10
votes
1answer
1k views

What kind of memory is “keyboard/keypad memory”?

I work in IT and I have observed many people who cannot remember their iPhone passwords or computer passwords off the top of their head. However, if presented with a keyboard or a phone with a ...
1
vote
1answer
94 views

Risks in bacterial phage therapy

I just finished reading J. Craig Venter's book Life at the Speed of Light: From the Double Helix to the Dawn of Digital Life. The book is a little over a year old now, and Venter has an optimistic ...
2
votes
2answers
393 views

What is “theae folium”?

I wanted to buy black tea at a pharmacy and the pharmacist told me that russian tea is actually black tea so I bought it instead.It's made out of theae folium leaves and for some reason I can't find ...
3
votes
3answers
471 views

Looking for good reference book in molecular biology [closed]

I am starting to work in molecular biology/ molecular genetic and I am looking for a really good book containing the main concepts and mostly the more recent techniques. I would be interested in a ...
5
votes
2answers
233 views

How does a virus reach its host, it is always passive? [closed]

We know that viruses are non motile and cannot metabolise, and that it enters the host cells via binding to the receptors. But how exactly it reaches the host (that is, how it go from the ...
4
votes
1answer
124 views

Insect Identification - Black Cicada

I came across a black cicada in northwest Missouri last week. I am only familiar with brown cicadas. What makes this black one different? Is it a different species, or do the brown cicadas change ...
2
votes
1answer
48 views

In protein-protein interactions what is the difference between a binding site and an interface?

I see binding site and interface used almost interchangeably in the literature, but I'm not sure if it is exactly the same thing or not - what is the difference?
5
votes
1answer
122 views

How do I know which alleles the parents have?

I have the following assignment where I am to look at the "tree" (not sure the english word) and assign whether or not they can be autosomal dominant or recessive as well whether they can be X-linked ...
6
votes
1answer
66 views

Comparison of gene expression time series in vitro and in vivo

I have to analyse two datasets consisting of time-series measurements of gene expression. One set are in vivo data from the expression profiles obtained between a few days before birth to several days ...
2
votes
2answers
325 views

A question on glycolysis

In the first step of glycolysis, the glucose ring is phosphorylated. Phosphorylation is the process of adding a phosphate group to a molecule derived from ATP. As a result, at this point in ...
3
votes
4answers
1k views

Are there any papers arguing against vaccination in French? [closed]

Disclaimer: This question is NOT about challenging the safety or efficacy of vaccines. It is only asking for tips on providing credible references that may show harmful effects of vaccination, if any. ...
3
votes
1answer
106 views

Why is it difficult to bend the waist while keeping the knees straight?

It's easy to keep your legs straight when you're standing up or laying flat on your back, but as soon as you try to sit up or bend down, you need to bend your knees as well as your waist. (Try it. ...
6
votes
1answer
77 views

How pronounced is the difference if we would change the running direction for runners?

I was jogging when I asked myself this question: In running contests the standard running direction is counterclockwise; I also believe to remember that the regulation is very old (right back to the ...
5
votes
1answer
229 views

Is there a protocol for freezing and thawing Bacillus subtilis cells?

There is a book that says to store Bacillus spores in 50% glycerol at -70 degrees Celsius (doesn't mention if the 50% is final concentration or not). But from what I know, the cells themselves can be ...
4
votes
1answer
37 views

Tree identification from dried branch

I found a very interesting branch last week, and have been trying to identify it but cannot seem to find the answer. If anyone has any suggestion, I would be grateful. I found it near the forest, ...
5
votes
1answer
46 views

Can nociceptors die because of too much mechanical stress?

In martial art people hit their body (e.g., with small bean bags) to become more insensitive to pain. Can the sensory neurons die during this procedure? I think this is just an urban legend. Instead, ...
-1
votes
2answers
61 views

Primers for human tissue? [closed]

If I wanted to examine human tissue samples, such as hair, blood, fingernails, etc, for their DNA, what primers would I use for the amplification of the DNA when extracted(PCR)? edit: To look at the ...
18
votes
2answers
303 views

Was the recent “conservation hunt” of a black rhino supported by science?

