0
votes
0answers
11 views

Why does anaerobic microorganisms cause fetid smell in respiratory secretions? [closed]

This is always given as a fact. But I've always wondered about the reason.
2
votes
0answers
20 views

Can a stationary eye with a moving pupil exist? [closed]

I am making a sci-fi web-comic set on an alien world and I thought up an idea for an eye that works much like an eye from a mammal, but instead of moving the whole eye, only the pupil moves. This idea ...
3
votes
1answer
12 views

Is disease transmisson through milk consumption or meat consumption considered direct or indirect transmission route?

From an epidemiological point of view, is consumption of raw milk or meat considered as indirect or direct transmission ? Let's take the example of bovine TB. Is consumption of unpasteurized milk ...
10
votes
2answers
639 views

Why are potassium channels slower than sodium channels?

I am relatively new in the subject of biology. I have a strong mathematical background and in order to get into the field of computational neuroscience, I am trying to get some biological background. ...
0
votes
0answers
17 views

Relations of Watson & Crick work and Meselson & Stahl [closed]

It is said that Watson & Crick postulated the DNA model,does this make Meselson & Stahl (which found out that DNA is semi-conservative) contributed to enhance the postulate by Watson & ...
0
votes
0answers
15 views

Function and Mechanism of Height Genes

I have an inquiry regarding the exact function of height genes. To my knowledge, although they are heavily regulated by epigenetic factors, height genes can have either an "on" or an "off" allele, ...
5
votes
2answers
432 views

Why can humans feel electricity?

What evolutionary process has provided humans with the ability of feeling electric current? Besides lightning and electric eel, what natural hazards include electricity that poses a threat to humans? ...
0
votes
0answers
11 views

Web repository to predict secondary structure of protein the the form of H C and E

Is there any website which would take in as input multiple amino acid sequences and output the secondary structure in the form of H(helix) C(coil) and E(strand)? I found this website but it cannot ...
-1
votes
0answers
17 views

How to conduct a new protocol for antibody sequencing? [closed]

I will start a new protocol for antibody sequencing. Does anyone has already did it? What's the right procedure to do it? I don't know what dilution to do with my experiment.
0
votes
0answers
24 views

Meaning of 'forms of free energy'?

I was doing a practice exam paper and it asked for different 'forms of free energy'. I am a physicist rather then a biologist so 'free energy' to me means Gibb's Free Energy: $$G=H-TS$$ But I cannot ...
3
votes
1answer
256 views

hummingbird feeders - is sugar water healthy for them?

The top results on google for DIY hummingbird feeder suggest a white-sugar solution for the feed. In humans we make a big deal about processed sugar vs. the sugar you get from, say, eating a piece of ...
0
votes
0answers
19 views

Why food is spicy in tropical countries? [closed]

Generally, the food in tropical countries is spicy as compared to other parts of world, Why is it so ? Is it because of Climate, Types of microbes, nutrition requirements or some totally different ...
2
votes
1answer
28 views

Staining cells for FACS at 4 degrees or ambient temperature

I'm sorting a 293 derived line. One thing that is worrisome for me is cell viability after the sort. Usually I have been staining and washing at room temperature (on the benchtop) on a nutator. I have ...
1
vote
0answers
9 views

How did the double circulatory system evolve from the single circulatory system

I already learned how the mammal circulatory system (double circulatory system) evolved from the reptilian circulatory system. How did natural selection evolve the reptilian circulatory system and the ...
2
votes
0answers
82 views

Can flow cytometric analysis differentiate between a parent contributing longer chromosomes versus multiple smaller chromosomes?

For flowering plants, can flow cytometry of seed from muti-generational interaction of two species and their offspring help us decide if wide differences in genome size for the two species and their ...
2
votes
0answers
20 views

Can mutation rate be increased for instance by mutagenesis targeting the DNA polymerase?

I am studying a non-cultivable bacterium living in an insect host, and I would like to generate some random mutants of this bacteria while preserving the insect. I am wondering if one way to do so ...
5
votes
3answers
61 views

How do birds avoid mid-air collision?

