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4 views

Any clue on what these tiny white bugs may be?

i would like to know what the bugs in the following pictures, i'm sorry for the quality but they are absolutely tiny, i would say 0.5mm at most, i can't get a sharp picture even with my note 10+, as ...
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2answers
11 views

Some queries about the characteristics of the DNA of Jesus [closed]

On the assumption that Mary really was a virgin, but Jesus was nevertheless fully human, I was wondering if there is any biology expert who might have an idea of some of the properties of Jesus' DNA? ...
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5 views

What is the significance of running an uncut plasmid on electrophoresis gel?

What is the significance of running an uncut plasmid on electrophoresis gel? In this case we are talking about inserting a gene into plasmid, which then goes under PCR and then electrophoresis.
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4 views

Some related questions about DNA differences in a single organism

If you took a DNA sample from someone's brain and that same persons liver at more or less the same time, would that DNA - all else being equal (ie no mutations from radiation or smth) - be exactly the ...
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0answers
5 views

Why amylopectin gives brownish color in presence of iodine?

The iodine test used to determine the presence of starch. Amylose gives darker color in presence of iodine because iodine becomes polyiodide which electron exceptor and amylose becomes electron ...
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1answer
12 views

Meaning of some unit of measurement of kinase activity

I need help knowing what $cpm \times 10^3$ means in Figure 4(C) of this paper (https://www.sciencedirect.com/science/article/pii/S0022202X15323149#f0010). It appears to be a unit of kinase activity.
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0answers
10 views

How to estimate oxygen consumption of an average human during different activities?

I've tried to find some resource on the internet but had little luck. I'm looking to see if there's any data on average oxygen consumption of average to well trained humans during different activities....
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0answers
5 views

Need help interpreting Western blot data

So the paper I am reading (here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7094582/) uses densitometric units to quantify the western blots. Questions: The way I understand it is, in the figures ...
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1answer
6 views

Questions about Cohesin - what does the ATPase domain do, and any suggested PDBs to look at?

I've been reading about cohesin lately, and I'm confused about the head subunit interactions. I've read a few papers, and also found this nice figure from wiki that demonstrates the crux of my ...
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1answer
15 views

Do immune cells die after attacking pathogens?

For an example; During an inflammatory response, macrophages and neutrophills infiltrate into the damage site from the blood and attack the microbes by engulfing them. After this is accomplished, do ...
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1answer
9 views

What is mitochondrial run length?

I am reading the following journal paper and I have come across the following statement: Overexpression of GSK-3β significantly increases motile mitochondria in a Tau protein-dependent manner. ...
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0answers
7 views

What is the relationship of stimulants to hair loss?

I've noticed several topical hair loss products (ex: minoxidilmax) add caffeine to their recipes with the claim that "caffeine stimulates blood flow to the scalp" thereby improving hair ...
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0answers
15 views

Would there be more amino acid residues in the extracellular or intercellular space?

I am working on a bioinformatics project with HMMs and want to write some initiation probabilities for the location of amino acid residues. I know for different transmembrane proteins there will be ...
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7 views

Are oospores (of oomycetes) endogenous or exogenous? What are chlamydospores and in which class of fungi do they belong?

I do know Chlamydospores are asexual spores but in which class of fungi are they seen often and are they exogenous Or endogenous?
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1answer
18 views

Water snake with a yellow criss-cross on a black background?

I saw a 60 cm long, very skinny (~15 mm diameter), black with yellow diagonal criss-cross patterned snake swimming in a pond this afternoon in northern Taiwan. It was swimming near the top of the ...
-3
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1answer
37 views

Reproduction in animals

Humans have acquired knowledge about their environment through many observations. Today, humans have wide variety of resources to gain knowledge about reproduction in human beings and other ...
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1answer
22 views

Why is a solution of cesium chloride used in Meselson & Stahl's DNA replication experiment?

Centrifugation involves separating particles of different sizes, masses, density and etc. In the experiment, the DNA macromolecules are suspended in a solution of cesium chloride gradient and then ...
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0answers
40 views

Can someone identify this worm?

