-1
votes
1answer
129 views

What do the names of Immunoglobulin subtypes mean? [closed]

What is the exact meaning and full form of IgM IgG IgA etc? What is the rationale behind the names of the isotypes, if there is one? For example, what does "M" mean in IgM?
0
votes
0answers
76 views

Is there an organism which is “The Opposite of Hydra”?

My understanding is that if hydra is cut into pieces, each piece can evolve into a new hydra. What I'm looking for is whether there exists an organism with a this property reversed, that is, if two or ...
1
vote
0answers
19 views

How much oil you can get from a dead animal

This is purely speculative, but is there a formula to calculate how much oil you can get from 1 Kg of biomass? I've seen bioreactors in farms where they put dung, vegetable scraps, and all bio scraps,...
0
votes
1answer
37 views

Bioinformatics - DNA binding, sequence-specific protein data

I am a computer scientist and we are working on protein function prediction algorithms. Right now, we would like to examine protein-DNA binding properties computationaly. For this, we would make use ...
0
votes
0answers
20 views

What does it mean a “H4K20me1 has a diffuse profile”?

From the paper: H2A.Z is representative of localized signals. H4K20me1 shows the typical behavior of chromatin modifications with a diffuse profile. What does it mean a 'diffuse profile'? Does ...
0
votes
0answers
18 views

Peak calling for TF and histone modification

I was viewing different methods for peak calling and came across two quite similar concepts but still different methods: MACS and SICER. The main difference is that SICER uses nonoverlapping sliding ...
2
votes
2answers
303 views

In which phenomena does one gene pair hide the effect of other unit?

This question was asken in an exam, The answer they are saying is "Epistasis". But I think "Dominance" fits better, because it is not mentioned whether genes of same allele are to be considered or ...
1
vote
0answers
31 views

Can anyone ID this ant queen species?

It was found in Hong Kong! Below are a few basic information: Place: Hong Kong Habitat: Forest. I live very close to a mountain with lots of forestation. Where Collected: Found it in my window slit ...
2
votes
0answers
18 views

Partial Contribution By One Parent

For flowering plants, what might cause the genome size of offspring from a cross between 2 diploid parent of differing genome size to reflect only a partial contribution by the larger genome size ...
2
votes
0answers
36 views

Can ' functional' stress 'forced upon' a cell actually cause cell mutations when they divide and reproduce?

If a group of cells are forced to go beyond their regular biological parameters that they should be under given ' healthy' functioning and while existing in these stressed states some of the cells ...
8
votes
1answer
105 views

Why would a venus fly traps mouth that's still “chewing” die?

A venus fly trap produces leaves that act like traps for insects. A trapped insect is digested over several days. The trap then opens again to catch another insect. These traps regularly die off. ...
1
vote
1answer
38 views

Methylation Data for Erythrocytes (Red Blood Cells)?

Why is it that white blood cells (leukocytes) are highly characterized in DNA methylation pure cell line profiling, but I can't find any profiles of red blood cells (erythrocytes)? Is blood considered ...
0
votes
0answers
37 views

Nature vs Nurture in Rooster mating dance: Are roosters lame dancers because they never learned any better?

I've seen, read about, or heard several avian courtship dances, flights, songs, and other rituals. They are general very impressive, fancy, and beautiful. Roosters, by comparison, are quite lame. The ...
0
votes
1answer
96 views

Why Do we close our eyes while sneezing?

Google says germs may fall on eyes from our sneeze but it happens all the time . Also it says it a part of contraction. What may happen if we sneezing wirh our eyes open ?
1
vote
0answers
27 views

can the regeneration mechanism be used in humans that of lizards?

how lizards grow their tail again like is there any mechanism or specific protein which helps them to regrow their tail? can the mechanism of regeneration be used in humans to regenerate our limbs is ...
0
votes
0answers
22 views

Is it better to eat something that is more or less related to humans?

