0
votes
0answers
2 views

Why do fingers/finger tips swell during winters?

Why do fingers/finger tips swell during winters (of temperature 5-15 degree celsius)? During winters mine and many others's fingers swell. is it due to blood circulation or what?
3
votes
0answers
11 views

is cyanocobalamin carcinogenic?

I see that cyanocobalamin is not naturally occurring, and is synthesized in vivo to methylcobalamin. As part of the synthetic pathway, cyanide is broken off. All opinions I can find are that this ...
1
vote
1answer
9 views

How is the “fine mapping of pelvic regulatory region” done in this paper?

Could anyone please explain to be in very basic terms how Fig 2, and the associated text(located above the figure) is done? The jargon is too much for me to understand and I really need a simplified, ...
0
votes
0answers
10 views

How do I construct a restriction map of pBR 322 digested using Pst1, EcoR1 and Hind 3. [on hold]

Gel electrophoresis resulted in the following band size: double digest with Pst1 and Ecor 1 750bp & 3613bp, PST 1 and Hind 3 3584bp and 779bp, Ecor1 and hind 3 29bp and 4334bp. Single digests ...
2
votes
0answers
17 views

Can intron become exon in alternative splicing?

From this image We can saw several exon that is actually intron in other gene. It's not a really different gene, it's an alternative splicing of a gene. My background is not biology so is it ...
-2
votes
0answers
17 views

Effects of Injecting Empty Syringe into Human Body

What will happen if we inject an empty (air-filled) syringe into our body and why?
2
votes
1answer
15 views

Human bone density and Brown Bear bone density?

It is stated on this website that the density of a Grizzly bear bone is ten times our own. And since I am not into biology at all, I am confused as I don't understand the meaning of bone density here. ...
0
votes
0answers
14 views

Sex Linked Recessive and Autosomal Recessive Problem

Can someone further explain how my teacher got the answers for part B and C? Thank you.
2
votes
0answers
16 views

Problem involving selfing (inbreeding it with itself) a plant to generate purebred lines

I am working on a past exam problem where the first bit is as follows A plant is repeatably selfed to generate inbred lines. Let $\mathbb{P}(He|He)$ denote the probability that a heterozygous ...
2
votes
1answer
60 views

Evolutionary distance between Canidae, Felidae, and Rodentia

Comparing the families Canidae and Felidae, which have the shorter evolutionary distance to the order Rodentia? Less sophisticatedly put, are cats or dogs more related to rodents?
2
votes
1answer
21 views

What does it mean: carrying the stably integrated gene

Reading this study http://www.nature.com/cr/journal/v23/n10/full/cr2013122a.html They writing Multiple exogenous and endogenous genes can be simultaneously activated by CRISPR-on We tested ...
3
votes
1answer
40 views

Resources of all known biochemical pathways?

I am looking for a encyclopedia or biochemical pathway atlas of all known or reported pathways. I am very much interested in network and systems biology. Also the references can be open databases, ...
1
vote
0answers
9 views

Energy transformations in chemiosmosis and ATP synthase

In terms of energy, how does chemiosmosis drive ATP synthase? How does electrical energy turn into mechanical energy and then into chemical energy? Would the movement of $H^+$ be considered passive ...
2
votes
1answer
13 views

Is it possible to express the cistrons from a polycistronic insertion fragment in a single plasmid?

I have a insertion fragment that I wish to express from pUC19 in Escherichia coli. The insertion fragment is a sub-section from a larger operon sequence and contains just the last two cistrons from ...
6
votes
4answers
277 views

How can we differentiate between respiration and breathing?

I am a student of 10th grade, and I eagerly want to learn biology. What is the difference between respiration and breathing?
5
votes
1answer
221 views

Can scientists name themselves in the scientific name when they discover a new taxon?

There are sometimes people names in taxonomy, like Myotis keenii was names after Mr. Keen who contributed to discover the species. So, if you discover a species and someone else is constructing the ...
3
votes
1answer
19 views

Why Doesn’t Hypercalcemia Cause Muscle Spasms?

