All Questions

0
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0answers
14 views

Authoritative online dictionary of immunology terms?

Is there an authoritative and peer-reviewed online dictionary for immunology? I am referring specifically to the terms you find on papers, such as standard abbreviations for molecules, genes, mouse ...
1
vote
1answer
31 views

What are some difficulties animals had to overcome to reproduce on land?

This is for AP Biology, but the assigned textbook chapter doesn't contain any information about the question. What are some difficulties animals had to overcome to reproduce on land? Some ...
0
votes
1answer
27 views

Safe level of chlorine in water [on hold]

Chlorine is usually mixed in water to make it safe for consumption. What is a safe quantity of chlorine that can be consumed? What are the side effects of chlorine and does this include hair loss? ...
-6
votes
0answers
42 views

Frequent male nocturnal emission [closed]

What would cause someone to have these occur frequently?
1
vote
1answer
18 views

Incestual Reproduction in Animals

I'm quite curious on how animals view incestual pairings. Given there are enough mates around, i have quite observed that most females (subjects are dogs, cats, pigeons and chickens) would go choose ...
1
vote
0answers
26 views

What triggers the formation of biofilm? [closed]

How does a bacterial biofilm form? In general, not specific to a certain industry or type of surface. I know how it forms; I understand reversible attachment, irreversible attachment, growth, ...
1
vote
1answer
22 views

The suspended cat clavicle

I know the clavicle of the cat floats freely as opposed to be attached as in humans. This is supposed to allow them to be able to squeeze through spaces, according to a quick google search. But how ...
2
votes
1answer
23 views

Which virus capsids consist of only one type of capsid protein?

The Tobacco Mosaic Virus (TMV) capsid consists of many copies of one protein (http://www.rcsb.org/pdb/101/motm.do?momID=109). Which other viral capsids consist of only one kind of coat protein? Does ...
8
votes
4answers
1k views

Do human cells contain only one copy of the genome?

Does each cell contain only a single copy of its genome? Or are there ever 'extra' copies present. Reason behind question: Wondering whether gene mutations could be corrected by referencing a ...
3
votes
1answer
33 views

Why did many odd-toed ungulates become extinct?

There were a lot of odd-toed ungulate animals in the ancient times but now just few of them survived. What is the reason for that?
2
votes
2answers
22 views

Does prolonged exposure to low pitch but low volume noise affect hearing or stress?

This is similar to another post but not quite the same... At work, our ventilation system produces a constant low pitched sound - like a rumble - as well as the sound of air blowing through the vents. ...
1
vote
2answers
18 views

During bridge amplification of DNA sequences, why aren't sequences amplified in both orientations?

During bridge amplification, when sequences attached to adapters on the surface form "bridges" and are replicated, it seems like sequences with either end attached to the surface will be created. For ...
1
vote
0answers
18 views

How to define the four haematological subgroup? [on hold]

There are four main haematological subgroups, cross-reactive material-positive (crm+), cross-reactive material-negative (crm-), crm-reduced (crmR) and inhibitor patients. But what kind of substance ...
1
vote
1answer
20 views

Does the Peptide bond produce water in our organism?

According to Wikipedia http://en.wikipedia.org/wiki/Peptide_bond , when a peptide bond is made a water molecule is released as a secondary product. So, my question is simple (perhaps silly). ...
0
votes
1answer
42 views

Calculating number of amino acids in mRNA

Assuming there were 20 different amino acids and less than 40 types of different tRNAs found in this alien organism. How many amino acids would be found in the translational product of a ...
3
votes
1answer
29 views

Effect of recombination on the rate of loss of genetic variation

Following up from this question: Does recombination increase the additive genetic variance for fitness? (I'm thinking about the evolution of additive genetic variance and differences between the sex ...
4
votes
1answer
41 views