My question is, would it be better to eat something like a sea cucumber or would be it better to eat a chimpanzee? Maybe this isn't a dichotic answer. Is it better to eat something in between, like ...
1
vote
1answer
85 views

What does NaOH do for the plating of Bacillus subtilis?

A book called Molecular Biological Methods for Bacillus called for plating Bacillus subtilis cells on LB-agar plates with the following components: A general-purpose medium containing per litre: ...
4
votes
1answer
86 views

Identifying flying insect from northern Poland / Baltic Sea area

Found during this year vacations at Baltic Sea (northern parts of Poland): I don't have a picture containing other object, for size verification, but I'd say, that it was 3-4 cm long. There were ...
2
votes
0answers
26 views

transitional mutation, repair mechanism

I have read an answer to a question about dna repair during and after replication. But how is dna repaired if a deamination of of 5-methylcytosine happens? How does a repair mechanism identify which ...
3
votes
0answers
82 views

Did I just watch a spider die?

So I'm sitting in my office and all of a sudden a small spider is gliding down on a web string from the ceiling, right in front of my eyes, and down onto my desk. It proceeds to make a few awkward ...
2
votes
1answer
113 views

How does the embryo inside a shelled egg get oxygen?

If I'm not mistaken a typical animal in the womb will get oxygen via the umbilical cord from the mother. Thus allowing it to "breathe" in a liquid environment. I thought maybe shells are permeable and ...
1
vote
1answer
47 views

Is galvinoxyl antioxidant assay possible using NMR spectroscopy?

I would like to perform an antioxidant assay using the galvinoxyl protocol. The protocol states that we need EPR spectroscopy, but only NMR spectroscopy is available at my institution. Is there an ...
1
vote
1answer
27 views

what is the effect of temperature and carbondioxide on the opening and closing of stomata?

I am teaching biology in an academy. The question which I had asked above had been raised by on of my students. I tried my level best to search out the answer to this question but I could not find the ...
4
votes
1answer
125 views

How to know the gestation time of pregnant mice?

In lab mice I wish to establish how many weeks my animals are into their pregnancy. Is there some way?
2
votes
1answer
36 views

Trial pre-registration service that accepts non-clinical trials, or specifically ecology?

I'm in the early stages of designing a trial in ecology. I'm interested in pre-registering the trial, as suggested here. My concern is that all of the registries (that I can find) deal specifically ...
1
vote
0answers
39 views

Seeing through the rain

This question leads me to wonder about seeing in and through rain. From visual point of view, rain is light-bending droplets moving downwards, unformly in steady rain, less uniformly if there's ...
1
vote
1answer
68 views

Is T7 promotor leaky in DH5 alpha?

In my experiment I found that a GFP gene under T7 promotor in high copy number pTAC-2 vector is showing green fluorescence producing colonies of DH5 alpha under UV light. what could be the possible ...
2
votes
2answers
40 views

Are gizzard muscles voluntary or involuntary?

I started raising chickens this year. They have amazing appetites, and I often wonder what eating is like for them. They have no teeth, so they don't chew their food as they eat it. They do seem to ...
0
votes
0answers
21 views

What is the decision making process when a bird builds a nest?

I have been watching The Life of Birds and I am rather startled by the ingenuity some birds show in building their nests. For instance, one species built a dummy nest on top with a secret entrance ...
0
votes
1answer
92 views

Nature of Dengue Fever Genetic Material

Once the genetic material for Dengue Fever is inserted into the human DNA, would the Dengue Fever molecular material be in the form of its own isolated DNA fragment or will it be inserted directly ...
0
votes
0answers
53 views

What options are there to consume water and can you survive on them alone?

I thought about this a while, i can think of several ways, but i am not sure if there are other options and if you can survive on them alone withou dying of dehydration (lets ignore other problems ...
1
vote
1answer
58 views

Rattlesnakes developing stronger venom

I have heard that rattlesnakes are developing stronger venoms causing more people each year to die from rattlesnake bites. But why would a snake that is already very venomous need to develop stronger ...
5
votes
3answers
188 views

Why does nature use a 4-level system (DNA) to encode information?