If you have more calcium in the cell, wouldn’t more attach to troponin and initiate muscle contraction? Why does hypercalcemia cause muscle weakness instead of spasms?
0
votes
0answers
13 views

What are some commonalities between biology systems and semiconductor physics?

It seems that fundamentally both neural system and semiconductors are operating using similar principles on the same scale. Things such as drift and diffusion current plays major role in both systems. ...
0
votes
0answers
26 views

Has a new functional structure ever been observed arising spontaneously?

Have we ever observed a new functional biological structure arising spontaneously such as a new functional organ (sensory or otherwise. such as tracing some creature in the past few hundred years ...
-5
votes
0answers
15 views

Sister replacement with female mates? [on hold]

I have a bad relationship with my sister and I often grow obsessed toward selective females from time-to-time. Often I notice that these obsessions have no sexual desires; I do not feel a need to have ...
1
vote
1answer
19 views

Reliability of Sanger sequencing

Hailed as the "gold standard" of sequencing, I was wondering to what Sanger sequencing owes its incredible accuracy to. If possible, I would like a quantification of the accuracy (because I doubt it ...
1
vote
2answers
29 views

Stop codons and exons?

If we had a hypotheical gene called gene exampleGene and this gene had 5 exons, labeled A, B, C, D, and E in that order on the chromosome, could it be the case that the stop codon for this gene be on ...
1
vote
0answers
18 views

Neuroscience of mathematicians

I've tried to google this but everything that comes up are things like "mathematical neuroscience" rather than the other way around. Specifically, I'm interested in anything we currently know about ...
6
votes
1answer
224 views

What is this insect? Found in Peru

I took the pictures today in Cusco Peru. It is the third insect of its class in a month. I never see it before. I thought that it is a wasp, but I think it's really thin to be a wasp. It's about 4 or ...
4
votes
0answers
18 views

How did the introduction of artificial light changed the life cycle of a plant?

Plants in urbanized areas are constantly exposed to artificial light after sunset. In their natural habitat there is a more distinct day and night cycle. Since light is an important factor in a plant ...
3
votes
1answer
22 views

Is it in principle possible to revive an extinct species having no living relatives?

Is it, in principle, possible to revive an extinct species having no living close relatives but whose DNA and other tissues have been preserved? What about the case where there are no living ...
1
vote
1answer
28 views

Which protein complex is composed of the greatest number of different kinds of proteins, and how many types are involved?

Why are some protein complexes composed of many different types of proteins? How many different types are they composed of? In particular, which protein complex has the greater number of different ...
2
votes
1answer
29 views

Does suffocation pain involve nociceptors?

I never suffocated myself so not entirely sure, but when you suffocate, it's painful, right? But of course different kind of pain than being injured or sick. What I'm wondering is, if the "painful" ...
-3
votes
1answer
37 views

What is a new biotechnology issue? [on hold]

I'm looking for any new biotechnology issue related to Biochemistry, Metabolic processes, molecular Genetics, or other relevant fields. If anyone knows of an issue that has solid resources around I'd ...
2
votes
2answers
46 views

How accurate does the alignment of molecules in DNA have to be?

We have learned that the same information is saved in the DNA in the same place. So when DNA splits and then connects again (during reproduction); how does it maintain the integrity of the ...
2
votes
1answer
29 views

What is genodiversity good for?

I saw some documents which were trying to say that they can prove via sweat smell selected by women that humans are developed to find a partner with similar genes. At the first glance, I refused it as ...
-2
votes
0answers
14 views

Spring turnover in lake [on hold]

During spring, the water at the top is at 0 degrees, and that the bottom is at 4 degrees (with a small middle part in between with intermediate temperatures). In spring as water warms at the top, its ...
5
votes
1answer
200 views

Biological origin of shuddering during sleep

What is the biological origin of the following behavior: Sometimes, during the early, formative phase of sleep (when you have a gradually dimming consciousness of what all is happening around), you ...
1
vote
1answer
17 views

Are more molecules of ADP than inorganic phosphate returned to the light reaction in photosynthesis?