The first time I saw these was in an old cooler full of water by my shed, there were 3 of them about 2 weeks ago. Now tonight I found one crawling up my door. Can anyone offer some insight? I have ...
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2answers
38 views

Destroying RNA of viruses using Ribonuclease

I wonder if it is possible to design some Ribonuclease to destroy only specific RNAs (like those of viruses). Then, if virus tries to infect, his RNA will be cut. Or, instead of creating Ribonuclease, ...
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0answers
9 views

Is fucus filamentous or colonial algea?

Am a bit new to biology SE. My question is wether fucus is filamentous or collonial form of algea?Does a form of algea have to be collonial or fillamentous or it can be something else? https://en.m....
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1answer
33 views

When there is incomplete dominance of one allele, is one allele still considered recessive?

When you have incomplete dominance between two alleles of a gene (say, on two different tail lengths blending into an intermediate tail length or two rose colours blending together), can you still ...
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0answers
16 views

Dominant species in tundra

What are the dominant plant and animal species in the tundra biome? I searched this up and I found the following: Herbivorous mammals: lemmings, voles, caribou, arctic hares and squirrels. Carnivorous ...
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0answers
24 views

Is there a color changing organism that is by default translucent or otherwise “colorless”?

To illustrate a point I am trying to make in a paper I am writing it would be helpful to have an example of an organism that by default has "no color" but which can adopt the color of ...
2
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1answer
34 views

Examples of real biological applications of the Keller-Segel system

I am working on a model of aggregation behavior modeled with the Keller-Segel PDE system. I recently gave a talk on this and was asked what other examples there were of the Keller-Segel system. Since ...
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2answers
41 views

What does γ mean before a gene name?

I am reading the following paper and I have come across the following statement: It has been demonstrated that the phosphorylation of histone H2AX-Ser139 to form γH2AX. I am not sure what the γ ...
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1answer
13 views

Are the IRV and ERV equal in amount?

I am reading about Inspiratory Reserve Volume and Expiratory Reserve Volume in my textbook. So my general question is aren't the two terms show the same amount of air ? I would like to tell you why I ...
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0answers
19 views

The position of the macula in comparison to the blind spot

See these two images and compare them: Which is located in a higher postion? Macula or blind spot?
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0answers
16 views

What stops myosin during muscle relaxation?

I understand that when the muscle is relaxed tropomyosin blocks myosin binding sites on actin filaments thereby preventing muscle contraction. What I am concerned with however, is whether myosin ...
5
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1answer
53 views

How many times did photosynthesis evolve?

Was it a 1 and done thing? Plants seem to have developed photosynthesis by the endosymbiosis of cyanobacteria. Is the latter the one time in Earth's history that the process independently came about? ...
2
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2answers
46 views

Which fish did modern tetrapods descend from?

Did modern tetrapods descend from Tiktaalik or Ichthyostega? While I understand that in terms of all tetrapods, the lineages of Tiktaalik and Ichthyostega both would be included, but I want to know if ...
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0answers
23 views

Difference between haemocoel and coelom

I am really looking for some EMBRYOLOGICAL PERSPECTIVE . I know about coelom derivation but i want to know how haemocoel is derived and how it is fundamentally different from coelom. true coelom is ...
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0answers
51 views

Plants with nutritional requirements similar to Cannabis

What are some short plants that preferably could be grown indoor which have similar nutritional requirements (in terms of N-P-K ratio, doses etc.) as Cannabis? The purpose of this is testing a mineral ...
3
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1answer
48 views

What arthropod is in the picture?

I am from Philippines and I found this in my room. This arthropod has 6 legs and have a bit long Chelicerae like spiders that can fold to hold its food. It's about half an inch long. It also looks ...
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0answers
38 views

What property of water explains how sweating helps the runner continue running?

