All Questions

0
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0answers
3 views

How does the YfdM protein “release” the SW1 from the E. coli chromosome?

The Phys.org article Bacteria uses viral weapon against other bacteria says: The team, led by Thomas Wood, holder of the biotechnology endowed chair and professor of chemical engineering, Penn ...
-1
votes
0answers
13 views

T-test Lab Report [on hold]

I have done a lab experiment. I collected my results. My results are from females and males. I have been asked to do ANOVA and T-test. I did the ANOVA but I don't know how to do T-test because as far ...
1
vote
1answer
16 views

What species is this grey insect with red antennae and mouthparts?

I’m very curious to know whether this is a type of ant or not, I only see 6 legs. Found in Tampa, Florida near Tarpon Springs.
0
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0answers
10 views

I need help in understanding of how to show sex linkage [on hold]

How to show genotypes and phenotypes of the offspring from a cross where Red-green colour blond male ✖️ Heterozygous female [To show sex linkage, the allele for normal vision (N) is dominant to the ...
2
votes
2answers
23 views

Emergence of novel protein interactions by mutation of amino acids

Are there any examples of proteins that, without coming from a recent duplication event, underwent a mutation(s) that caused it to have a novel interaction with a new ligand, substrate, other protein ...
1
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0answers
12 views

Where can I find and download HMMTOP training set?

I would like to perform redundancy reduction for my test set for membrane topology prediction. I checked the 1998 paper and website of the HMMTOP server but haven't found any download links for the ...
0
votes
1answer
29 views

Is DNA from more parents (than two) better for the fitness of the offspring?

I'm designing a system (a computer system actually) and (a whole while ago) I spoke with a friend about it and he had this opinion: If you combine DNA of more parents (than 2) it's better for the ...
2
votes
1answer
22 views

What happens with the nitrogen in blood in membrane oxygenators?

The air we breathe consists of about 80% nitrogen and 20% oxygen. The oxygen gets diffused into the blood and CO2 out of it, the nitrogen does mostly nothing, as there isn't a partial pressure of ...
0
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0answers
8 views

what is the integral of PAR radiation over total solar radiation

This paper say 48%: What is the maximum efficiency with which photosynthesis can convert solar energy into biomass? -Zhu 2008 Also why does Zhu use 740 nm at high end of PAR wavelength! My ...
0
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0answers
12 views

Length of cell cycle dependancy on nutrients, pressure, temperature or other factors

How is the duration of cell cycle influenced by the concentration in nutrients, mechanical constraint, temperature or other factors ? And can it change strongly ? Meaning there are 2 possibilities, ...
0
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0answers
8 views

What is the advantages of using single primer in PCR ( Being found in library preparation step of Smart-seq2)

I am curious about the advantages of using single primer in PCR. I found this strategy in single cell sequencing method Smart-seq 2. Will it raise the yield of PCR? If so, Why? Does anybody have ...
0
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0answers
7 views

Ultrasound Imaging - Reading an M-mode image

This is an M-mode ultrasound image of a carotid we took in lab-class. I know from my lab manual that M-mode reveals changes in the positions of structures along a particular A-scan line as a ...
-3
votes
0answers
26 views

G3P, GP and GALP

Are these three molecules all the same thing? Also, where does TP fit into the picture? I was taught GP and G3P were the same thing, which gets reduced to TP Many thanks
1
vote
0answers
39 views

Muscle Question

A GP is neurologically assessing a patient. A stretch reflex is carried out in the biceps muscle group whilst the patient is relaxed and produces a modest reflex response. The GP then asks the patient ...
1
vote
0answers
37 views

Does the molecular composition of human body change after a period of time?

I was discussing change in human biology over time and my two in-laws charged in saying, "we're molecularly different after x". I didn't pay attention to what time period they exactly mentioned (hence ...
0
votes
0answers
9 views

What is the outer boundary of oligodendrocyte myelination?

