All Questions

0
votes
1answer
5 views

The the steructual differences between DNA and RNA

What are three structural differences between DNA and RNA.
1
vote
0answers
16 views

Does eating Natron before meal have any impact on digestion?

During an anatomy lecture I heard of the importance of the acidity of gastric acid (e.g., killing microorganisms, dissolving food, being a factor for triggering further processes). If a healthy person ...
0
votes
0answers
8 views

Cropping with VMD

I was wondering if it possible in VMD to render an image and set render commands that will produce a picture, where the white space around my figure is minimized. What I basically want is a rendered ...
0
votes
0answers
12 views

what is the role of ctab in plant dna extraction [duplicate]

i get good results for dna extraction by using ctab method but i doesn't have that proper information for role/function of ctab and other chemical. Anyone know, please briefly explain ......
0
votes
1answer
13 views

Could transfusion of a different blood type cure blood-based cancers?

Different antigen detection triggers an immune system response that could perhaps stimulate mitochondria and such in killing cancer cells - something like chemo without the hair-loss?
10
votes
1answer
243 views

Why is the Krebs cycle considered a part of aerobic metabolism if molecular oxygen is not involved in any of the reactions in the cycle

Why is the Krebs cycle considered a part of aerobic metabolism if molecular oxygen is not involved in any of the reactions in the cycle? I originally thought that Krebs cycle was aerobic metabolism ...
0
votes
1answer
22 views

Does too much Genetical Modification leads to formation of new species?

I think Genetical Modification can be termed as 'Artificial Mutation'. Is it possible that genes can be modified so much that it leads to the introduction of new Species i.e Can integration of large ...
1
vote
1answer
16 views

Do all drains lead to the ocean? How to explain using Hydrologic Cycle?

Is it true that all drains eventually lead to the ocean? And if so, how can this process be explained by the hydrological cycle? Furthermore, say if I was to flush something down the toilet that I ...
0
votes
0answers
25 views

Are Humans Evolving? [duplicate]

Due to migration & absence of reproductive isolation,has human evolution stopped? As evolution occurs when there is absence of mating between two population,growing trends of interracial ...
4
votes
1answer
76 views

What is the H+ gradient in mitochondria?

I would like to understand what the term H+ Gradient means. I googled this question and found terms such as chemiosmosis and ion gradient being tossed around. I am very new to biology and I do not ...
0
votes
0answers
23 views

Gene Therapy for Cystic Fibrosis

I have another question regarding cystic fibrosis. I understand that gene therapy is currently being talked about in the cure for cystic fibrosis. I know that Eric Alton at imperial college London is ...
4
votes
2answers
62 views

Functions of the CFTR gene?

I am a senior in high school and I am studying cystic fibrosis. I don't quite get the function of the CFTR gene as this is my first time dealing with this type of heavy scientific info. I had ...
0
votes
0answers
17 views

What accounts for diversity in species? [duplicate]

Why are there so many similar life units? (creatures, plants, etc.) Or, in other words, why is there great diversity among life units yet great similarity between similar groupings of life units? Why ...
0
votes
0answers
24 views

What circumstances allowed humanity to flourish (Where did ALL the humans come from?) [on hold]

Based upon some responses to What should three men and three women do if everyone else is dead it got me thinking, "Certainly something of the sort had to happen to humans, or, generally, any given ...
0
votes
0answers
24 views

i need help on a chart comparing mitosis and meiosis [on hold]

I inserted the chart I did the first two blanks but the rest really confuses me and this is due real soon I need help. I have to chose from the answer options.
0
votes
0answers
11 views

C.elegans and nutrition

If presented with an ample amount of food, do C.elegans organisms know when to stop eating or do they store extra energy? Could they also put this extra energy to use by moving faster or creating more ...
3
votes
2answers
128 views

The gender of offspring of Twins?

