0
votes
0answers
7 views

ants and their super powers

I've noticed lots of ants being inside a vacuum package with sugar confectionery decorations. How did they get into a completely healthy vacuum package ? (P.M they ate its colors, what is left is ...
0
votes
0answers
4 views

Methods for detecting local adaptation in absence of genetic data

Background Local Adaptation is a famous subject of interest in ecology and evolution. Among ecologists, it is not rare to try to find evidence of local adaptation in absence of genetic data. As a ...
0
votes
0answers
3 views

What happens when mammalian ovum fails to get fertilized?

If mammalian ovum fails to get fertilized , which of the following is unlikely ? a) corpus leuteum will disintegrate b) estrogen secretion further decreases c) primary follicles starts developing d) ...
0
votes
0answers
12 views

How to isolate two plasmids from E. Coli strand?

I have an E. coli cell line I use to express a protein using a two plasmid system. One confers AmpR and one KanR. For mutagenesis I would like to separate the plasmids to increase efficiency of the ...
-2
votes
1answer
36 views

Is evolution useless as a predictive theory?

My feeling is that almost any observation can be explained by current evolutionary theories. Is there any example of someone developing a rigorous framework or model of how evolution works?
1
vote
1answer
27 views

How does mutualism arise?

How can a mutualism between two species arise? I have thinking about this for a while and I have come up with the following points 1.If mutualism gives one specie a competitive edge over its ...
-2
votes
1answer
20 views

What are silent carrier traits?

I couldn't find a definition but I have come to know the following from google search: People who are carriers of a thalassemia gene show no thalassemia symptoms and might not know they're ...
1
vote
1answer
14 views

distribution of some injected materials/medicines through blood vessels

Fastest distribution of some injected materials/medicines & with no risk of any kind can be achieved by injecting it into - artery or vein?
1
vote
0answers
6 views

Can the presence of Y chromosomes in tissue play a part in trigger tissue rejection in opposite sex?

Can the presence of Y chromosomes in tissue after a tissue graft or transplant from a male to a female play a part in triggering tissue rejection other than other main factors? If so, how?
3
votes
1answer
15 views

Are there any primary structure sequences that strongly suggest b-sheet or alpha helix?

Is there a particular sequence of amino acids that we know will take on a beta-sheet or an alpha helix or is it essentially random?
0
votes
0answers
14 views

Brain controls switched sides? [on hold]

I've been wanting to ask about this for along time, I was told about it when I was young but wanted to ask again. Not long after I was born (I was 7 weeks early) I had to have an operation cuz I ...
-1
votes
2answers
29 views

What are sex linked traits?

Which of the two definitions of sex-linked trait is correct? Traits controlled by genes present on the non-homologous region of sex chromosomes are called ...
0
votes
0answers
15 views

Links between Genetics and Personality Types

This topic was visited briefly in the thread, Genetic Effects on Personality, but I was surprised not to find more on it. (Is there a taboo I don't know about? What's the ethical stance on this ...
0
votes
0answers
8 views

Term of the type xxx-troph for a compound not used by an organism

A prototroph for compound X can make it, a bradytroph grows faster if X is scavenged, an auxotroph needs to scavenge it and a hyperauxotroph lacks both the biosynthetic pathway and the transporters. ...
1
vote
1answer
40 views

What would happen if nerves didn't have refractory period? [on hold]

What would happen if nerves didn't have refractory period? And, what part of his nervous system or neurons are not needed?
2
votes
0answers
16 views

How do we find antibiotics?

So the last class of antibiotics were made in 1984 (I think), which makes it appear as though they are hard to find(/design maybe). How is it then they were discovered? Was it by chance? I know some ...
0
votes
1answer
21 views

Rifle Bullets and Lead Exposure

Does anyone know if simply touching bullets could give you lead poisoning?
1
vote
0answers
14 views

Effective Mycoplasma Elimination from Primary Human Cultures

Obviously the best way to avoid mycoplasma contamination is to avoid it in the first place. In our case, however, it is not possible to avoid. We are culturing viruses and tissues out of human nasal ...
1
vote
0answers
6 views

Effect of interruption of photoperiod in a short day plant

When a short day plant is exposed to its critical period of darkness it flowers. But when it is exposed to a small period of red light which exceeds the critical period it doesn't flower. But when it ...
3
votes
2answers
36 views

Mutating a protein without mutating the gene?

