All Questions

0
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0answers
19 views

Which animal is this? (Bone)

Which animal is this? It was found in Denmark in a few centimeters depth. The length is approximately 12 centimeters.
0
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1answer
66 views

Is it possible for human beings to feed through the nose?

There is a prediction on a futurology site that food can be eaten by inhalation https://2050.earth/predictions/smell-can-feed-you Although aerosol foods do exist they are still eaten by the mouth. ...
1
vote
0answers
20 views

The correlation between a leaf's age and its length in the initial stage of growth [on hold]

I am building a machine learning algorithm which predicts the age of a leaf before its maturity period based on its measured length or area. I would like to know whether there is a mathematical ...
0
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0answers
15 views

What kind of Porcupinefish is this?

The fish on this picture has a body length of about 10cm. Is it a Slender-spined porcupine fish? I've searched Slender-spined porcupine fishes on wiki and youtube, and found that the shapes of ...
0
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0answers
9 views

How to grow Bacillus subtilis spores for making natto?

I enjoy making fermented foods, one of them is natto, which is cooked soybeans fermented with B. subtilis. I usually buy the B.s. spores online, but they are somewhat expensive and often hard to find....
1
vote
0answers
58 views

How does the emerson effect produce a higher rate of photosynthesis?

Can anyone explain how the emerson effect works to increase the rate of photosynthesis, and as the original studies were done over 50 years ago, how much research is still done into this area? Or is ...
1
vote
2answers
71 views

What is a “pan-specific” antibody?

I am new to biology. I searched a lot to find an article that explains what "pan-specific" antibody is but I could not find anything substantial that would help me understand what it is. An example ...
4
votes
1answer
47 views

Mechanism of redirected blood

I've read several fitness articles mentioning redirected blood flow to muscles that are in use. However, they never mention how it works. Is it local and specific to the muscles in use? Or, for ...
0
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0answers
8 views

Rhodamine 123 Staining Function

How does Rhodamine 123 act as a probe for Mitochondrial Staining? What is the Exact Biochemical Basis? and can it Stain Chloroplast as well? Thanks in Advance
1
vote
1answer
40 views

How to download different kinds of data from NCBI eutils?

I have been researching NCBI eutils and wish to get some 'big data' from it. I know that I can construct queries to query one of (I think) 8 databases, like this: ...
0
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2answers
29 views

Base pair and amino acid weights? [closed]

How does a base pair weigh approx. 650 Da (which is two paired nucleotides) but an amino acid (3 nucleotides) weighs only approx. 110 Da ?
2
votes
1answer
24 views

What kind of spider is this? Bolivia

Can anyone help me identify this spider found in Cochabamba, Bolivia. It is quite small. This photo shows it on a normal mortar layer between brick.
1
vote
0answers
14 views

How do you interpret the resulting bands of gel zymography?

I would like to clear up some things for gel zymography. I understand that bright bands show proteolytic activity. But which molecular weight do these bands correspond to? Is it the weight of the ...
0
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0answers
24 views

How does the immune system recognize harmful proteins?

How does the human immune system detect whether a protein happens to be a protein found in the body that is supposed to be there, a bacterial toxin that should be inactivated, an already inactivated ...
1
vote
0answers
23 views

Is the tendon width determined by genetic predisposition, and if so, is genetics the sole factor?

Tendons' widths vary widely across humans. E.g.: {1}: "the mean patellar tendon width was 26.10mm (SD = 3.31; range 18.33mm-33.33mm)" {2}: "Size of the patellar tendon width, measured at the same ...
1
vote
0answers
21 views

When does the brain stem appear in humans?

This article states: Once the neural tube closes, at around week 6 or week 7 of pregnancy, it curves and bulges into three sections, commonly known as the forebrain, midbrain and hindbrain. ...
1
vote
2answers
74 views

Could a strong magnet field repel the body before damaging it?

