All Questions

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0answers
4 views

Discuss the use of NMR Spectroscopy for polymorph detection in phamaceuticals

Need to write a 2000 word essay on this title, any help/sources would be greatly appreciated
0
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1answer
6 views

How can histidine be classified both as positively charged and hydrophobic?

I saw the chart in this post Histidine aromaticity. Since I'm not allowed to comment and post a question instead of an answer, I have to ask my question in a separate thread. How can histidine be ...
-1
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1answer
11 views

Cells “grown in LB broth to an OD600nm” [on hold]

Cells "grown in LB broth to an OD600nm" What does the OD stand for in this?
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1answer
10 views

Ways to measure effectiveness of a gene therapy trial?

I understand that Fluorescence in situ hybridisation can be used to measure the effectiveness of a gene therapy experiment/trial. But what are some other genetics techniques to measure the ...
0
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0answers
13 views

Which organism like to eat fat and oil? [on hold]

Fat and oil is high energy nutrient. But not so much organism utilize it as energy source. So I want to know what organism ;other than human, some carnivore that eat fatty meat; like to eat fat and ...
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1answer
32 views

Which (naturally selected) evolutionary process led to the development of egg-laying?

I understand that eggs were around before chickens, and therefore this age-old question isn't properly framed. But the idea still stands, there was a first egg-laying organism which modern chickens ...
0
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1answer
31 views

What impacts penetrance of Huntington's disease?

From Principles of Life by H. Craig Heller, David E. Sadava, Mary V. Price: From what I understand, Huntington's disease exhibits varying degrees of penetrance depending on how many times the ...
0
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1answer
18 views

Is this a valid definition of independent assortment?

"Allelic combinations separate randomly. I.e. a parent might be Aa and Bb for two traits but that doesn't necessarily mean the gametes will strictly be AB or ab but any of a number of combinations. ...
0
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1answer
39 views

What is the progressive evolutionary advantage that leads to flying?

As far as I understand, all life started as non-flying and flying came about by natural selection. What is the evolutionary advantageous "path" to flying? Or is there something else to explain this?
0
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1answer
32 views

What are non-heritable changes to genomes?

I am told that mutations are heritable changes to the genome. So this begs the question - what are non-heritable changes to genome?
2
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1answer
33 views

What is the difference between a phosphotransferase, a phosphatase, a phosphorylase and a kinase?

I've looked in several sources, but I'm still confused. This is what I have so far: A phosphotransferase catalyzes the addition of a phosphate group. A kinase is a type of phosphotransferase that ...
1
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0answers
10 views

Gene Therapy for Cystic Fibrosis Extension

Thank you everyone for answering my previous two questions on CF. I have decided to write a paper specifically on the use of viral vectors and gene therapy for cystic fibrosis. I was told by my ...
3
votes
1answer
20 views

Why is Cysteine and Tyrosine used to calculate a sequence isoelectric point?

Why are the amino acids - cysteine and tyrosine used in isoelectric point calculations for a protein sequence, yet neither of them are positively charged molecules? and are not used in net charge ...
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1answer
27 views

What are the structual differences between DNA and RNA? [on hold]

How is the structure of DNA different from that of RNA?
3
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0answers
32 views

Does eating antacid (such as Magnesia) 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
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0answers
15 views

Cropping with VMD [on hold]

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 ...
1
vote
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
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1answer
21 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?
14
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1answer
507 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
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1answer
26 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 ...
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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 ...
5
votes
1answer
83 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
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0answers
27 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 ...
5
votes
2answers
65 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 ...
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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 ...
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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 ...
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0answers
25 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.
1
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0answers
19 views

C. elegans and nutrition

If there is ample amount of food, do C. elegans worms know when to stop eating or do they store extra energy? Could they put this extra energy to use by moving faster or putting more eggs?
4
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2answers
133 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
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2answers
62 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
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1answer
46 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.
5
votes
1answer
55 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?
2
votes
1answer
70 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
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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 ...
2
votes
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?
5
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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?
3
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1answer
50 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
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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
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0answers
35 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
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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?
1
vote
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 ...
1
vote
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?
2
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0answers
28 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 ...
4
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1answer
47 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
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1answer
17 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
36 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
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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 ...
2
votes
1answer
27 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 ...

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