0
votes
0answers
5 views

How to retrieve logical expression for reactions from KEGG?

Whether a module is complete or not can easily be checked by evaluating the Definition entry associated with the module; e.g. in module M00010, it is given by ...
0
votes
1answer
7 views

How does an increase in CO2 concentration affect Photosynthesis and Transpiration

I noticed a strange thing in my book. At one place it says that an increase in CO$_2$ concentration in the outside air decreases the rate of transpiration but at the other place it says that an ...
0
votes
0answers
6 views

Wilting of plants at night?

I have seen that certain plants wilt at night as well! But its quite normal temperature and i tried to figure out the biological reason but in vain . I know that why they wilt during the day since I ...
0
votes
0answers
6 views

What drives male fish to spray their milt?

In mammals the sexdrive of the males is because the intercourse provides a satisfaction where after, the sperm is ejaculated into the female. However, the male sperm doesn't enter the female fish but ...
0
votes
0answers
7 views

Metal and epilepsy

How does metal rods or keys help a person in epilepsy? A person with fits is generally given a metal when he is attacked by epilepsy. How does the mechanism work?
1
vote
0answers
17 views

How is a T lymphocyte specific to an antigen but not specific to an epitope?

In my immunology notes, it states that B lymphocytes (and other APCs) capture and present antigens to T lymphocytes that is specific for an antigen, but that the T cells do not necessarily recognise ...
0
votes
0answers
10 views

Resting stage of primary oocytes

In my biology textbook, I read that the primary oocyte gets arrested in the early stages of meiosis in prophase I (diplotene stage). I wanted to know why this is so. I searched google, and this ...
0
votes
0answers
7 views

Similarity between lncRNA and Enhancers

Please read it carefully. Question below is purely based on computational experiments: I have been running an analysis algorithm (pretty new one) on lncRNAs and its showing pretty much the same ...
1
vote
1answer
13 views

Minimal viable EEG equipment for dissertation research on BCI / BMI

I am planning out a dissertation study of Brain-computer Interface (a.k.a. Brain-machine Interface, BCI, BMI, etc) applications. One of the 3 papers in that dissertation will involve collecting ...
0
votes
2answers
11 views

What is the genetic difference between two cone branches?

As we can see on this larch, male and female cones are sometimes directed to grow on the opposite side of the branch. We were told in school that this mechanism works against self-fertilization. Also ...
1
vote
0answers
9 views

What is the exact percentage of spectral changes that human pinnae introduces into the acoustic input signal?

I read somewhere that amount of spectral changes that human auricula introduces into the input signal is 6%. Now I cannot find that literature. Does anyone know a source that might confirm this, or ...
0
votes
0answers
15 views

What do recessive/dominant alleles actually mean in terms of modern genomics? [duplicate]

In Mendelian genetics, we discuss phenotypes, which are specified by the alternative versions of genes called alleles. In terms of peas, the phenotype "round pea" encoded by one allele of a gene is ...
0
votes
1answer
20 views

short-day facultative plant, abrupt change to photo period

What happens biologically to a short-day facultative plant that is a few weeks into its short day (flowering) photo period and is suddenly given a 24 hour period of light? Does anything change ...
1
vote
0answers
13 views

Bug ID. Infestation in Pennsylvania

Several of these crawling on the walls. Length ~3-4 mm. Some (adults?) are larger and darker colored.
1
vote
1answer
30 views

Lifetime of biomolecules such as Calcium or IP3

Can anyone suggest me literature on the lifetime of biomolecules such as calcium or IP3? A book would be preferred. What I am specifically looking for is a validation that biomolecules have a certain ...
1
vote
0answers
18 views

Where do plants obtain the metal ions needed for biological processes?

Enzymes employ metal ions (e.g. Mg, Cr, Mn, Fe, Co, Ni, Cu, Zn) for catalysing certain reactions. Let's consider planting a seed. Where will it obtain these metal ions from? Just from water?
4
votes
2answers
23 views

Larvae Identification

Can you help identify this worm? It was found in a cup of water at a restaurant (unpleasant, yes), likely came through the water system. (Location: Texas) Found these images of it online (in which ...
2
votes
1answer
19 views

If crocodiles are k-selected, why do they supposedly “not age,” as in avoid senescence?

I recently saw a few sources stating that Crocodiles do not biologically age, implying negligible senescence. Basically, a 70 year old crocodile is in the same physical/health condition as a 7 year ...
4
votes
0answers
24 views

The Perplexing Trilobite: What is the Evidence Supporting The Hypothesis That They are Not Crustaceans?

In the field of paleontology, one question that's really bugged me (er, no pun intended) of late is why the subphylum/class Trilobitomorpha/Trilobita is off on its own branch of the Arthropoda phylum, ...
0
votes
1answer
9 views

Mesoderm vs Mesenchyme- what's the difference?

My embryology textbook states that mesoderm can exist as Mesenchyme or Epithelium. I'm not sure what 'epithelium' means. Here is a quote for context: Somatic, splanchnic, and somite mesoderm can ...
0
votes
0answers
10 views

Fine permanent fluorescent marker for blue light

I am looking for a fine- (or small-)tipped permanent marker to write on Petri dishes that is visible under a blue light or a transilluminator. It would seem obvious, but it is a nuisance. The ...
1
vote
0answers
27 views

Can we modify plasmids to eliminate antibiotic resistance?

This is a very general question regarding the potential use of artificially modified plasmids to block or modify bacterial evolution in order to prevent development of anti-biotic resistance. For ...
2
votes
1answer
24 views

What are tail currents?

This is a voltage clamp on an ion channel. When the voltage is stopped there is a still a current at the end (the tail current). I understand that the gates aren't completely closed because of which ...
0
votes
1answer
45 views

Current state of Gene Therapy [on hold]

I am interested in learning about attempts to treat adult individuals suffering from a genetic disease in which the underlying changes in the DNA of the gene are understood. (i) Are there approaches ...
-3
votes
0answers
42 views

ants and their super powers [on hold]

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

How can you tell if there is local adaptation? Non-genetics Methods review

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
16 views

What happens when mammalian ovum fails to get fertilized? [on hold]

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
1answer
29 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 ...
0
votes
1answer
77 views

Is evolution a predictive theory?

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

How does mutualism arise? [on hold]

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
25 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
18 views

distribution of some injected materials/medicines through blood vessels [on hold]

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?
4
votes
1answer
21 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
15 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 ...
-2
votes
2answers
50 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
16 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
9 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
48 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?
4
votes
2answers
47 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
29 views

Rifle Bullets and Lead Exposure

Does anyone know if simply touching bullets could give you lead poisoning?
1
vote
0answers
15 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
8 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
41 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
25 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
13 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 ...
0
votes
0answers
17 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
14 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
10 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
11 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 ...

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