During the dark reaction, 9 molecules of ATP are consumed for every 3 carbon dioxide molecules, yet only 6 molecules of inorganic phosphate ultimately leave the cycle. Does that mean that there is a ...
1
vote
1answer
18 views

What is the connection between exercise and muscle growth

From a physiological perspective, all that is done during exercise is the expending of energy in the form of ATP to fuel muscle contraction and extension. When I looked up why muscle grow due to ...
1
vote
0answers
12 views

Why do flagella form a bundle only when they rotate counterclockwise during chemotaxis?

During Chemotaxis in bacteria with flagella, the flagellar rotation dictates how the cell moves. If the flagella rotate counterclockwise, then they form a bundle at one end of the cell (---O) and ...
-2
votes
1answer
26 views

Standard DNA extraction protocol [on hold]

Which DNA extraction protocol in plant and other biological complex is acceptable method for article?
0
votes
0answers
33 views

Protein Folding [on hold]

I am planning to do my Masters thesis in Biophysics in the topic of "Thermodynamics of Protein folding " It would be great help if anyone could suggest me the proper way to start with like which ...
0
votes
1answer
21 views

Does the term “upper extremity” include hands?

I see on http://en.wikipedia.org/wiki/Upper_limb that the term "upper extremity" seem to include hands. However, in many hospitals, there is a "Hand & Upper Extremity Service", which would tend to ...
4
votes
1answer
54 views

When is Water Produced During Photosynthesis?

The formula for photosynthesis is: $$6CO_2+12H_2O \rightarrow C_6H_{12}O_6+6O_2+6H_2O$$ I can count the carbons, the waters on the reactant side, the oxygens, and the glucose, but I cannot seem to ...
3
votes
1answer
30 views

Analyse a ECG graph

I have a project about extracting features from a homemade ECG. I need PQRST points from the heart beat. The ECG I'm using have 3 electrodes that attaches to the chest. The problem is I don't know ...
3
votes
1answer
28 views

How Does NADPH Reduce 1,3-BPG?

If NADPH returns to being NADP+, then that means one proton and two electrons have been incorporated into 1,3-BPG. If only one proton and one electron were attached to the carbon in 1,3-BPG (removing ...
2
votes
1answer
51 views

How long do the periods of systole and diastole last?

The background to this is i'm doing some work using ECGs for an animation of the heart and i'm having trouble defining the end points of these periods, particularly diastole. Currently, the only ...
0
votes
0answers
17 views

Why do fingers swell during winters? [on hold]

Why do fingers swell during winters (of temperature 5-15 degree celsius)? During winters mine and many others's fingers swell. is it due to blood circulation or what?
3
votes
0answers
28 views

What is this frog?

(Man, there's a lot of 'What is this X?' questions here...) I saw this while walking in Cyprus in early April. It was at about 100m altitude, in woodlands, sitting in the sun on a concrete step ...
3
votes
1answer
22 views

Quantitative Trait Locus process?

I do not seem to understand the concept of Quantitative Trait Loci(QTL's), can anyone explain it to me in detail? Reading the wikipedia article helped somewhat, but I do not understand it well. What ...
3
votes
1answer
38 views

How can we create a living dinosaur using DNA technology?

I'm wondering what would we need to do to create a living dinosaur using DNA technology? If it is not possible with current technology, will it ever be feasible? In the movie Jurassic Park, ...
3
votes
2answers
56 views

Are there human cells, apart from red blood cells and platelets, without a nucleus?

I know that blood platelets and erythrocytes do not have a nucleus. Are there more cells in the human body without a nucleus, such as pancreas, cartilage, or lung cells?
4
votes
2answers
102 views

I have a black tiny bug crawling all over the house

This bug is crawling all around the house it stays within the shadows and moves very very slow, i have never seen it jump or run, it just moves very slowly P.S. those bugs as u can see are smaller ...
-1
votes
0answers
19 views

Protein secondary structure prediction

I'm trying to predict the protein secondary and 3-D structure for the sequence [Q1NN20] and need some help getting the ball rolling. I'm getting confused with how and when to use Jpred, swiss-mod, ...

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