First, I am not a biologist, so this question might be naive: All of our information processing and storing is based on 2-level logic, bits with 0 and 1. Now, DNA stores the information in a 4-level ...
1
vote
0answers
156 views

Evolution of a Population

Scientists observe a newly established population of sexually reproducing plants growing on the shore of a small island. An observable trait of the plant has two possible phenotypes. It is determined ...
1
vote
1answer
400 views

Hardy-Weinberg Equilibrium Question

I have four questions concerning H-W Equilibrium: (i) In a population of mice, the presence of black spots is the result of a homozygous recessive condition. If the frequency of the allele for this ...
2
votes
0answers
72 views

PAGE gel in EtBr

I have been using TBE-PAGE gel to see small fragments of DNA by post-staining that means gel is stained with EtBr after electrophoresis. Someone told me that you can add EtBr before polymerizing ...
3
votes
1answer
39 views

What is the distribution of the number of heterozygotes in finite populations?

Consider a bi-allelic locus with alleles A and a. We denote the frequency of the A allele by ...
1
vote
0answers
83 views

How do we know Denisovans had 46 Chromosomes

What allows sequencers to conclude that Denisovans had 46 chromosomes rather than merely knowing Denisovans had the crossover material arranged in 48 or say 44 chromosomes? See http://genetics....
1
vote
2answers
42 views

Is it possible to amplify every single piece of DNA through PCR?

Is there a way to perform non-specific PCR amplification for the purpose of amplifying every piece of DNA present?
3
votes
1answer
131 views

How is pain induced by blunt and sharp objects?

Normally, when something touch you, you won't feel pain. With a great force "touching" you, you will feel pain. However, if something that is spiky makes contact with you, you will feel pain. So, how ...
2
votes
3answers
155 views

Extending a small fragment of DNA

Is there a way to extend a small fragment of DNA, say 150 bp, by making copies of itself and attaching each copy of that small fragment to the end of that 150 bp sequence? For example, I want a 1 ...
0
votes
0answers
19 views

White blood cell transfusion

Some patient who have low White blood cells need WBC Transfusion do resist infections. What is interesting, doesn't transfused WBCs cause temporary autoimmune disease ? Like recognising patients ...
3
votes
0answers
21 views

What techniques can be used to link environmental conditions to crop yield?

Im interested in how we can determine what are the optimal conditions for crops and how deviations from these optimal conditions affect yield. In the literature I have found two main approaches and I ...
5
votes
2answers
116 views

Role of microvilli in cell volume regulation

Does the presence of microvilli on a cell's surface ensure that it's more resistant to cell swelling or lysis in a hypotonic solution, as compared to a normal cell?
0
votes
2answers
87 views

Junk DNA and “random” mutations [closed]

I'm somewhat irritated by "mutation" generally being described as a fully random factor in evolution: pure randomness does not seem like something that can survive in a long evolutionary process. And ...
0
votes
3answers
64 views

Whole Genome Sequencing and B Chromosomes

Do whole genome sequencing techniques detect B chromosomes if such chromosomes are present? My understanding is as follows: How the DNA material in a B Chromosome is mapped depends on the reference ...
1
vote
0answers
16 views

Why is dopamine considered both an excitatory and Inhibitory neurotransmitter? [duplicate]

To me it seems the one allows flow and the other prevents flow. How does dopamine do both?
1
vote
3answers
92 views

Whole Genome Sequencing and Chromosome Counts

In general, do standard whole genome sequencing techniques rely more on known chromosome counts, independently arrive at chromosome counts, and/or not directly address issues such as base number, ...
0
votes
0answers
114 views

Why I don't feel pain when I press the skin on my knee and elbow?

Does the muscle on our knee and elbow have some speciality ? Why are we unable to feel any sort of pain when I pinch it ? I also did it with my Mom and Dad and result was same .
6
votes
1answer
43 views

What species is this?

We found this on a beach in the Bay of Lannion, Brittany, France. What is it? About 6 cm long.

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