Could a magnetic field be strong enough to damage the body or erase the brain? Blood is slightly diamagnetic, so if the field was strong enough, could it repel a body evenly? Could a diamagnetic ...
0
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0answers
13 views

Gene cluster of interest not being amplified in PCR

In a lab, I currently have a sample of Rhizobium sp. NT-26. This bacteria is a chemolithoautotrophic arsenite-oxidizer, and I want to clone the arsenite oxidase genes into another bacteria strain in ...
0
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0answers
9 views

What is the net effect of pancreatic somatostatin and how is it regulated?

I've read the following facts about pancreatic somatostatin released from delta cells of the islets of Langerhans: Blood glucose, fatty acids, and plasma amino acids stimulate somatostatin ...
7
votes
1answer
83 views

Why don't allergies cause fever?

Allergy To my understanding, an allergy is a hypersensitivity of the immune system causing a substance in the environment to be identified as pathogenic by the immune system while it is not ...
1
vote
1answer
19 views

Why do the most structurally well-characterized bacterial RNA polymerases belong to thermophiles?

From Lewin's Genes (11th edition, page 515): The only bacterial RNA polymerases for which high-resolution crystal structures have been solved, however, are from two thermophilic bacterial species, ...
2
votes
1answer
34 views

How is fructose absorbed into the body

I’m finding contradicting methods of Fructose transfer to blood page no 264(10)One of which saYs fructose is absorbed by simple diffusion And another sources like this say that fructose is ...
0
votes
0answers
7 views

What culturing process / experiment needs a “grid” petri dish (one with a vertical division)

You can buy petri dishes with separations in them like this: I have studied biology and biochemistry and never come across one of these before. What cell culturing / experiment would this be used in?...
1
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0answers
15 views

What properties of the pathogens of infectious diseases make recovered individuals susceptible to the disease?

I was wondering what properties of the pathogens of infectious diseases make these diseases more prone to making recovered individuals immediately susceptible to the disease? I was thinking that with ...
0
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0answers
18 views

Why does our body absorb toxic substances or toxic concentrations of a substance if it is capable of regulating gastrointestinal absorption?

Our gastrointestinal system is filled with regulatory molecules that place brakes in the absorption process. For instance, the food that we consume daily is filled with harmful substances that our ...
-2
votes
1answer
43 views

Can anyone help me with these Biology evolutionary properties homework questions? [closed]

my teacher assigned these worksheet questions, they are ungraded, but he said something might come up on the test really similar to this so I really want to get all of them right. I am pretty ...
3
votes
0answers
21 views

Can sperm cells penetrate the cell membrane of non-ovum cells?

Sperm cells have tiny bags of enzymes on their tip (the acrosome) which allow them to penetrate the ovum. My question is whether or not the process that allows sperm cells to penetrate the cell ...
0
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0answers
6 views

What happens with the prothallus after fertilization?

The prothallus is the small gamethophyte stage in pteridophytes. What happens with it after the fertilization and growth of the sporophyte? It stay attached to the sporophyte? It degenerates?
2
votes
1answer
21 views

How does (action potential) hyper-polarisation work?

I understand that after depolarisation, repolarisation and then hyperpolarisaiton occurs and that an area in hyperpolarisation is in its "refractory period". Why does this prevent Na+ ions diffusing "...
2
votes
1answer
125 views

What the name of this fish?

Well saw this on a fish group on facebook. Noone can give a decent answer so I came to you guys hoping you can help us? The one who posted lives in the Philippines and he said he caught it in the ...
3
votes
1answer
94 views

Is coral photosynthesis dependant on the wavelength or frequency of light?

When buying a light fixture for a marine fish tank, it is often sold with some technical data reguarding the spectral output of the light, with a peak in the blue region of visible light, somewhere ...
0
votes
0answers
25 views

Are genes for producing heterozygotic twins sweeping?