Across from me there is a large flick of Pigeons and Ravens that like to nest on the roof. They swoop and dive and fly all over. Sometimes the whole flock lifts off at once. My question is, how do ...
0
votes
0answers
11 views

Online Database for PPG (Photoplethysmography) signals (both Infrared and Red light readings)

I am looking for an online Database for PPG (Photoplethysmography) signals for SPO2 (oximetry) analysis. I have tried several sources but they only have single datasets labelled "PLETH" and not ...
2
votes
1answer
37 views

The heart of a Pigmy Shrew beats 1300 per minute then why is it so fast?

A pigmy shrew is such small animal. Even with such fast heart beat their average life span is 1.5 years. So can we consider faster heartbeat not good for health?
0
votes
0answers
13 views

method for DNA extraction for human mucus(nose) or earwax?

What is a simple method for extracting human DNA from nose mucus or earwax? I tried googling for methods for DNA extraction for human nose mucus or earwax and couldn't find any. I assumed that if one ...
0
votes
1answer
33 views

Do RBCs need oxygen?

How do our red blood cells (RBCs) get oxygen? Do they even need it? They have no nucleus and no organelles, so I think they don't need it.
-3
votes
0answers
20 views

Why plants can not photosynthesize in presence of artificial light? [duplicate]

Why can't plants photosynthesize under artificial light? It is said that plants show max rate of photosynthesis under blue light . So if we provide artificial blue light why can't the photosynthesize? ...
1
vote
0answers
22 views

There are 6 classifications of CFTR mutations. Is a causal relationship to the sweat test known?

Cystic fibrosis (CF) is caused by mutations in the gene for the protein cystic fibrosis transmembrane conductance regulator (CFTR). The CFTR mutations are classified in 6 classes. The sweat test is ...
5
votes
2answers
38 views

Is it possible there were multiple origins of life? And, if so, why did the one which became the common ancestor between all organisms prevail?

I have learned that all currently-living organisms come from a common ancestor, which I theoretically understand. However, my professor in a class mentioned that there is a chance that there were ...
2
votes
1answer
10 views

How and why are cells irradiated in human-rodent hybrid cell biology?

When human-rodent hybrids are made the amount of human chromosome in the hybrid can be reduced by irradiation. Why and how exactly is this irradiation step performed?
1
vote
0answers
23 views

What happens when we eat excess fat?

The fats in our body are stored in fat cells. When we over eat fats does the size of our fat cells increase, are more fat cells generated, or do we "throw out" excess fat?
8
votes
3answers
113 views

Do biological phenomena follow Gaussian statistics?

I have recently entered the life sciences (from physics). I am concerned about the use of p values in the life sciences literature. For example, in this article, they test 9 - 12 rats in a control ...
1
vote
0answers
40 views

How does the brain store information? [duplicate]

In all electronic devices with the possibility of saving there are tiny magnets that can store your data by the state they are in. In general, there has to be something changed to store information ...
3
votes
2answers
42 views

Organ donation compatibility based on DNA

As far as I know, multiple tests are made before organ transplant to determine matching. Would it be possible to do the matching based on the DNA of the patients, rather than the actual serum ...
2
votes
0answers
13 views

How does the ascending neural pathway filter unimportant information?

In school they told us one of the functions of the ascending neural pathway is to filter unimportant information. But the neural signal I know is only chemical-electrical neurons chain reaction. Is by ...
0
votes
0answers
46 views

Can saltwater fishes theoretically survive in sugar water (not fresh water)? [closed]

If a sugar water has similar concentration as saltwater can fishes live in it?
0
votes
2answers
23 views

If a given DNA oligo is an aptamer, will the corresponding RNA oligo with the same sequence be an aptamer aswell?

Functionality of aptamers depends upon the oligo's sequence and secondary structure. So, if I take a DNA aptamer and make an RNA oligo of the same sequence (T replaced with U obviously), will this RNA ...
1
vote
1answer
19 views

Why might food go bad in an oxygen-free environment?