The sensory and motor neurons comprising the spinal cord and brain stem have the interesting property that different structural components belonging to the same neuron can occupy both the PNS and CNS. ...
0
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0answers
17 views

PCR in different cell line

I developed a PCR cycle to amplify a 5.5 kb genomic DNA region in HEK cell line. When I tried to use the same protocol in A375 cell line I had no results but only smear. Can you help me? Thanks in ...
-2
votes
0answers
17 views

How to solve tgie [on hold]

How to find the solutiin.how can we find the non parental offsprings in the f2 generatiin in polygenic inheritence.
-1
votes
0answers
23 views

Why isn't dense irregular connective tissue in the book I'm reading?

I'm reading a book, Anatomy and Physiology from Barnes and the Noble Outline series, and it lists four types of connective tissue. They are mucous, fibrous, reticular and adipose. It devides fibrous ...
0
votes
1answer
11 views

How would two SNPs interact to affect CYP3A5 gene activity?

If someone has a non-functional rs41303343(T;T) SNP, yet that individual also possess the partially functional rs776746(A;G) SNP, is their CYP3A5 genotype functional or nonfunctional? In other words, ...
0
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0answers
16 views

Does the human body absorb any of the humidity in the environment when dehydrated?

I was walking in the rain and feeling thirsty, and I wondered if when the human body is dehydrated it does absorb any of the humidity in the environment by itself.
4
votes
2answers
282 views

What is the best argument for maximum parsimony method in phylogenetic tree construction?

Beside the fact that maximum parsimony is computationally cheap, what other good arguments are there for it? Is there any model behind this principle? Why would one expect this principle to provide ...
0
votes
2answers
26 views

After how many hours water drunk is expelled from the body?

If one drinks a liter of water at 7 am when (in what span) will that water be eliminated through uresis? Is that process influenced by any factors such as empty stomach, sleep or other?
0
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0answers
11 views

How are drugs distributed in regards to bone marrow?

I know that as volumes of distribution increase they correspond to the blood, then the vascular rich group (heart, kidneys, liver, brain if BBB permeable), then muscle then adipose. But things like ...
0
votes
1answer
28 views

How to do a nucleic acid or genome and amino acid search [on hold]

I have been looking to find a database where i can search for genome and amino acid search. Are there any open source databases available for the same.
0
votes
1answer
38 views

Why are babies rarely born with cancer?

Childhood cancer is fundamentally a disease of dysregulated development. Why does it rarely occur during the fetal period, a time of enormous growth and development?
0
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0answers
13 views

Why are viruses considered to be non-living? [duplicate]

Viruses are widely known as disease and illness-causing agents that can spread quickly through living organisms. They are considered to be non-living due to their unique characteristics.
-1
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0answers
24 views

Using high risk pregancy to advantage [on hold]

If a woman over 40 having a child with increased risk of the child having down syndrome decrease the chance of that child developing cancer later in life?
0
votes
0answers
19 views

Why does one have to be alive to donate stem cells? [on hold]

Even after The body dies ( meaning the heart has stopped pumping) some cells continue to generate weeks afterwards. So why is that you need to be alive to donate stem cells?
-2
votes
0answers
17 views

Can a human survive a sting from Androctonus Australis sting? [on hold]

So my question is their any treatment for Androctonus venom or do you just have to wait it out, or do you just die from it?
0
votes
0answers
9 views

What is the difference between numerical and phylogenetic taxonomy? [on hold]

I am a 15 year old boy,who started developing an interest towards biology recently. I am interested in these two schools of taxonomy. Thank you for all the answers!
0
votes
0answers
9 views

Is it possible to make an estimate of how many species extincted before humans?

This article Species Extinction Happening 1,000 Times Faster Because of Humans? makes an estimate of the rate of extinction now and 200,000 years ago. I know it's difficult but since there are ...
0
votes
2answers
18 views

Are SNPs always in linkage disequilibrium with other SNPs

Is it possible to have a SNP that is not found is be non-randomly associating with any other SNP?
-2
votes
1answer
35 views

How much does biomagnification affect human beings?