Publicly available resources for learning metagenomics

We are starting a metagenomics project in our research group to study microbiota in the respiratory tract. Since the are no books yet about metagenomics, seems reading some reviews and online ...
0
votes
1answer
14 views

Human longevity interventions ranked by effectiveness [closed]

Generally living longer and with a better quality of life is considered a good thing, if not for ourselves then for our family and friends who care about us. Some factors that influence human ...
0
votes
0answers
34 views

Why do carnivorous animals have odd numbered fingers while herbivorous animals have even numbered fingers? [closed]

What principle they based on? And is different finger' numbers have different function ?
1
vote
0answers
43 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
17 views

What does it mean for RNA polymerase to “escape” the promoter? [closed]

what the answer for What does it mean for RNA polymerase to “escape” the promoter?
6
votes
6answers
3k views

What is the use of eye banks, if eyeball transplants do not exist at present?

Corneas are donated and transplanted, but not the eyeball. I don't understand. What is the purpose of donating a cornea without an eyeball to a blind person?
1
vote
0answers
7 views

small RNA bioanalyzer traces showing miRNA enrichment for sRNA-seq

I am bioinformatician trying to support some small RNA-seq experiments. All bioanalyzer traces that I have seen for RNA at the small RNA range show at peak at 22. But probably it depends on the ...
1
vote
0answers
7 views

Predictive Single Nucleotide Polymorphisms (SNPs) for Bipolar Disorder

Are there any validated SNPs that are either predictive of developing bipolar spectrum disorder or are associated with its pathophysiology?
7
votes
2answers
330 views

Can we determine a person's age by dating methods or other means?

There are many sports restricted to players of a certain age (e.g. 16 and under, 18 and under, etc.) What if a person is older and fakes his birth certificate to say that he is younger? Is there any ...
1
vote
1answer
31 views

Why are there no marine birds?

Walking by the lake and watching the ducks the other day a thought struck me; there are lots of aquatic birds but all remain at least somewhat terrestrial, nesting on land. Why is it that no birds ...
0
votes
0answers
19 views

What would a human body do with an excess of stem cells? [closed]

This question STEMS (WOO starting right off with the puns) from an lack of understanding of stem cells. My naivety tells me that when a stem cell is introduced to the body, "SOMETHING" tells that cell ...
-1
votes
0answers
23 views

Types of protectants for NSAIDs? [closed]

Coating drugs or protectants. I think possible types intestinal protectants such as Laxative and Cathartic skin protectants (those supporting the elasticity of the skin) What other types of ...
0
votes
2answers
42 views

Are Purkinje Action Potentials Neuronal and Cardiac?

I first thought that action potentials of His-bundle i.e. Purkinje fibers are Cardiac. However, I started to think that this is not enough. I think now that they are neuronal and cardiac. My ...
5
votes
2answers
34 views

How to identify genes required for biofilm formation

This is just a homework question: Q: Let’s assume that there is an unknown set of E. coli genes that are required for biofilm formation. Describe a genetic experiment you could perform to try to ...
2
votes
0answers
23 views

What is the biological basis of “energy” that extraverted humans draw from social engagements and introverts expend?

This question is related to this question about introverts becoming exhausted after extended social events on cognitive sciences stack exchange. As I read more on the topic of human ...
7
votes
2answers
1k views

Can human organs be transplanted indefinitely?

I watched this movie, where they rented hearts to people for a year. I wonder if it is possible to transplant a heart indefinitely from person to person, or does the heart have a lifetime? So, do ...
1
vote
2answers
24 views

C.elegans and antioxidants

How would you test the effect of antioxidants on C.elegans lifespan? Is this done through feeding E.coli with antioxidants and then C.elegans with E.coli, or is there another method?
3
votes
1answer
21 views

At which temperature is the Tick-Borne Encephalitis Virus destroyed?

At which temperature is the Tick-Borne Encephalitis Virus destroyed? If there is no data specifically for TBEV, is there any data for typical temperatures at which other Flaviviruses / Flaviviridae / ...
3
votes
2answers
321 views

Do all Gram negative bacteria cause septic shock?