I was recently watching a video from the International Space Station (Making a peanut butter sandwich in space), and I noticed he mentioned that a tortilla kept in an oxygen-free environment could ...
2
votes
1answer
36 views

Why are VAL, MET and ALA substitutions commonly used for protein behaviour and function studies?

I have seen that amino acids are commonly replaced with VAL, MET or ALA to study the effects of these specific substitutions. Why are these specific amino acids used in particular, what are the ...
-2
votes
1answer
68 views

Why Most of Birds jump instead of walking? [closed]

Why do most birds jump instead of walking when they are moving on the ground?
3
votes
3answers
53 views

Is RNase AWAY in the lab dangerous?

I use RNase AWAY in the lab. I would like to know how dangerous this chemical is for health. For example, when I remove my gloves my hands smell because of the RNAse AWAY
1
vote
0answers
31 views

what is this ant-sized black insect? [closed]

I have found these tiny ant-sized black bugs on the floor that are a little hard to kill; I have to hit them with so much force otherwise they stick to the back of my sandals alive! or i have o ...
-1
votes
1answer
36 views

definition of phenotype

I'm no biologist but I'm trying to enter molecular biology from a perspective. I notices that genotype is quite well defined and phenotype not as well. If I understand well, gene expression builds up ...
1
vote
0answers
40 views

Why do we turn darker in the sun?

I tried the all powerful google to answer this question - but I am not getting the answer I seek. I know we turn darker because the skin produces melanin. The question remains - why darker? I am a ...
-1
votes
0answers
13 views

Uses of cell pellet after passaging? [closed]

For what purposes can I use cell pellets of HeLa cells obtained after passaging? In general what options are there? Are there anything different use for primary HeLa cells and these ones?
3
votes
0answers
14 views

Do ginko trees grow well in Eastern North America (specifically Ontario,Canada)

I have recently noticed many Ginko (Ginko biloba) saplings planted in my Eastern Ontario city (in Canada), and they are looking a bit sickly, with yellow leaves. They seem to be a popular choice in ...
0
votes
0answers
13 views

Diffuse DAPI staining after time in tissue

My student is using ProLong Gold with DAPI (premixed) on sheep uterine tissue. We have used this reagent for some time with great results. Now, when she finishes her immunofluorescence protocol, ...
0
votes
0answers
8 views

Is it possible to quantify fluorescent microspheres with a Qubit Fluorometer?

I realize this isn't what the Qubit was made for, but I'm wondering if there's a way I can adapt it to work with fluorescent microspheres. It seems like it should work as long as I use microspheres ...
1
vote
1answer
37 views

Why do we spend so much time on creating taxonomies? [closed]

I spent 3 years building a taxonomic database of plant specimens for the Missouri Botanical Gardens (http://www.tropicos.org/). Myself and two other programmers used a modern database and web pages to ...
3
votes
1answer
20 views

Why does low sequence diversity cause sequencing problems

When sequencers are processing sequence fragments, if there is little diversity at a particular bp locus this can cause problems for the sequencer. I have the superficial understanding that when a ...
3
votes
1answer
34 views

What happens to the excess immune cells or WBC in our body?

When we have an infection our immune system produces a large amount of white blood cells (WBCs) in our body to fight against the pathogen or parasite. My question is after the immune response has ...
1
vote
1answer
25 views

Why can't gametes of one species fuse with that of the other species?

I have read that gametes of one species cannot fuse with that of another? For example the sperm of a dog can't fuse with the ova of a cat or a horse?
-1
votes
0answers
30 views

Can one mother have a white and black baby twins? [closed]

I was reading a news and found that one American white mother had two babies out of which, one was black and other was white. The mother was demanding that both of the children were her but the ...
1
vote
1answer
58 views

Doubts regarding definition of upstream/downstream genes and cognate protein

With respect to the research paper, there are a few things I didn't understand: 1. What is upstream and downstream gene 2. This paper identifies proteins that help in secretion, but does not identify ...
1
vote
0answers
18 views

Source of journals collecting titles of scientific publications regarding clinical trials with dogs fed medicinal herbs

After some time researching on the web, you can find a lot of websites telling you that some herbs may have or have specific properties(unfortunately most seem to be "advertised" as if they were ...

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