The tendency for a woman to ovulate two or more eggs at once, which may results in a heterozygotic multiple births is the way I understand it at least to some part genetic. At least since the ...
0
votes
0answers
11 views

PU.1 ChIP-grade antibody

We have been using a ChIP-grade antibody for PU.1 ChIP-seq (human/mouse) from Santa Cruz that has now been discontinued. Has anyone a current and hands-on-based (...
1
vote
0answers
19 views

Reference request: Lipid composition in bacterial, yeast and human membranes

I would like to know about the lipid composition of different kinds of cellular membranes. I remember going through such a table once in a paper, but I am unable to find it anymore. What I am looking ...
1
vote
1answer
19 views

16S rRNA and 5S rRNA datasets

I need 16S rRNA and 5S rRNA (Gammaproteobacteria - E.coli) Secondary structure files in ct format. I tried looking for them in different RNA databases, could not find one. Can someone tell me where ...
1
vote
0answers
35 views

What is the origin of plasmids?

As I understand it, plasmids, like mitochondria, have their own genetic material and are capable of self-replication. According to Wikipedia: Plasmids are considered replicons, units of DNA capable ...
0
votes
1answer
14 views

Lysosomal Storage Disease

In my biochemistry class today we did a problem detailing two lysosomal storage diseases. In the first scenario, a cell line for I-cell disease can synthesize lysosomal hydrolases that are perfectly ...
5
votes
0answers
37 views

The truth behind human urine and marking territory?

So some years ago, I remember watching a survival show in which the host said that human males produce a type of chemical in the urine that animals such as wolves can acknowledge as a territory marker....
0
votes
0answers
10 views

Can fish hear ultrasonic frequencies?

I have a team that's working on using ultrasonic waves to measure the volume of water in a fish tank. We have both gourami and tilapia in the tank, and wanted to make sure that they wouldn't hear the ...
4
votes
1answer
57 views

How are the first mammary glands thought to have functioned?

I happened upon a book (not about biology) containing this text: A life-changing birth occurred on the planet about 190 million years ago [...] the first tiny shrew like creature brought forth an ...
0
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0answers
14 views

why is multiple blunt end repairs for one sample necessary

when is it necessary to prepare more than one blunt end repair library from an ancient DNA Extract? and what does it achieve?
2
votes
1answer
51 views

What do we call these containers used in biotechnology?

I'm translating an autoclave instruction from Russian, and it says that these containers (ванночки) (see the black circle on the below photo) are to be sterilized in the autoclave. I'm not sure what ...
0
votes
0answers
19 views

How to differentiate transportable element and non-coding RNA in genome?

I am searching for unannotated non-coding RNA in my genome at the same time i want to omit the transposable element from my genome. My sequencing libraries are paired-end and i am searching in the IGV ...
0
votes
0answers
12 views

How do viable sperm persist for weeks?

Tests on men who have undergone vasectomies show viable sperm in their ejaculate weeks and dozens of ejaculations after ligation of their vas deferens. How is this possible? How long does a ...
0
votes
0answers
11 views

What is the mechanism behind cells being arrested in G0 phase by serum starvation?

When Dolly was cloned, it was not from a totipotent cell in an early embryo but a G0 phase induced cell originating from the donor sheep's mammary glands. I have found sources stating that a fully ...
0
votes
0answers
14 views

Ink blue molds/fungi/dermatophytes

Which of the above has naturally ink blue hyphae? Are there any that make both Ochratoxin A and fumononis toxin and have hyphae that color?
0
votes
0answers
10 views

What is the tensile strength of muscle?

So I am looking at determining the pressure needed to impale a person with an object of a given size and shape. To figure this out, I believe I need to know the tensile strength of skin, bone, and ...
34
votes
2answers
9k views

Why “Having chlorophyll without photosynthesis is actually very dangerous” and “like living with a bomb”?

The Phys.org article Scientists discover first organism with chlorophyll genes that doesn't photosynthesize says "For the first time scientists have found an organism that can produce chlorophyll ...
-1
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0answers
22 views

What is the difference between different schools of taxonomy?

I have been quite interested about biology lately. I would like to know what are some of the main differences between schools of taxonomy. Thank you for the answer!
0
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0answers
5 views

What is a secretion target family protein?

I came across this link: https://www.genome.jp/dbget-bin/www_bget?btw:BF38_3398 What is this protein, is it a secreted effector protein or is it something else? What is the difference between type ...

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