Given identical twin males, Michael and Douglas, Douglas and his wife have four children, all of whom are girls. Michael and his wife have only one child, a boy, and are expecting another. What are ...
2
votes
2answers
54 views

Why is Eadie- Hofstee Plot not linear

Besides the reason of cooperativity between multiple active sites on an enzyme, what are the other reasons for the Eadie-Hofstee plot to be non-linear
2
votes
1answer
45 views

Poisonous plants, animals, mushrooms: is this always a kind of defense?

I wonder whether developing deadly toxins in the organism's body is always or usually a defensive strategy rather than a by-product.
4
votes
1answer
54 views

Are fish and reptilian scales homologous?

Wikipedia: Fish scales are dermally derived, specifically in the mesoderm. This fact distinguishes them from reptile scales paleontologically. So aren't reptilia scales also dermally derived?
1
vote
1answer
69 views

For how long can a raven stay airborne (a week or more)?

I'm wondering for how long a raven can stay continuously airborne, if strained to do so? If it makes a difference, I'm mostly interested in the Common raven, Corvus corax. Are there for instance any ...
0
votes
1answer
21 views

Recovery from a more severe injury can be shorter than from a less severe one [on hold]

I vaguely remember reading somewhere that in certain cases, recovery from a more severe injury can occur faster than from a less severe injury. This was motivated by claiming that the less severe ...
1
vote
1answer
20 views

If hermaphrodite C. elegans can reproduce with females?

C. elegans can self fertilize, or they can mate with males. But are they able to mate with females? Or is there some kind of morphological barrier that prevents that?
4
votes
2answers
43 views

How exactly can dsRNA be introduced to a cell?

Is it just by viruses or are there other means by which it gets into cells, such as plasmid uptake?
2
votes
1answer
48 views

Hamming distance between two DNA strings

By definition from Wikipedia, the Hamming distance between two strings of equal length is the number of positions at which the corresponding symbols are different. In other words, it is the number of ...
0
votes
0answers
20 views

Is it possible to simulate the effects of high altitudes for plants?

Note- I considered asking this on gardening.stackexchange.com but i believe it is better suited for this site since it deals with more complicated material. As I understand it, certain plants ...
-2
votes
0answers
33 views

Eadie-Hofstee Plot [on hold]

If an eadie-hofstee plot shows two distinct gradient, Does this imply cooperativity between the two active sites? and how do we find the hill coefficient? The question asked us to plot graphs of V ...
-1
votes
0answers
30 views

Is autocatalysis a non-Michaelis-Menten Reaction [on hold]

If a reaction involves its own product altering the rate of reaction and the affinity to the substrate, does it still obey the Michaelis-Menten kinetic model?
0
votes
0answers
30 views

pedigree analysis calculation of the probabilty of 1 child having phenylketonuria out of 4 children [on hold]

In a family flows an autosomal recessive phenyketonuria trait.consider a couple with unknown genotype.Their grandparents are heterozygous carriers for sure and the parents of the couple have unknown ...
0
votes
1answer
31 views

How do the quantities of ATP formed during aerobic and anaerobic respiration compare? [on hold]

How do the quantities of ATP formed during aerobic and anaerobic respiration compare?
1
vote
0answers
26 views

Does sociality evolved before or after the ability of motility?

According to book Life Ascending: The Ten Great Inventions o Evolution. (Lane, N.;2010), Motility has indeed transformed life on earth in ways that are not immediately apparent, from the ...
3
votes
1answer
46 views

Redundancy of the genetic code

One particular codon codes only for one amino acid, but an amino acid can be coded for by several different codons. Now according to the genetic code, the codon UUU ...
0
votes
1answer
16 views

Explain the mode of inheritance and determine genotypes [on hold]

Please help me with the following question. I am really struggle with it. Every time you cross male and female flies with star eyes and dichaete wings, you observe a phenotypic ratio of 4 star, ...
1
vote
1answer
35 views

Identify the pink mold infecting refrigerated lemons

I made lemon juice 6 month ago. I just washed the lemon using brush and then cut them into pieces. Then I put one layer of lemon in the bottle followed by one layer of sugar Again one layer of lemon ...
0
votes
0answers
32 views

What is the color of white skin? [on hold]

I know you nominally call it "white" and the color is given by: refraction of light across the spectrum (white-ish, though leaning more towards red) melanin (brown) capillary vessels (pinkish) But ...
0
votes
1answer
29 views

Earliest and latest onset of Huntington's Disease(Chorea)?