CNN recently covered a sanctioned black rhino hunt in Namibia by Texan Corey Knowlton, who bid US$350,000 for the license. In the story, he claims that the hunt was actually supporting conservation of ...
3
votes
2answers
153 views

Restriction sites

I would like to know: how many restriction sites does a restriction enzyme use on a DNA molecule? In other words: If a sequence on a plasmid contains the following bases: ATTGCAGTCTG and I want ...
5
votes
1answer
589 views

What is this Tree?

What is this plant? Location: Bangalore, India
2
votes
1answer
32 views

Do females retain oogonia after puberty?

Oogonia are the precursors of oocytes in females present during embryonic development. I was wondering whether these stem cells are still present in the ovaria at puberty?
12
votes
1answer
860 views

Species ID: Buckyball-like fungus

Previous research A friend of mine shared a link of some beautiful fungi: http://imgur.com/a/Dii3H. I was intrigued by the curious critter below -- it seems to have honed the power of buckyball ...
0
votes
1answer
57 views

What are these pathways called in Biology?

Considering the pentose phosphate pathway and the sulfate reduction pathway in bacteria; What are these types of reactions called in biology? Bio degradation reactions or bio transformation reactions ...
5
votes
2answers
64 views

What ways are there to determine how big genera are?

I want to look at genera as a whole, across the animal kingdom to determine the range of sizes of genera. I have examined species richness and genetic diversity (pairwise distance from sequence data ...
7
votes
3answers
142 views

How is genetic speciation defined?

What determines speciation at a molecular level? At what point does a scientist determine two lineages are different enough to be considered separate species? Does it have a margin of error?
2
votes
1answer
327 views

What does the energy in an energy pyramid represent?

Suppose the energy at the second trophic level as given in an energy pyramid is 100 kcal per square metre. It could mean either of the two following things: 100 kcal is the energy this primary ...
8
votes
2answers
382 views

What's the name of this flower?

I photographed this flower in Central Europe. I looked in online databases but can't really identify the actual flower, since there are so many that look quite similar. Can you help me? What's the ...
3
votes
1answer
243 views

Is the amount of dNTPs rate limiting for very long PCR products?

I'm using the Q5 system and I'm PCRing a product that will have a final length of around 9500 bases. I have noticed that the product is there but very faint. The primer seems to be used up. So my ...
0
votes
0answers
48 views

Solidification of coconut water

At first, the coconut is filled with liquid endosperm. Later when it ripens, the outer layers form brown fibrous covering, and the inner solid layer turns brown and hardens. Within that, a white layer ...
2
votes
2answers
724 views

Why do we do nested PCR?

Wikipedia: Nested polymerase chain reaction (Nested PCR) is a modification of polymerase chain reaction intended to reduce non-specific binding in products due to the amplification of ...
1
vote
0answers
42 views

Why Pan_troglodytes-2.1.3 Assembly renamed as a Pre in ENSEMBL?

I began working with panTro3 assembly of the UCSC. This assembly corresponds to CGSC Build 2.1.3. See here: https://genome.ucsc.edu/FAQ/FAQreleases.html Now, I have to cross annotations with ENSEMBL (...
2
votes
1answer
448 views

Plasmid: Empty Backbone?

When searching for a plasmid on Addgene what does it mean if it is said to be an "empty backbone"? Why would one want an empty backbone?
1
vote
2answers
31 views

T7 Tagging Next to Met

Will a T7 tag still work if it is placed next to a start codon? Meaning, will it still work with a Met attached to it in the amino acid sequence? Thank you!
-4
votes
1answer
519 views

How does visual sexual arousal work between the eyes, brain, and genitals/gonads? [closed]

When many people look at sexual images, they often can become sexually aroused, including full genital arousal, and feel urges, known more often used as "horny" as slang/urban usage. How does this ...
2
votes
1answer
86 views

T7 Tagging in Synthetic Biology

What is a T7 tag and can if be used to purify synthesized proteins? Is it charge based like a His tag?
1
vote
1answer
107 views

Does homeopathic or herbal treatment of cancer have any scientific recognition?