Is it possible to mutate a region of a protein (says about 300 amino acids long) without actually mutating the gene? One possible way that I can think of is to use RNAi and specifically block that ...
0
votes
0answers
22 views

What bug is this? Location:Singapore (Asia) Climate:Monsoon [on hold]

What bug is this? It looks like a worm in a open end conical case. I found it suspending from a ceiling from a web.
0
votes
1answer
12 views

Techniques for phosphosite detection?

I would like to know how phosphorylated sites in proteins are detected in practice. I read some papers where the authors were talking about mass spectrometry techniques. But my question is that why ...
1
vote
0answers
15 views

Plasmid electrophoresis with DNases

DNases are used for treatment of cystic fibrosis. A normal DNase catalyzes the hydrolytic cleavage of phosphodiester bond in one strand of DNA. Scientists, in order to improve efficacy of DNases, use ...
0
votes
0answers
9 views

Lyonization and Turner's syndrome

If lyonization is basically inactivation on X chromosome, and Turner's syndrome patients have only one existing X chromosome, what is the difference between healthy women with inactivated X chromosome ...
0
votes
1answer
9 views

Indoor plants acidic soil

I have a ponytail tree plant. The new growth look anemic, pale and thin. And several leave have browned from the midway to the ends of the leaves. The stem is woody and firm. Though it is in a solid ...
0
votes
1answer
10 views

What are the theoretical and actual (measured) minimum water potentials in plants?

I'm a plant physiology researcher, but water potentials are not really my thing, so I don't have a great grasp on the literature. I'm dealing with water potential data right now though, and it seems ...
0
votes
0answers
5 views

Counter current multiplier system affecting the loop of Henle and the collecting duct

Does the counter current multiplier system work by creating a high solute concentration in the interstitial fluid, so that water is caused to move out of the descending limb and in the collecting ...
1
vote
3answers
53 views

Can a single strand of mRNA form different polypeptide chains?

My book has a statement: A single strand of mRNA is capable of forming a number of different polypeptide chains. In my opinion this statement is wrong because a single strand of mRNA will have same ...
2
votes
0answers
22 views

How do organoarsenics improve digestion efficiency in poultry?

It struck me as very surprising that these organoarsenic compound with structure looking not very compatible with living system is widely used as food additive to increase weight gain and improve food ...
10
votes
1answer
956 views

Darwin's first sketch of a phylogenetic tree

Coming from Darwin's notebook this first sketch of a phylogenetic tree became one of the most emblematic image from Darwin's work. I have a hard time to read what is written on it. What is written ...
3
votes
2answers
25 views

How to find PDB id of an amino acid sequence

Suppose I have an amino acid sequence whose PDB id is unknown. Is there in online server that can find the PDB id of the corresponding amino acid sequence? is there any site that will find the pdb ...
0
votes
1answer
12 views

Is there a difference in how Gas is produced which determines if it becomes a burp or flatulence?

I know that some gases are heavier than air and in the case of a gas leak it's best to escape to higher ground, while some gases are lighter than air such a Helium however unlike Helium i havn't seen ...
-5
votes
0answers
41 views

How many ATP equivalents are required to make one AMP/ADP/ATP? [on hold]

Biochemists and biologists are obsessed with ATP. Their calculation of ATP equivalents is absurd. They claim that one NADH= 2.5 ATP and that one FADH2 = 1.5 ATP blah blah without carefully looking at ...
0
votes
0answers
16 views

Genetic Decline of Mycelium [on hold]

A book I have by Paul Stamets says that after about ten petri dish transfers, genetic decline starts to slow the growth of mycelium. However, there is a four-square mile mycelium colony in Oregon. How ...
-1
votes
0answers
25 views

Why don't male cheetahs rear their offspring? [on hold]

It seems like a huge evolutionary advantage to do so. It could prevent their cheetah cubs from getting eaten when their mother is hunting. Maybe that's not a big evolutionary disadvantage because when ...
0
votes
1answer
12 views

When is Pheophytin used in electron transfer to the q cycle in plants?

