All Questions

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0answers
12 views

Does intermittent fasting promote neurogenesis through the same mechanism as aerobic exercises?

I heard that intermittent fasting promote neurogenesis through the secretion of BDNF, I heard aerobic exercises does the same through BDNF. Now, I am wondering if there are other mechanisms through ...
2
votes
1answer
81 views

Plasma Membrane Proteins and Cytoskeletal Attachment

Regarding membrane protein functions, which of the following statements is CORRECT? a. Membrane proteins are responsible for both cell to cell recognition and cell anchoring and are ...
0
votes
1answer
47 views

How does Sanger sequencing resolve two bands with equal size?

In Sanger sequencing, how can we read the sequence if we have 2 bands with the same size?
0
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2answers
88 views

DIYbio - CRISPR injection sites for targeting the ABCC11 gene [closed]

I've been researching into the biohacking world where people most notable Josiah Zayner and Tristan Roberts have used a CRISPR solution developed in their backyard for gene therapy. There is even a ...
2
votes
2answers
49 views

How does cancerous tissue break down radioisotopes faster than normal tissues?

Apparently, many medical practitioners use radioisotopes to detect cancer in patients. From my textbook (McGraw Bio 12, pg. 10); Using a method called radioisotope tracing doctors can inject ...
1
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0answers
17 views

Trying to find the right plasmid expression vector for e. coli c600

I am very new to the concept of gene cloning and transformation. I am trying transfer the arenite oxidase gene cluster (9kb in length) to E. coli strain C600. I want the E. coli strain to express this ...
1
vote
1answer
32 views

Egypt bug needs identification please

Is it possible to identify this bug,,? Found in South Sinai .in Egypt . Only seen crawling but maybe it can fly ? Black with 6 legs. 2 long black "strings " coming from back end Thank you
0
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0answers
33 views

Are there any DNA base sequences that are shared by every living being that we know of? And if yes, are some of those sequences “silent”?

In "every living being" I am not including viruses as another question already answered that. I have read that some part of the DNA sequences of humans and other animals/plants are "silent" as in not ...
1
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1answer
38 views

What type of spider is this that just decided to stop my plans of sleeping

This tiny little spider decided to stop my plans of sleep at 1am, since I have no plans of getting to sleep any time soon may someone tell me what type of spider could be this monsterous!
-1
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0answers
19 views

What animal makes this track

. I have never seen ones like it before I think it may belong to a Fisher that has been around off and on
3
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0answers
27 views

What is this fungus growing on tree stumps?

Location: Austria, Vienna, Ottakring Forest Time: 2019, Feb 2, 16:02 local time Size: From below; lamellar structure: Some more angles: I found many tree stumps nearby covered by moss, but only ...
0
votes
1answer
25 views

Why does the definition of a “gene” require it to have a product?

In a textbook, I found the following (emphasis in the original): At this point, we can provide a molecular definition of a gene as a sequence of DNA that specifies production of a functional ...
1
vote
1answer
56 views

Why do bacteria adapt quickly to antibiotics but not to much more common threats?

People cook food all the time, why don't common bacteria adapt to extreme heat? It's winter in either hemisphere every year, why don't common bacteria adapt to extreme cold? People use soap or spray ...
2
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0answers
5 views

Archenteron vs Gastrocoele

What is Difference between “Archenteron” and “Gastrocoele”. Are they same or different? Gastrula is characterized by Archenteron or Gastrocoele or Both?
0
votes
0answers
22 views

Problems with plexus, ganglions

I don't know exactly what a plexus is. I have a book where is written that a plexus is an intramural ganglion. Could you please tell me what is a plexus? (Vegetative plexus)
0
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0answers
21 views

Current and Voltage to kill a cockroach

I am trying to build an electric device for killing cockroach infestation. What's the required current and voltage to kill a cockroach?
1
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0answers
8 views

Beyond anabolism, what are factors that restrict growth rate?

Beyond obvious constraints in the case of nutrient limitation, what can explain the relatively slow growth rate of cells in rich media? Lab strains of E. coli grow really, really fast. The cell ...
0
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0answers
6 views

Fastest viral cycle (in eukaryotes) and theoretical limits?