Even though we have a very high tech society, cancer is still a serious issue. We humans still are not entirely capable of fighting cancer. Radiation and chemotherapy are still considered the best ...
2
votes
1answer
90 views

Do both Carbamazepinum and Lamotriginum increase glutamate threshold?

I have in my notes that: Carbamazepinum increases threshold for glutamate Lamotriginum delays release of glutamic acid I would like to simplify these sentences into a single line. I would like to ...
3
votes
1answer
181 views

Skin color explanation?

I do not understand how skin color in humans work, even after taking a basic genetics course and reading some on wikipedia. From what I understand, skin is color based on multiple genes that control ...
2
votes
2answers
312 views

What are multicell spheroids?

I'm from a maths background and I'm doing some research on mathematical models of cancer. I've come across alot of literature mentioning "multicell spheroids" in the context of avascular tumours. I ...
2
votes
2answers
110 views

Recessiveness of allele for protection of organism

Heterozygous organisms profit from pairs of gene alleles. Harmful alleles when being recessive can be carried without any harm for the organism. Only when two harmful recessive alleles form a gene the ...
24
votes
2answers
4k views

Why does an electrical shock freeze up muscles?

Why is it when someone comes into contact with an electrical supply that their body freezes up and is unable to move away from the electrical source? Can someone explain this through a physiological ...
0
votes
1answer
29 views

Factors on which one compound transforming to another compound depend [closed]

Considering the Metabolic Pathway: http://www.genome.jp/kegg-bin/show_module?M00166 Consider the reaction R01523(the very first reaction). How is it possible to know that the compound C00199(D-...
5
votes
2answers
449 views

Why cannot there be multiple sources for same species origins?

We often associate Africa as the geographical location of the origin of humans. Why cannot there exist multiple geographic locations of origin (given same environmental conditions)? The same ...
15
votes
2answers
415 views

Is the human biological clock genetically programmed or learnt?

Argument favouring learning: A newborn sleeps for 20-22 hours. But overtime (s)he learns to focus sleeping time to night time, according to his or her needs and family needs. Some sleep from 1 am to 7 ...
1
vote
1answer
34 views

18S rRNA sequence

I have this phenomenon that the human 18S rRNA reverse transcribed with polydT oligos serve as faithful RTPCR normalizers, tested with better known house keepers. I want to know what I'm amplifying ...
5
votes
1answer
65 views

How to seek for available genetic data relevant to ecology and evolution?

I had a quick look online. There seems to exist many different website of database archiving. Some data might be free of charge while some others might not be. I found things such as Dryad, TreeBase, ...
3
votes
3answers
880 views

Where does the term “cos site” come from?

The word cosmid is derived from cos sites of lambda phages. Why are cos sites called cos sites? What does this "cos" refer to?
1
vote
1answer
59 views

Can sugar be absorbed orally within seconds? [duplicate]

Whenever I feel a little light headed or tired, it helps to eat something sweet. Specifically, simply chewing or sucking on a sweet seems to aleviate the symptoms within a matter of seconds and then ...
0
votes
1answer
41 views

Is missing Q wave characteristic for Wolff-Parkinson-White Syndrome?

No my study books says about that no Q waves in WPW syndrome. They are about wide QRS complex often however. I heard today that the characteristic property of WPW is often a missing Q wave, like here ...
2
votes
1answer
55 views

Evolution and Phenotypes.

This may be better suited for the English language SE, but When discussing evolutionary changes in species is it proper to refer to their phenotypes? In this context: "Imagine if a cow did not ...

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