My question I have to answer is: A runner picks up pace on a warm day and starts sweating profusely. What property of water explains how sweating helps the runner continue running? The following are ...
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0answers
22 views

'Big ideas' behind constrained selective breeding (optimization)

I'm looking for help in finding the 'big ideas' behind a project I'm beginning and want to make sure I'm not missing anything since I wasn't trained in Biology. My idea is investigating constrained ...
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0answers
65 views

What are these clear sacs all over my house and coming out of my faucet?

I live in el Monte California which is in southern California. I keep finding these egg like sacs on my floor and on everything in my apartment. They are coming out of our water faucet in every room. ...
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0answers
19 views

How much ribose do we eat?

I am wondering how much ribose we ingest as food? Ribose is found in the backbone of DNA and RNA. So, we eat ribose as part of the nucleic acid found in plant and animal foods. While protein, lipid, ...
3
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1answer
65 views

A mutation question from the Indian National Biology Olympiad

DNA was isolated from wild type (Gal+) and mutant (Gal-) E. coli cells and separated by density gradient centrifugation technique. DNA from Gal- strain acquired a lower position. This indicates that ...
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0answers
19 views

Commercial suppliers of cloned vectors?

I am a recent transplant from academia to industry. I would like to follow-up on some experiments in the literature, for which I need cloned plasmids. Addgene of course doesn't (for the most part) ...
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1answer
48 views

Hardy-Weinberg principle

The following paragraph on Wikipedia about the Hardy-Weinberg principle is bothering me. It should be mentioned that the genotype frequencies after the first generation need not equal the genotype ...
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0answers
16 views

What is the rate of bacterial cell death due to viruses on land?

"The rate of viral infection in the oceans stands at 1 × 10^23 infections per second, and these infections remove 20–40% of all bacterial cells each day." - https://www.nature.com/articles/...
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0answers
23 views

What would it take for the cordyceps fungi to successfully infect a human and produce the same results as it does in insects

I know that as of now cordyceps are unable to infect humans due to our immune systems being much too strong to be overcome by it. But how much genetic difference separates a parasite that doesn't ...
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0answers
16 views

question on brain dissection

I was dissecting a sheep's brain for my students and one of them asked a question about the corpora quadrigemina he asked why did two of them(the superior colliculus) look more red than the other two ...
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0answers
24 views

How does muscle contract, according to sliding filament theory?

Recently, I was taught in class the sliding filament theory, in which myosin pulls the actin filament inwards. Since Z lines are attached to actin from both sides, it recives pull from both side by ...
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0answers
21 views

Does any tendon in humans receive a high amount of blood supply? Or is the property of not receiving a large blood supply a constant across tendons?

I read on https://www.physiocomestoyou.co.uk/blog/all-you-need-to-know-about-tendons/ (mirror): [Tendons] do not have a large blood supply. Does any tendon in the human body receive a high amount of ...
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2answers
57 views

Question about probability of being a heterozygous carrier

A 26-year-old woman of Norwegian descent seeks genetic counseling. Her brother died at age eight of documented cystic fibrosis. Both of their parents are deceased. The woman undergoes DNA testing for ...
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1answer
29 views

Where can I find information on the anatomy or biology of seeds?

Where can I find information on the anatomy or biology of seeds? For example if I want to know the anatomy (some sort of drawing) of a green bean where can I go to find such information? Searching ...
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0answers
38 views

Would a plant survive in a 100% CO2 environment provided it has constant sunlight at all times?

I was looking up "do plants need oxygen" because I was confused and came upon this comment: "Basically, they need to breathe oxygen to survive, like we do. But they can also use the sun ...
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0answers
19 views

Aerosolised particle released during autoclaving

During autoclave heat-up, the inside chamber's air is released in order to be displaced by steam. Because of that, many modern autoclaves are equipped with filters at the release outlet. The ...
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1answer
41 views

Is life in the open ocean homogenously spread?

Obviously around land masses or in shallow water where reefs and coral may grow, life is diverse and numerous. But how spread out is sea life in the open ocean (for example, half-way between Hawaii ...

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