I could not find any comprehensive review about this; I'm interested in comparing the duration of viral cycles from the entry in the host cell to the release of a mature virion. In particular, I am ...
1
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0answers
29 views

Why did this Rabbit behave like this?

https://youtu.be/B3_S3Uj18G8 In this video, inappropriately titled autistic rabbit, we see the rabbit first lying motionless before suddenly starting to spin around and jumping around. What caused ...
2
votes
0answers
22 views

Transcription - strands, directions [duplicate]

I am hoping that you can help me improve my understanding of transcription. :) I have tried searching for the answers to all of these questions online already, but I have either had trouble finding ...
0
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0answers
22 views

How to model the effect of acid/base on pH [migrated]

I would like to model a biological compartment with sysBio R package. It is fine but I'm having a difficult time with modeling the change in pH due to acidosis. I tried several things like: ...
0
votes
1answer
27 views

What ecological niche do disk shaped fish exploit?

I looked up "Early Triassic" to get a sense of what that meant and I ended up on this image of marine life at the time. I noticed some disk shaped fish (#8 in the picture: Bobasatrania (durophagous ...
1
vote
1answer
28 views

What are the different types of helices in protein secondary structures and how do they differ?

What are the different types of helices in protein secondary structures and how are they differentiated? In the DSSP docs, types of helices mentioned are: Alpha-Helix, Helix-3, and Helix-5. In the ...
1
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1answer
36 views

Understanding transplant rejection - how does the cellular, adaptive, response get underway

This lay person is trying to get his head around the basic mechanisms of tissue rejection. A lot of articles talk about T-cells being involve but I'm having difficulty following this. Human tissue ...
0
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0answers
19 views

Is there a glossary about which infrared (IR) colors which body parts reflect?

I am doing medical research and I'm trying to find parts of the body that look about the same to the human eye, but reflect different "colors" in IR, so that using a light source and a camera of that ...
-2
votes
2answers
59 views

Why is photosynthesis described as a “physico-chemical” process?

In my textbook it is given that photosynthesis is a physico-chemical process. How can it be a physical process?
1
vote
0answers
40 views

How does the symbiotic bacteria reaches a human caecum

My thought on this matter is that we have got a very high pH of about 1.8 in our stomach.So,most of bacteria who came in through food or just open mouth should be killed by it.So,how does a bacterial ...
2
votes
0answers
49 views

Why can humans tolerate eating onions but other mammals like dogs and cats cannot?

Onions are one of the many foods we shouldn't feed our pets. Looking it up, I learned that onions cause hemolytic anemia in MANY species: cattle, sheep, horses, dogs, cats, and even some primates. If ...
1
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1answer
17 views

Maximum length for PCR amplification

Is there a recommendation for how long a target sequence for PCR amplification should be? If there is how do you amplify a target sequence that exceeds the recommended length?
0
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0answers
15 views

can a naegleria fowleri amobea live in a bottle of water?

I want to know if this amoeba can live in a bottle of water that has been storaged for 10 years? I brought a bottle of water from the town of Lourdes in France 10 years ago. they sell the bottles of ...
-2
votes
1answer
37 views

How long does an enzyme work?

I googled this, and I found only that shelf lives are around 2-3 years, but the enzymes use to work even after 5 years if you store them properly. I'd like to know how long I can use an enzyme in ...
0
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0answers
10 views

Typical concentration of oxygen for hypoxia and necrosis due to lack of nutrients

I'm a physicist and I'm interested in hypoxia due to the lack of nutrients at the center of avascular tumors. So I have a few questions about hypoxia. Below which concentration of oxygen and other ...
0
votes
1answer
36 views

Worm type bug inside of stick? What is it? [duplicate]

This bug was found on the wall of my closet in Seattle, Washington. It has been around 40-50°F lately, and it is winter. It looks like a tiny, brown, fuzzy stick/twig, but there is a hole through the ...
1
vote
1answer
47 views

What is this insect I found in my kitchen? [duplicate]

So I found this bug crawling around near my kitchen sink. There were two others, but not any sort of swarm. I think they're some sort of insect larva, as they don't have a bunch of legs like a ...
0
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0answers
66 views

Are there any social-behavioural differences between the biological sexes in humans “proven” to have an evolutionary basis?

