0
votes
0answers
1 view

What is the lowest temperature an organism can survive?

It seems that reproduction isn't possible below -20°C, but bacteria can be store well below that. What is the lowest temperature a microorganism can be stored, theoretically and experimentally? I ...
0
votes
1answer
5 views

TRANSFAC Matrix.dat retrieve count matrix using BA field

In the TRANSFAC Matrix.dat most of the motifs are given in the form of count matrix, but a few of them are given as some kind of frequency matrix. Those aren't ordinary PWMs because rows don't sum to ...
0
votes
1answer
7 views

iPSC in drug discovery

Pluripotent stem cells are very popular and lots of research has been conducted to use these cells as a tool for drug discovery. My question is how many years would it theoretically safe is we could ...
1
vote
2answers
50 views

Genetic mutations and new alleles

Amongst silent, nonsense and missense genetic mutations, is the latter the only one that leads to the creation of new alleles? If we define alleles as a specific form of a gene, and a gene as a ...
0
votes
0answers
9 views

Are there any reliable studies about colors and emotions? [migrated]

It is rather common knowledge that black and yellow indicate danger, blue trust, green and red appetite, warm colors warmth, and cool colors cold. Please, recommend me any studies or literature about ...
0
votes
0answers
9 views

Tango receptors in worms

Do all parasitic Worms (parasitic platyhelminthes and nematodes) lack tango receptors? I read that the parasitic nematodes lack tango receptors on the surface of their body. Is this true for all the ...
0
votes
0answers
14 views

Is it legal to send animals for near spaceflight research? [migrated]

For biology purposes, is it legal or not, like using crickets and mouse as subjects to be sent near space (Upper Stratosphere) High Altitude Balloon
1
vote
0answers
15 views

Can you replace glucose with glycerol in cell media?

In order to feed an animal cell in process called Respiration, can I replace Glucose with Glycerol? The Equation bellow: Glycerol + Oxygen -> Water + Carbon Oxide
0
votes
0answers
15 views

What a cell needs to survive? [on hold]

I'm looking specifically at animal cells. I'm not sure if it needs only Glucose and Oxygen for Aerobic respiration.
0
votes
0answers
17 views

If your atlas is out of alignment, will the rest of your spine be out as well?

I just found out about this association called Nucca. Basically, they are a chiropractic association - their whole idea is that if your atlas is out of alignment, then the rest of your spine is also ...
-3
votes
0answers
25 views

Can large snakes eat a person?

I was wondering if you could tell me whether it is possible for a very large snake like a python or an anaconda to eat a person, i.e., an adult or young male. If it did manage to swallow them what ...
1
vote
2answers
24 views

What is a “homologous pair” of chromosomes in cross joining or cross over?

I never understand if the chromatids attached at the centromere is a homologous pair, or the male and female chromosomes?
0
votes
2answers
41 views

What is meant by “Expression” of Non-Coding RNA?

I was having a look at lncRNAdb and its help says: The ENCODE project gene annotation list, GENCODE, has predicted that the human genome contains 14,470 lncRNAs whereas only a small proportion of ...
7
votes
4answers
817 views

Why would lethal genes evolve?

I've been reading through 'The Selfish Gene' by Dawkins. At a few places in the book he states that incest is damaging because it would give a very high chance of lethal recessive genes becoming ...
0
votes
0answers
16 views

Why GH is tropic and non tropic?

I was wondering why Growth Hormone (GH) has both a tropic and a non tropic effect. Maybe it does have a tropic effect because it stimulates the liver to secrete insulin-like growth factors (IGFs), but ...
0
votes
0answers
9 views

SSR Association Mapping [on hold]

I do association mapping of SSR with the help of the bioinformatics tool "Tassel v 2.1". Can any one tell me about Ls Mean in GLM. Actually, when I click on "add Ls Mean data" for output the software ...
1
vote
1answer
20 views

Is there a difference between “Alpha Helix” and “Alpha subunit”?

