0
votes
1answer
15 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: ...
4
votes
0answers
38 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
1answer
18 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
2answers
46 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 ...
0
votes
0answers
15 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 ...
1
vote
1answer
23 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 ...
0
votes
0answers
14 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 ...
4
votes
3answers
68 views

Cell cycle selection

Is it possible to select from colonies only cells which are at a certain stage in the cell cycle? E.g. if I was trying to analyse expression of a number of genes during different stages of the cell ...
0
votes
2answers
29 views

Spatial dimensions for an animal

I'm reading a review paper. They say: The position of an object in head-centered coordinates (that is, relative to an animal's head) can be defined along three axes: the medio-lateral (radial) ...
2
votes
2answers
494 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 ...
2
votes
1answer
69 views

Programs/software to graph biological data [closed]

I am curious about what sort of programs people in my field of academia are using to graph their data. I am a master student in biochemistry, and have more or less only used excel (on rare occasions I ...
0
votes
1answer
49 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? ...
4
votes
1answer
55 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 ...
7
votes
3answers
4k views

What makes DNA sticky-ends sticky?

When restriction enzymes jaggedly cut double stranded DNA it results in so called sticky ends. What is the substance that makes the DNA sticky?
0
votes
0answers
11 views

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

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 ...
1
vote
1answer
67 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" ...
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 ...
0
votes
0answers
14 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
0answers
31 views

FitzHugh–Nagumo system with diffusion

I was studying the FitzHugh-Nagumo model with diffusion and I quite do not understand the meaning of it. If we consider the system without diffusion, \begin{equation}\label{FHN}\begin{cases} ...
5
votes
2answers
2k views

Why is the DNA helix anti-parallel? [duplicate]

Why is it that DNA strands are running in anti-parallel fashion? Given the chemical base-pairing, they could have been parallel just as well.
1
vote
1answer
25 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 ...
13
votes
3answers
4k views

What is the evolutionary reason behind the fragility of teeth?

Almost all organs in the human body have a rather large threshold within which the organ or tissue is capable of repairing itself using materials supplied by the body, whether it's made from organic ...
3
votes
1answer
2k views

Does a woman contain all the genes needed to make a man?

I know the answer of inverse is at here, but how about this question? I also read this question, can I imply to human that a woman can also contain all the genes needed to make a man? Edit: I ...
0
votes
1answer
34 views

What are Codominant vs Dominant Genetic Markers?

When talking about types of genetic markers, the adjective "dominant" and "codominant" are often used. I don't fully understand their definitions and found contradicting definitions. Foll and ...
0
votes
1answer
34 views

A doubt on Introgression

Wikipedia says that Introgression, also known as introgressive hybridization, in genetics is the movement of a gene (gene flow) from one species into the gene pool of another by the repeated ...
4
votes
1answer
8k views

Which blood vessel carries the most impure blood?

There is a question in my Biology textbook: "Which blood vessel in the human body carries most impure blood after few hours of meal." The answer is given as Renal artery. But I think the ...
0
votes
1answer
196 views

0.1 M sodium citrate in 10% ethanol and DNA solubility

I understand how DNA precipitation works in the presence of salt (such as 0.3 M sodium acetate or 0.2 M sodium chloride) and alcohol (30 ~ 50 % isopropanol or 60 ~ 75% ethanol) However, in the Trizol ...
11
votes
1answer
145 views

Which biological kingdom comprises the greatest biomass on Earth?

Which of the five biological kingdoms - animalia, protista, plantera, monera, or fungi - has the largest biomass? To clarify, if the biomass of every species in each of these kingdoms was added up, ...
1
vote
1answer
43 views

True or False: Dideoxynucleotide sequence analysis Question

True or false: Dideoxynucleotide sequence analysis is a template-directed method that makes use of chain terminators that stop DNA synthesis because they lack a 2'OH group. The answer is false. ...
1
vote
1answer
37 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 ...
1
vote
1answer
50 views

Can magnetoreception occur in humans?

Magnetoreception is a sense which allows an animal to detect the Earth’s magnetic field in order to perceive direction, altitude, or location. Magnetoreception is present in bacteria, arthropods, ...
0
votes
1answer
72 views

How much do crocodiles eat`?

How much do crocodiles eat? The closest I found to an answer was on german wikipedia, where it says that adult nile crocodiles eat "only about 50 full meals a year." While interesting, without knowing ...
0
votes
0answers
31 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 ...
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
17 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
0answers
22 views

How does epigenetics affect the birth conditions via alcohol?

Recent study has shown that epigenetics can play role in male-caused infertility and it cites for example studies which showed an enhancing of silent genes when drinking alcohol. Since the study ...
1
vote
1answer
44 views

What is the name of this green plant with thin leaves?

I've seen this in Scotland between Balmaha and Inversnaid: A higher resolution is here: https://commons.wikimedia.org/wiki/File:Balmaha-Inversnaid-9.jpg What is the name of this green plant with ...
4
votes
2answers
93 views

Is it possible to have different genes in different parts of our body?

I want to understand genetic mutation specially in the context of multicellular organisms like humans. I studied biology only till high school and I can’t fully understand wikipedia pages on this ...
0
votes
0answers
5 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 ...
1
vote
1answer
25 views

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

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

What kind of spider is this?

My home country, Mexico (Mexicali, North of Mexico), is infested of Loxosceles reclusa spiders. Yesterday I found this spider in my house, however I do not know this kind of spider. Can you identify ...
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, ...
1
vote
0answers
28 views

Barcode exchange between neighbouring cells

I am currently interested in equipping animal cells in a tissue with individual barcodes. These barcodes should get amplified in the cells (not to a cell degrading extent, of course), and also ...
8
votes
2answers
702 views

Are all quadrupeds edible? [on hold]

Yes, you can call me a pervert, but every-time I visit a zoo it makes me hungry. I wonder if all quadrupeds (or, mammals, at least), are edible? From what I have collected, even down to fish, ...
-2
votes
1answer
33 views

What are the significances of chromosome mapping? [on hold]

The few point that I have come across are: The following are the significances of chromosome mapping: Chromosome maps help identify the location of gene of interest on a chromosome for genetic ...
1
vote
0answers
18 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 ...
0
votes
1answer
20 views

Variant VCF: AD vs DP?

In my VCF file from GATK, I have the following definitions for AD and DP. ...
1
vote
0answers
16 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 ...
0
votes
0answers
11 views

Affinity species between plant by protein [on hold]

How determination Affinity species between plant by protein electrophoresis?
3
votes
1answer
73 views

How does a protein reach its substrate within the cell?

After a protein has been synthesized and its the final tertiary/quartenary adopted, how does it reach its substrate within the cell and what causes it to interact with it? The transcription factors ...

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