Huntington's disease can hit at any age, although it tends to hit middleaged people most often. What is the youngest and oldest person that has exhibited Huntington's? Clarification: By oldest I mean ...
2
votes
1answer
42 views

What is happening physically when I get sleepy and when I wake up?

After a week of too little sleep, I slept about 12 hours last night to "catch up". It made me wonder: what is happening physically that signals that I'm done sleeping, or conversely, that I need to ...
1
vote
1answer
26 views

DNA methylation on the forward vs reverse strand?

I'm wondering if there are meant to be differences in DNA methylation between the forward and the reverse strand of the gene? I'm wondering because in primer design for bisulfite pyrosequencing one ...
0
votes
2answers
33 views

Why do physicians try to match HLA complexes for organ transplant?

My understanding of acute transplant rejection is that donor dendritic cells present donor antigens on MHC1 to host naive CD8+ T-cells resulting in an immune response against the graft. If you match ...
1
vote
1answer
31 views

Sequencing a specific region of a genome

First off, I'm new to bioinformatics and I am learning about DNA sequencing. Let's say that I knew that a specific region of a genome which contained information about a disease (whether it a person ...
1
vote
1answer
17 views

What are the reactions in the body that triggers dizziness after cigar(nicotine) smoking in non-smokers?

Suppose there is a person that has never used nicotine in any form in his/her life. Why does the person get dizzy after a few "shots" from a cigar(nicotine)? What's the difference between using other ...
4
votes
1answer
80 views

How fast can a human run?

I'm a runner (cross country) and I'm always amazed at how fast Olympic sprinters are. There's a lot of hype about those in the 100-meter dash being the fastest in the world, and we're constantly ...
0
votes
0answers
51 views

How can periodic asystole of heart cause cataplaxy with partial asystolic syncope? [on hold]

In brain, it can be called reflex asystolic syncope - symptom unconsciousness. In heart, there can be temperary asystole, still with consciousness. If these occur at the same time but with brain ...
-2
votes
1answer
88 views

Can Panic disorder induce Atrial Fibrillation and Temporary Cardiac Asystole?

This question is partly based on the article "Asystolic pauses in atrial fibrillation. Incidence, dependence on the underlying disease and significance for pacemaker therapy", where the exact ...
0
votes
1answer
20 views

What controls gut motility?

I have two different papers. One claims that gut motility is reduced by stimulation of the Opioid κ and δ receptors. The receptors are activated by Morphine and certain derivatives, specifically ...
0
votes
0answers
12 views

Gastroenteritis virus causing mutation of the Enterochromaffin cells

I am working on the solution to a worldwide problem: IBS or chronic diarrhea following a viral gastroenteritis infection. I think I have an answer. The only missing piece to the puzzle I found in a ...
0
votes
2answers
74 views

What is called the condition where no pacemaker cells are active in heart for short-time?

Assume that the heart is beating but no pacemaker cells is working for at least 15 seconds. This would be very long compensatory pause if extrasystole started it. There may be some low frequent ...
6
votes
2answers
47 views

How to find miRNA binding sites on a specific gene?

I am trying to find miRNAs that bind to the 3'UTR of a specific gene. What is the best way of doing that (that is, with a good scoring analysis that is most commonly used by researchers in this area)? ...
0
votes
1answer
14 views

Does re polarization of muscle fibers mean that the muscle bundle is relaxed?

If I flex my bicep and continue to contract it does it mean that the muscle cells are in depolarizing state and not re polarizing?
1
vote
1answer
33 views

Please help me to identify this red worm

I found bunch of red worms coming out of sink. It is rather unusual to find an overwhelmingly large number of worms. It doesn't seem like earthworm or horsehair worm. I don't know much about the ...

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