Do all Gram negative bacteria cause septic shock? If they don't could they if you attacked them with an antibiotic that could lyse the cell? For example any antibiotic that attacks the cell wall, ...
1
vote
0answers
35 views

Phage base Biosensor

What kind of biosensor is made by Phages? I need a list of published paper that used Phages for make LCR(inductance (L), capacitance (C), and resistance (R) of a component) biosensor for detection. ...
2
votes
0answers
48 views

What proportion of salt in water would make it not dehydrate nor hydrate someone?

Drinking sea water can be deadly as it contains too much salt, basically de-hydrating the body. Normal tap water contains little salt and is good for re-hydration. My question: How much salt needs to ...
0
votes
1answer
40 views

How to determine externally that a whale is a mammal?

Mammals have external qualifying characteristics like body hair, ear pinna, etc. But a whale has none of that. So, can it be identified as a mammal just by external observations?
6
votes
3answers
87 views

Are there any known mutual symbiotic relationships that has more than two agents?

We are all familiar with the examples of symbiotic relationships in nature consisting of two agents, like lichen or the co-evolvement between certain birds and flowering plants. Do we know of any ...
3
votes
1answer
50 views

How does rate of evolution/innovation scale with population size?

I understand that there will be many other factors that affect rate of evolution/innovation. However, other things being equal, how will the rate of evolution vary between two populations of different ...
2
votes
0answers
27 views

Rosemary room temperature at winter

I consistently read in non-scientific resources that I have to put my rosemary to low temperature (about 10°C) in winter (unless I don't want it to freeze). I googled, but I fail to find a scientific ...
-2
votes
0answers
40 views

Extant Bipedal Primates

How many extant bipedal primates are known? I got one answer, I believe, after searching Google with the following search string: ...
3
votes
1answer
116 views

Do wolves bury food like dogs?

Many breeds of domestic dogs seem to like burying food, presumably in preparation for leaner times. Assuming that dogs evolved from animals similar to the modern wolves through a mix of natural and ...
-2
votes
0answers
18 views

left to right hand eidetic memory affection [closed]

If a child who was left handed is made right handed, will it affect his eidetic memory ? I need to know please. No information from other sources. I tried
0
votes
0answers
24 views

Would a 3d monitor reduce eye strain from daily computer work? [closed]

I'm really not sure which SE community to post this to, but it seems most appropriate here... I work as a web developer. For 8-12 hours per day I stare at code 12 inches in front of my face. Beyond ...
8
votes
2answers
92 views

If human eyes watch an area, what's the shape of its capturing shape? Rectangular? Half spherical?

A normal camera can capture a rectangular image. If human eyes watch an area, what's the shape of the captured region? Rectangular? Half-spherical?
1
vote
0answers
21 views

How does proximal centriole of human sperm function?

I've read that the human's unfertilized oocyte ( stuck at metaphase 2 of meiosis ) lacks centrioles and that it completes meiosis 2 after fertilization as sperm gives its proximal centriole. Then what ...
0
votes
0answers
28 views

How do neural pathways in the thalamus filter incoming information? [closed]

Neural pathways in the thalamus pass relevant information into the conscious parts of brain, while it filters out other irrelevant information. How does thalamic filtering work?
2
votes
1answer
41 views

what the best E-value cutoff in the miRNA homology search

I'm trying to use miRBase database to annotate some microRNA sequences in length 22-24bp. I highly appreciate if someone let me know whether I should do this BLAST against mature miRNA or stem-loop ...
1
vote
0answers
25 views

Loss in DNA band size extracted from polyacrylamide gel

I'm using cDNA AFLP teq.. I extracted 670 bp band from polyacrylamide (urea) gel and I have amplified with PCR but on agarose gel it stops at nearly 350 bp.it happened for most of other bands before. ...

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