If I understand it correctly: (short version) The Q cycle starts with PQH2 it removes the 2H(+) and gives one electron to Plastocyanin and the other to a stored Plastoquinone to charge it to ...
0
votes
1answer
13 views

Which animal that lives in the forest makes this noise?

Which animal makes this noise? Link to audio file The file was recorded next to a forest in Germany.
3
votes
1answer
44 views

What kind of kale is this?

I'm from Pennsylvania and I used to get this kale all the time at the grocery store, but I moved to the West Coast recently and can't find it anywhere! It looks exactly like this photo: Image ...
0
votes
0answers
21 views

How do expression levels change along lineages?

Is there any general trend between gene expression levels (or transcription levels) and cell lineages? For example, I would naively expect that stem cells express less genes as they have the ability ...
0
votes
1answer
28 views

What kind of detergent should I use in cell culture laboratory for cleaning purposes?

I work on establish a cell culture laboratory in the company where I work. All equipment are new and I want to clean lab before I start to work with cells. Is there any special detergent for cleaning ...
0
votes
0answers
14 views

Why do doctors use tendon instead of ligament in key-hole surgery? [migrated]

For knee surgery, the most common method is to use a tendon from elsewhere in patient's body to replace the torn anterior cruciate ligament. But why tendon not ligament? Tendon have different ...
0
votes
2answers
555 views

3 flaws of genes from the perspective of a programmer [on hold]

Having a double helix structure seems like a waste of space. In programming you would have a single array and just before mitosis you would double the single helix. Having an exact copy of a ...
0
votes
0answers
15 views

Please identify bird call / animal call

from the opening samples of this song. https://www.youtube.com/watch?v=oC3XZEWB5GM I wish to study the frequency distribution of the bird call.
1
vote
1answer
36 views

Biological meaning of Lotka-Volterra Jacobian matrices

In a book about community ecology, I learned about Lotka-Volterra models and dynamic food web models (I am not an ecologist in the first place). In one of the chapters, a Jacobian matrix of partial ...
1
vote
1answer
86 views

How can alcohol cause blindness?

Strong alcoholic beverages (e.g. moonshine) are reported to have caused blindness amongst some people. How exactly can alcohol make someone go blind? Is that because different forms of "rubbing" ...
0
votes
0answers
37 views

Can the DNA of 2 women create a child? Chimera [on hold]

Imagine a woman and a man creating a child. The man is in fact a chimera whose unborn twin was a female. Is it possible that some of the spermatozoids of the man contain DNA of only the unborn female ...
1
vote
1answer
34 views

What are Some Classical Examples of Local Adaptation?

Question Can you please give a list of classical (textbook) examples of local adaptations? How to answer Examples don't necessarily need to include what evidence supports this specific example of ...
0
votes
0answers
20 views

Western Blot suitable condition [on hold]

I would like to ask you some advice about western blot technique. What should be the best way to running my sample? I'm using a lower voltage, until the packaging into the stacking gel, and then a ...
1
vote
0answers
89 views

Have people in Africa already started evolving resistance to AIDS?

Are people living in areas where AIDS is rampant (for e.g. Africa), less likely to die from it than they once were because some of the people without genes/mutations that give them resistance already ...
0
votes
0answers
10 views

Repeating assays assessing drug synergy by Chou and Talalay method

I have been using MTT cell viability assays to test compounds, both as single agents and in combination, in a constant ratio. From these assays I have been able to plot the median effect plot to get ...

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