It is known that the effect of biological magnification increases with higher trophic levels. Since, we are at the top of the food chain, how much are we affected by it? Is there any proof of humans ...
0
votes
1answer
20 views

Coronary circulation

It is said that the coronary artery that gives the posterior descending artery(PDA) determines if the heart is right dominant(most cases) or left dominant. Is there any reason to this? Why PDA?
0
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0answers
16 views

How do I homogenise a small pellet of 10 to 50 cells within less than 50 µL?

I have a problem with declumping/ homogenising bacterial cells in small volumes (10 to 50 µL). I know that I can get all of my cells out of the tube, but they are still stuck together and won't form ...
-1
votes
0answers
52 views

How do people get golden blood type?

The RHnull phenotype is characterised by a complete lack of all Rh antigens (source). Because it is so rare, it is sometimes called "golden blood type". The authors of the linked paper state that: ...
-1
votes
0answers
8 views

What software is similar to STRAF, Structure and R Geneland for ethnography and forensic haploid Y data?

What software is similar to STRAF, Structure and R Geneland for ethnography and forensic haploid Y data? Does anybody know a better and more functional choice?
1
vote
1answer
27 views

When are neuropeptides loaded into vesicles?

It is well known that small neurotransmitters like monoamines (dopamine, serotonin, etc), acetylcholine, glutamate, etc are loaded into vesicles at the axon terminal. Stated differently, synaptic ...
0
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0answers
40 views

How many nutrients do trees process daily?

Is this tree fact below that I have found on social media sites true? I don't know the source of the quote. It's pretty amazing. I'll be glad if someone can provide the source too! Natural Wonders ...
0
votes
0answers
30 views

How are electrical properties differently applied to the soma of a neuron and the axon of a neuron? [on hold]

I have provided two pictures to help clarify my question: As you can see from the above two images, the values in the two tables are the exact same. Summarizing, the larger soma and larger myelinated ...
0
votes
1answer
31 views

Animal reproduction when resources are scarce

(This question is aimed at animals that take care of their young, e.g. dolphins.) As I understand it, most animals reproduce if possible. The only way they don't is because they run out of resources. ...
0
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0answers
12 views

Trophic levels and energy loss

Just a general question about trophic levels. Traditionally, it's thought as much as one order of magnitude of energy is lost as one moves from trophic level to trophic level. I am confused here since ...
-1
votes
0answers
18 views

In theory, how would genetic engineering of certain genes affect morphology/phenotype of individuals in adulthood? [on hold]

Say we get to the point where we then can identify all of the correct genes/combination of genes and etc. that are responsible for things like zygoma, maxilla, mandible, frontal bone, etc. shape (...
0
votes
0answers
38 views

Monkey Grip Procedure?

Question: Neurophysiological basis (i.e neuronal/axonal activity, synaptic behaviour) of how the monkey grip procedure performed about the arms is able to cause a greater stretch reflex response in ...
-3
votes
0answers
23 views

To what extent is the angle of the mandible genetic vs. epigenetic?

Is there any scientific literature or studies that can confirm whether the angle of the mandible and/or gonial angle are more strongly influenced by genetics or epigenetics, AKA puberty/hormones/...
-3
votes
1answer
24 views

A speculative question about sensation

I know this is rather speculative and I am not a biologist, but I have womdered about this for a long time. I have always been able to pinpoint the central line of any part of my body exactly as if ...
-2
votes
0answers
9 views

Simple models of menstrual hormone levels

Are there any simple models available that can predict hormone levels (e.g., estrogen, progesterone) over the menstrual cycle? It would be nice if these were already implemented in Python, but any ...
0
votes
0answers
11 views

Pits, symplastic or apoplastic pathway?

After water has moved through the endodermis through the Casparian Strip, water continues to move down the water potential gradient into the xylem vessels through the pits, is movement through the ...
2
votes
1answer
13 views

Formula for Oxygen Consumption for Atlantic Salmon (Mathematical) - insecurities regarding variable

The oxygen is calculated in mg per kg per something, so what does $h^{-1}$ stand for? hours maybe? The formula given below is an estimation of oxygen consumption for Atlantic salmon \begin{...

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