0
votes
1answer
6 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
0answers
4 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
3 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
2answers
31 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 ...
0
votes
0answers
9 views

Organoarsenics as food additives | mechanism of action

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 ...
7
votes
1answer
921 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
20 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
0answers
6 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 ...
-3
votes
0answers
27 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
14 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
22 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
11 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
43 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
23 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
544 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
34 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
81 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
32 views

Can the DNA of 2 women create a child? Chimera

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

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 ...
0
votes
1answer
74 views

Have people in Africa already started evolving resistance to AIDS?

Are people in Africa who have sex with somebody with AIDS noticeably less likely to die from it than they once were because some of the people without genes that give them resistance already died off? ...
0
votes
0answers
8 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 ...
4
votes
1answer
61 views

Can defibrillation be done with a car battery?

Can you do successful defibrillation 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 ...
0
votes
0answers
11 views

Pulse pressure of nine [on hold]

Like the title says, I took a bp test at a pharmacy today and my results were 87 (sys) / 78 (dia). This means that my pp is 9. I know that tests done by untrained people may not be 100% accurate but, ...
0
votes
0answers
47 views

What approximate age does a human baby have to be to survive unassisted? [on hold]

I'm interested in determining the youngest age at which a human child could survive without external assistance. For this question, I want to exclude negative outside influence or threats. For ...
0
votes
0answers
42 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 ...
0
votes
2answers
49 views

Multiple start and stop codons in mRNA and pre-mRNA

I have a main question that will lead to further questions depending upon the answer. In the process of transcription, will there be multiple start and stop codons in one sequence of pre-mRNA? If ...
15
votes
4answers
3k views

How to get rid of mosquitoes in a small lake

I own a small lake. Give or take it is about 50 meters wide and 100 meters long (or 160 feet wide, 320 feet long), with a max depth of around 2 meters / 6.5 feet. One third of the lake is surrounded ...
1
vote
0answers
17 views

Why are there so many regulatory mechanisms in gene expression?

first time posting here, apologies if this is a stupid question. I am a layman, so I might be ignorant to some already well-known or obvious concepts in biology. From what I understand, gene ...
1
vote
1answer
27 views

What is the difference between “genetic” and “hereditary”?

What is the difference between the adjectives "genetic" and "hereditary"?
0
votes
0answers
11 views

Affinity species between plant by protein [on hold]

How determination Affinity species between plant by protein electrophoresis?
0
votes
1answer
24 views

Storage of energy in muscles vs fat depos

How does the body control, where consumed energy (fat, glucose) is stored? And what is its strategy? More specific: 1) How does the body control storing glucose in muscles and not as (subcutan) fat? ...
0
votes
1answer
19 views

Why is tRNA called an adaptor molecule?

All I know about adaptor is that it is a device that converts attributes of one electrical device or system to those of an otherwise incompatible device or system. Thank you.
1
vote
0answers
19 views

Do we perceive contrast colour patterns easily because of adaptation? [migrated]

I can understand that colours are just manipulation of our brain to light rays of different frequencies, amplitude, and wavelength. But we do feel easier to find a pattern on a thing which is of ...
1
vote
1answer
41 views

Coordinates of amino acids in a protein sequence

In PDB format, the coordinates of each of the atoms are available. Are the coordinates for the amino acids available separately? As in say a protein sequence consisting of a chain of amino acids ...
0
votes
1answer
24 views

Variant VCF: AD vs DP?

In my VCF file from GATK, I have the following definitions for AD and DP. ...
0
votes
1answer
21 views

What is the current status of human cloning?

Human cloning is a very controversial subject. I had a professor at Uni whose subject was transgenics. He had a very successful career both in industry and in academia. We were kinda close and he ...
1
vote
0answers
20 views

Insulin and leptin action on Anorexigenic Neurons in Hypothalamus?

Receptors for Insulin are present on liver, adipose tissue and muscles BUT also Insulin Receptors are present in arcuate nucleus of hypothalamus where it influences anorexogenic neurons through IRS2 ...
-4
votes
0answers
21 views

Seasonal and Ecological colours [on hold]

Is the following correct? Difference between ecological colour and seasonal colour: Ecological colour It is the colour that remain throught the year and does not change with season. e.g.- Cryptic ...
6
votes
2answers
86 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 ...
1
vote
1answer
32 views

Why are both glucagon and cortisol released in hypoglycemia?

Cortisol is released in response to prolonged stresses; one situation when cortisol is released is when blood glucose level is low. In this situation cortisol acts on adipose tissue promoting fatty ...
0
votes
0answers
13 views

Biological difference in drugs vs drugs labeled as analytic standard?

I'm scaling up a project that uses ribavirin. Previously, I only had a need for small quantities, so I was prepared to pay a couple hundred dollars for ~50mg of pure chemical (Sigma - R9644). ...
7
votes
2answers
715 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 ...
-1
votes
0answers
22 views

Is there a particular state of performing a specific activity? [on hold]

This question is based on some of my own human activity, but lack of neurological and psychological knowledge, I am not able to deeply answer it. We rise by lifting others - Robert Ingersoll ...
3
votes
1answer
30 views

Is it possible to transfer acquired hemophilia with breast milk?

There is a transplacental form of acquired hemophilia: http://www.jpeds.com/article/S0022-3476%2895%2970132-X/abstract This disease is caused by polyclonal immunoglobulins (IgG1 and IgG4) against the ...
0
votes
1answer
29 views

do game animals have poor eyesight?

I have been watching some bow hunting videos on youtube. When hunting with a bow, the hunter needs to get really close to the animal, sometimes less than 10 meters. It seems to me implicitly, and ...

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