0
votes
0answers
5 views

Brain controls switched sides?

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 ...
0
votes
1answer
19 views

Rifle Bullets and Lead Exposure

Does anyone know if simply touching bullets could give you lead poisoning?
-1
votes
2answers
14 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
2answers
28 views

Variant VCF: AD vs DP?

In my VCF file from GATK, I have the following definitions for AD and DP. ...
0
votes
0answers
20 views

What would happen if nerves didn't have refractory period?

What would happen if nerves didn't have refractory period? And, what part of his nervous system or neurons are not needed?
0
votes
0answers
10 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 ...
2
votes
1answer
54 views

Difference between the P4 and P5 subtypes of P-type ATPases in plants

In plants there are various kinds of P-type ATPases. What is difference between P4-ATPase and P5-ATPase?
0
votes
0answers
4 views

term for trophy for a compound when it is not used used by that 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. ...
0
votes
0answers
13 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 ...
1
vote
2answers
29 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
1answer
20 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.
4
votes
1answer
80 views

Can defibrillation be done with a car battery?

Can successful defibrillation be done with a car battery? Is it POSSIBLE for this to work? Let's say you are stuck on a very remote place and something happens to someone... Moreover, can you jump ...
4
votes
1answer
150 views

Non-monotonic knock-out effects in prokaryotes

Typically, when performing gene-knockout, the experimenters select one gene to remove/replace-with-junk and then see if the prokaryote can still undergo fission. If it continues to reproduce then the ...
2
votes
1answer
137 views

Attaching suspension cells to coverslip during mycoplasma contamination detection

I am planing to screen my cell cultures for mycoplasma contamination using the Hoechst 33258 DNA staining method. This method is suitable for adherent cultures. Is this method suitable for ...
1
vote
0answers
23 views

What is the sedimentation coefficient of Mycoplasma?

I have attempted to find the sedimentation coefficient of a number of bacterial species, namely E. coli and a number of Mycoplasma species, but they seemed to be rather elusive in the literature. If ...
1
vote
0answers
167 views

What is Mycoplasma Lyo medium?

Used for instance in this article The role of genital mycoplasmas as pathogens - - are generally neglected by diagnostic laboratories in the United Kingdom, possibly due to the lack of a ...
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 ...
0
votes
0answers
5 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 ...
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 ...
2
votes
2answers
38 views

How do prions transmit their conformation to other proteins?

I was reading about prions and many sources say something to this effect: "Prions may propagate by transmitting their misfolded protein state: When a prion enters a healthy organism, it induces ...
0
votes
1answer
11 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 ...
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 ...
1
vote
0answers
13 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 ...
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
8 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 ...
1
vote
3answers
50 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 ...
12
votes
2answers
187 views

Protein data bank syntax: Can two protein secondary structures “overlap”?

I have a technical question regarding the syntax in Protein Data Bank files. In the protein with PDB# 1AE9 (pdb file), there are two lines in the .pdb file: ...
4
votes
0answers
21 views

What are the secondary structure requirements for cell-penetrating peptides AKA protein transduction domains

Cell penetrating peptides. Cell penetrating peptides (CPPs) are a class of short amino acid sequences which are sufficient for crossing cell membranes and delivering themselves along with any ...
1
vote
0answers
21 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 ...
16
votes
1answer
561 views

How fast can a human run?

I'm a runner (cross country) and I'm always amazed at how fast Olympic sprinters are. There's a lot of hype about those in the 100-meter dash being the fastest in the world, and we're constantly ...
3
votes
1answer
644 views

Can DNA & RNA be considered as nature's programming language?

The final frontier of Biological Sciences could be considered understanding the effects of variation in the DNA (and RNA). If after fertilization the DNA of the zygote could be genetically ...
0
votes
1answer
27 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
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 ...
7
votes
2answers
725 views

Are all quadrupeds edible? [on hold]

I wonder if all quadrupeds (or, mammals, at least), are edible? From what I have collected, even down to fish, everything is edible apart from being sick or infected, and, apart from some glands ...
7
votes
2answers
98 views
+100

Why do pink rain lilies flower only after rains, and not from being watered?

We have pink rain lilies (Zephyranthes carinata) in the garden. In my personal experience, I've found that they always flower, without exception, shortly after rains. However, there are roughly ten ...
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 ...
10
votes
1answer
952 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
1answer
475 views

Storing Taqman plates with polymerase in fridge before running

I'm going to be running some Taqman assays on cDNA generated from RNA collected from various samples, and will end up running a bunch of plates (right now the setup is 1/2 a plate per sample, ...
0
votes
0answers
45 views

What kind of spider is this?

My home country, Mexico (Mexicali, North of Mexico), is infested with Loxosceles reclusa spiders. Yesterday, I found this spider in my house, however I do not know this kind of spider. Can you ...
3
votes
2answers
22 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 ...
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
3answers
162 views

What problems do invasive species cause ? [on hold]

Why do we value species? What is so bad about invasive species? Why value biodiversity?
1
vote
2answers
86 views

Explaining the simpson's diversity index

In my biology class, we were trying to compare the biodiversity of two site. In doing so, we were instructed to use the Simpson's Diversity index as follows: $$ \frac{\sum_i n_i (n_i - 1)}{N (N - ...
2
votes
1answer
36 views

Does the edge effect promote biodiversity?

I define the edge effect as: A term used to describe what occurs at habitat boundaries where two bordering communities influence one another. My question is whether it generally leads to an increase ...
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 ...
-5
votes
0answers
39 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
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
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
vote
1answer
22 views

What is the reason for 'microcytic' anaemia?

I know the causes for microcytic anaemia are Fe deficiency, prolonged inflammation, Thalessemia, Sideroblastic etc. All these logically point to a decrease in Haemoglobin synthesis - either Haeme or ...

15 30 50 per page