Long story short: women are from Venus and men are from Mars. But how much of the differences arose from evolution and how much of it comes from Venusian and Martian cultural differences? Jokes ...
2
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0answers
21 views

What are haplotype blocks and what is the effect of hybridization on these?

In this PDF, there is a quick definition of haplotype blocks. A haplotype block is a set of closely linked alleles/markers on a chromosome that, over evolutionary time, tend to be inherited ...
-2
votes
0answers
22 views

why is BMI computed from mass and surface instead of mass and volume

Surface area of cube with size $a$ is multiple of $a^2$. The same holds for balls and any three dimensional object. Volume of cube is $a^3$. Volume of ball and other three dimensional object is ...
0
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0answers
20 views

What is the difference between saturated phenol and equilibriated phenol?

I was confused about phenol while searching it in the context of PCI solution (phenol:chloroform:isoamylalcohol 25:24:1) recipe. -First, what is the difference between saturated phenol and ...
1
vote
1answer
59 views

What's the difference between the neuroendocrine system vs endocrine system?

This is what I have understood so far: Neuroendocrine system involved neuroendocrine cells (also known as neurosecretory cells) that receive nerve impulses by a sensory neuron to release ...
6
votes
0answers
74 views

Where does Darwin state his “principle of multiple utility”?

I have never heard of Darwin's 'principle of multiple utility', but several papers refer to it. For example, from Darwin at the molecular scale: selection and variance in electron tunnelling proteins ...
2
votes
0answers
28 views

Were there any terrestrial species in the ancestry of all crustaceans?

To the exception of woodlice, Crustaceans live in aquatic (marine or freshwater) environments. Crustaceans are arthropods which is an immensely diverse taxon. Many arthropods live in terrestrial ...
0
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2answers
39 views

Can I change the genetics of a group of plants naturally?

I have been thinking about introducing all sorts of types to certain environments where the plants will have to adjust to survive. For example having a dark area with one light source right next to ...
0
votes
1answer
28 views

Why is cartilage replaced by bones in an vertebrae adult?

Why is cartilage present in a vertebrate embryo replaced by bones in an vertebrate adult even though cartilage can also provide me the structural framework like as in Chondrichythes and they seem to ...
0
votes
0answers
9 views

Why is snoRNA often used as a reference gene in qPCR?

I am studying non-coding RNAs and stumbled into a question about small non-coding RNAs. scaRNAs (small cajal body-specific RNAs) is a subtype of snoRNAs which are small nucleolar RNAs. It is known to ...
1
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0answers
18 views

If two substances use enzyme P450 to metabolize which one is metabolized first?

This is specific to Sertraline and Cannabidiol (CBD). Both substances use Cytochrome P450 enzymes to metabolize the substances but does one take over the other? Example. If someone took x mg of ...
0
votes
0answers
15 views

Data base or computational tool to help predict if two predicted interacting surface proteins are located on separate cells or on the same cell?

Is there any computational method or database with the help of which one could predict if two interacting cell surface proteins are located on separate cells or are located on the same cell surface?
0
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0answers
27 views

How can I extract DNA from horse hair?

For my project I have to find an inexpensive, quick and simple-to-use method to extract DNA from horse hair. The sample does not have to be purified because the sample will be used for LAMP and not ...
-1
votes
1answer
47 views

How many nucleotides in the DNA molecule? [closed]

Suppose I cut a human DNA molecule that was 6800Å long into 5 equal sized pieces using molecular scissors, how can I find out number of nucleotides in each of the cut pieces? Please give a bit ...
0
votes
2answers
46 views

Would prehistoric humans have been considered negroid or australoid by modern standards? [closed]

What are your thoughts about this? For myself I think that the subject statement is rather obvious isn’t it, since Africans, & especially Australian Aboriginals, have the most archaic features &...
0
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0answers
13 views

Population structure from mtDNA sequence data: A thought experiment

I have 5'-COI sequences for a species of interest, which were downloaded from the Barcode of Life Data (BOLD) systems. Assuming for the moment that the said species was sampled across its entire ...

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