In my biochemistry textbook the terms alpha helix and alpha subunit are both used. Are these two terms synonymous? For instance, hemoglobin has an alpha and beta subunit, are these the same thing as ...
-1
votes
0answers
14 views

peritoneal dialysis Vs Hemodialysis?

Their are basically two types of dialysis: 1.peritoneal dialysis 2.hemodialysis, My Question is Why the peritoneal dialysis needs to be carried out on everyday BUT hemodialysis is carried out on only ...
0
votes
0answers
15 views

Complementing back the expression of a knockout gene

I have a human cell line in which a gene has been knocked out by the Crispr/Cas9 technology. I am trying to express that protein back using an expression plasmid. By doing this, I am supposed to ...
0
votes
0answers
22 views

How do cells grow (ie. gain mass)? [on hold]

I have some basic knowledge of the cell cycle. However, I don't understand how cells grow in the Gap phases. How do cells grow? And how does consumed food transfer mass to cells?
0
votes
1answer
29 views

Diabetes Mellitus and renal failure?

I have studied that Diabetes Mellitus leads to kidney failure and that this is because of the damage to the blood vessels (especially the blood vessels in the kidney) due to high levels of blood ...
-1
votes
0answers
33 views

Biological species concept [duplicate]

I could not understand a portion of an article I was reading. It was about biological species concept and it said ' There is difficulty in the application of biological species concept in those ...
1
vote
1answer
35 views

Is there nothing such as NADPH2? [duplicate]

I have gone through various sites and some say there is NADPH2 and some say there is no NADPH2 there's only NADP+ ...WHich is the correct view....Please dont mark this answer as duplicates since I ...
1
vote
0answers
13 views

Effect of increasing Extracellular Na+ Concentration on resting voltage and likelihood of an action potential of occuring

If you increase the extracellular Na+ concentration how will this effect the resting voltage and likelihood that an action potential of will occur? Please explain using the Goldman–Hodgkin–Katz ...
2
votes
0answers
35 views

Guide to learning about Population biology / ecology / dynamics for a non-Biologist

I'm an applied mathematician who works in the field of feedback control systems but has been becoming interested in looking at population biology (e.g. Lotka-Volterra, Mathusian growth,etc.) from a ...
1
vote
1answer
230 views

Where does female ejaculate actually originate from?

It's common knowledge that it's released via the urethra, but where does it originate? If it doesn't come from a part of the clitoris, then why is the clitoral glans called the clitoral glans? How ...
0
votes
1answer
17 views

Do antagonist-receptor complexes get absorbed into the cell?

My understanding is that normally, a neurotransmitter binds to a receptor and then that ligand-receptor complex gets absorbed into the cell and either degraded or recycled. So does the same thing ...
1
vote
1answer
33 views

Why is the left hand bigger than the right hand? [on hold]

I've noticed that the left hand is bigger than the right hand, more precisely - I don't know whether it is really bigger or just more flexible? I compared the hand span of the left hand and right ...
2
votes
1answer
49 views

Programs/software to graph biological data [on hold]

I am curious about what sort of programs people in my field of academia are using to graph their data. I am a master student in biochemistry, and have more or less only used excel (on rare occasions I ...
-2
votes
0answers
33 views

Why has DNA evolved into a double helix? [on hold]

What is the reason that DNA evolved into a double helix? Does it still evolve?
1
vote
2answers
55 views

What makes DNA sequences most different/recognizable from a biological perspective? [duplicate]

We can pretty easily quantify the amount difference between two different strings/sequences of characters. For example, if we take the words trebuchet and trebucket, we can say they have a Levenshtein ...
0
votes
0answers
23 views

How to search for all human diseases associated with a inversion on chromosome 22?

Is there any way to search for all diseases that associated with inversions on chr22? I found some online research databases like OMIM and disgenet but I don't know the correct nomenclature on how to ...
-5
votes
1answer
37 views

Is DNA of all animals made of the A,T,C,G blocks? [on hold]

Is it true that DNA of all animals is made of the A,T,C,G blocks?
-4
votes
2answers
29 views

Why can't proteins make copies of themselves? [on hold]

Why is it impossible for proteins to make copies of themselves?
1
vote
1answer
32 views

Once in the membrane, why don't proteins move?

