typically need to be given ~150mg, once a day, and it'll last for two weeks. The drug is very water insoluble, becomes almost like a paste, not suitable for tube feeding. And yes, this is for for ...
2
votes
4answers
336 views

How come most animals never seem to evolve over millenia?

People often say, including those with extensive knowledge in biology, that a certain species of animal will evolve in one way or another: 1.From changing environments. 2.Mutations. 3.Possibly even ...
2
votes
1answer
148 views

Why is cyanide poisonous?

I know cyanide inhibits complex IV in the electron transport chain, but I don't understand why this makes it so toxic. If cyanide is bound to the complex, can't the electrons just bypass it and ...
3
votes
3answers
118 views

Can humans be printed?

Is it possible to spray stem cells on fully grown skeleton to get fully grown humans? Currently, just read about recent advances, and wondered if something like this is possible.
2
votes
1answer
948 views

Identification - What kind of animal leaves these tracks?

I live in the suburbs of Washington DC where it recently snowed. I was admiring all of the tracks left behind by wildlife of all kinds when I came across these prints, that I was unable to recognize ...
2
votes
1answer
198 views

What are the visual, behavioral similarities and differences between Yellow Fever Mosquito (Aedes aegypti) and the Tiger Mosquito (Aedes albopictus)?

The Tiger and Yellow Fever Mosquito visually look very similar. Recognizing the difference is important for tracking and controlling the spread of Yellow Fever, Dengue fever and other diseases. ...
2
votes
2answers
563 views

Are there genetic similarity between humans and pigs that don't exist in chimps?

Chimps are our closer relative. Any genetic similarity between humans and chimps must exist on the common ancestor. Pig branch out sooner. So, any genetic similarity between humans and pigs must be ...
0
votes
2answers
163 views

Is there any genetic similarity that defy evolution theory?

For example, say species A is common ancestor of B, and C. Species B is a common ancestor of D and E. We would expect that there will be more genetic similarity between D and E than D and C. And ...
3
votes
1answer
83 views

When might an inhibitor of bacterial transformation be useful?

I am part of a project elucidating some structures that are required for bacterial transformation. We have the opportunity to screen inhibitors of the system to stop it from functioning. I am not a ...
2
votes
1answer
57 views

Mutation in pre-mRNA sequence

Has there any mutations been recorded which cause harmful effects due to change in the part of pre-mRNA responsible for proper m-RNA splicing ?
1
vote
2answers
256 views

Histidine - why essential for children?

Why is histidine an essential amino acid for children but not for adults ? What changes in the body occur which lead to the formation of histidine in adults but not in children ? What causes these ...
2
votes
3answers
54 views

Anti-antibodies for preventing transplant rejection

Transplanted organs from the donor are attacked by antibodies from the recepient. So can't we construct anti-antibodies and destroy specifically those antibodies which are causing the rejections ? ...
4
votes
4answers
239 views

Is there a PSI-BLAST for nucleotide sequences?

I understand that one can translate a nucleotide sequence and run PSI-BLAST on the protein (proteins if you take the 6 reading frames), but I'm looking for distant homology for bacterial small RNAs ...
1
vote
0answers
50 views

What is the cause of singularity in phase response curve of human sleep and bright light?

I have no background in science as I am a computer programmer, but I am trying to get information on phase response curves, human sleep and exposure to bright light as I am trying to get to grips with ...
4
votes
1answer
101 views

pfu Turbo DNA polymerase AD

What is the duration (Life") of pfu turbo DNA polymerase AD. I am trying o Amplification a 3.3kb fragment and the PCR schedule is 6 hours long. The manufacturers notes just specify that its activity ...
3
votes
1answer
76 views

How can this bird be identified? Can someone please identify this bird?

These photographs have been taken in Warora, India. Could someone please help identify this bird?
4
votes
1answer
63 views

What evidence is there on the medical effects of circumcision?

If this is the wrong place to post this question, then I will delete it and post it were it belongs. I have heard many conflicting things about circumcision. I have heard that it reduces the rate of ...
8
votes
2answers
381 views

More variation in proteins than genes. Why?

The Genome of a cell or organism is the same as that of the entire organism. However, the proteome of an organism is much greater than that of each cell (unless the organism is unicellular). How do ...
7
votes
4answers
138 views

Organisms as potential Bio-Weapons?

Question: Given that with genetic engineering we can customize organisms as bio-weapons. Which species have the most worrying potential to be weaponized for mass destruction? Background: ...
0
votes
1answer
52 views

How do transplanted stem cells find their way to bone marrow?

Miraculously, transplanted stem cells find their way to the bone marrow missing the stem cells. How do they achieve this?
-4
votes
1answer
75 views

Basic definitions for biology terminology [closed]

I am currently writing a mathematical biology paper, however it is very hard for me to follow the existing literature due to specialized terms. I have tried googling but most explanations are very ...
1
vote
1answer
43 views

Is it possible to use microalgae to produce food and live on it?

i got know microalgea can benifit a lot and it has not less protein and starch , and grows quickly, require less so is it possible to use them for producing food (replace rice and wheat) and live on ...
1
vote
1answer
150 views

What type of mutation causes Progeria?

I'm doing my High School biology final on Progeria, and am wondering what type of mutation causes this disease. I know that the LMNA gene codes for the "prelamin A" protein, and that protein contains ...
3
votes
1answer
129 views

What is the most genetically simple organism except viruses?

What is the most genetically simple organism (except viruses) on this planet? By simple I mean the least number of genes.
0
votes
2answers
88 views

Identifying the inheritance pattern

...
2
votes
1answer
28 views

Difference vector target and genomic target

In Pfu turbo DNA Polymerase AD information sheet (and possibly in many other) different amplification targets are divided in Genomic DNA targets, Vector DNA targets and cDNAs. What is the difference ...
5
votes
1answer
149 views

What about 23andMe's SNP test gives it such bad efficacy as a diagnostic tool?

The recent news about the FDA stopping the google backed 23andMe service selling any more kits got me thinking. I understand the company may have been selling it as a medical tool prematurely, but ...
6
votes
1answer
86 views

Has Colony Collapse Disorder (or its equivalent) been noted in other species?

Colony Collapse Disorder is a well studied phenomenon relating to the decline of bee populations - has this disorder, or its equivalent, been observed in other colony-based species?
0
votes
1answer
169 views

Static in limbs

I have noticed that while sitting in the Sukhasan posture(picture below) for a long time, my feet suddenly become all stiff and i am unable to move it. What I deduce from the experience is that it is ...
4
votes
0answers
230 views

Statistical Coupling Analysis (SCA) to identify coevolved residues: use of ICA [closed]

We've begun to try out the SCA Matlab toolbox (latest version) downloaded from Dr. Rama Ranganathan's website, and, following the included tutorials, would like to apply it to our protein family. The ...

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