I understand that based on their tertiary structure, intrinsic proteins have Hydrophobic [polar] R - Groups on their Surface and that they 'interact with the hydrophobic core of the cell membrane to ...
1
vote
0answers
12 views

Can plant roots absorb dissolved oxygen from water, or do they require actual bubbles in the water?

Plant roots generally require some exposure to air. Deep water culture is a form of hydroponics where plants' roots are left to soak in water. To keep the roots from "suffocating", most online ...
1
vote
1answer
20 views

T7 vs pBAD promoter strength

How do pBAD and T7 promoter strengths compare when pBAD is induced under conditions which would lead to its highest strength? Are there any papers that compare the two inducible promoter systems?
0
votes
0answers
17 views
0
votes
0answers
15 views

How does the body know to stop effector cell proliferation?

After a pathogen has been successfully neutralized, effector cells such as the plasma cells and the cytotoxic T cells which are specific for that pathogen decrease in numbers. What is the signal in ...
-1
votes
0answers
28 views

Genetics behind Preimplantation genetic diagnosis (PGD) [on hold]

Preimplantation genetic diagnosis (PGD) is a screening test used to determine if genetic or chromosomal disorders are present in embryos produced through in vitro fertilization ...
1
vote
1answer
19 views

How important is dead wood to the ecology of a forest and how much dead wood should remain?

I have a local 'forest management group' in my area. One of the jobs they do is to thin out the forest by removing some of the trees. They then sell the wood for firewood. I want to tell them to ...
5
votes
1answer
693 views

Could potatoes that have been fridged for 142 days still sprout afterwards?

I know that potatoes can still sprout even after being fridged, but could you fridge them for 142 days without them decomposing, and still be able to use them as seeds to grow more plants after that? ...
-3
votes
1answer
49 views

Why are considered to be exceptions to the cell theory? [on hold]

If I am not mistaken, the cell theory states that: All living organisms are made up of one or more cells Cells are the smallest units of life Cells arise from pre-existing cells Aseptate fungal ...
0
votes
0answers
14 views

DNA. mRNA, tRNA [on hold]

Can someone explain to me how transcription and translation works, especially the part about codes. And does amino acids has code or is it the tRNA?
-4
votes
0answers
38 views

What is PCR kinetics? [on hold]

What is PCR kinetics and the application of PCR kinetics? What are the types of graphs are required and how can we interpret the graphs?
0
votes
0answers
10 views

Is there any range for Aortic Valve Gradient?

I understand aortic valve gradient is pressure on the value (measured in mmHg). What I would like to know is if there has been any research that identified a minimum and maximum pressure value as the ...
1
vote
0answers
21 views

What's the exact meaning of and how to derive the coefficient of the path from sire to offspring?

According to Wright's Coefficients of Inbreeding and Relationship, the coefficient of the path from sire to offspring is given as $p_{o \cdot s}=\frac{1}{2}\frac{\sqrt{1+F_s}}{\sqrt{1+F_o}}$ But ...
0
votes
0answers
7 views

cellular chemical changes during mitosis [on hold]

How exactly, in terms of molecular behaviour/structure, do condensins, and cohesin s [in cell mitosis] achieve their functions within the cell?
-2
votes
0answers
30 views

Why did earlier humans not survive, yet apes are still among us? [duplicate]

Why did the earlier species of humans, such as the Ardipithecus and the Homo erectus, not survive, but the ape and chimp species, with whom we share 98% of our DNA, are still surviving and among us. ...
2
votes
0answers
53 views

How does the introduction of clones would affect population genetics? [on hold]

Since the ability to clone animals gives another way to preserve species, this could help for the breeding process. It has been noted that with the ability to clone animals, endangered species can ...

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