All Questions
Tagged with genetics biochemistry
53
questions
3
votes
1
answer
74
views
Post-Translational Modification in insulin production
When searching "How is insulin produced commercially" on Google, most results simply say something along the lines of "The insulin gene is inserted into a bacteria, which then express ...
- 439
1
vote
1
answer
48
views
About tomatoes pigments, why red tomatoes rather than yellow ones
How the first tomatoes (yellow) that arrived in Europe turned from yellow to red ?
I know the yellow pigment is xantophylle and the red one is lycopene, but my question is, was it an adaptation of the ...
- 151
7
votes
1
answer
785
views
Are there any completely, or 'true', Mendelian traits that do not display any polygeny at all?
Recently, I learned about polygenic traits and it got me wondering, are there any truly Mendelian traits where the trait displayed exists in a total binary?
I have looked at some questions on the ...
- 73
4
votes
1
answer
107
views
Who discovered DNase?
I was recently studying genetics in which DNase had a crucial role in proving DNA to be the genetic material and I tried to find who discovered DNase (like the discoverer of DNA) but in vain.
Who ...
- 53
-4
votes
2
answers
98
views
Could DNA replication fail in the far future? [closed]
Assuming that all environmental conditions on Earth remain the same in distant future, the tendency of nature to increase entropy would cause the chemistry and the mechanism of DNA replication to ...
- 41
1
vote
0
answers
44
views
What causes the overactivity of keratin production and expression in the cells of the nail bed/ nail matrix after some traumata?
What is the cellular mechanism of traumatic(sterile) onychodystrophy(hypertrophy)? I.e one hits his toenail and has it removed twice( once after the first trauma and then again 3 years after the first ...
- 147
0
votes
1
answer
301
views
What are the disadvantages of myelin
The myelination of axons has plenty of advantages. It increases signal speed in axons, and thereby reduces reaction times. This is, of course, very good for the survival of the animal in question.
...
- 153
-4
votes
2
answers
733
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Why isn't the human zygote considered a human life how is a living anatomically modern human defined biologically? [closed]
It has 46 chromosomes by default when healthy(Differences almost always are pathological) and has almost every biological functions, processes a Newborn or and Adult person has.
It even invades ...
- 147
2
votes
1
answer
126
views
How can two biological sequences be anything but homologous?
If we consider homology between two nucleotide sequences as a yes/no answer to whether they have shared a common ancestral sequence, then given that all life share common ancestry and sequences are ...
- 377
1
vote
0
answers
27
views
Young family members to learn genetics - Amino Labs? [closed]
I'm an engineer but want to learn about biology with a niece and nephew who are early teens. I saw Amino Labs (https://amino.bio/) and thought because I work a lot with my hands, doing hands on ...
- 11
-1
votes
1
answer
56
views
Neuroscience - A neuron with two types of synapses (electrical and chemical) at the same time
I learn that the nerves from the Peripheral Nervous System can carry signals from and to other organs of the body.
I'm wondering if A Single Nerve carries
1) Only chemical signals
2) Only physical ...
- 133
1
vote
1
answer
477
views
What promoter is required for expression of a human protein Y in bacteria?
This is the actual question. It's from an entrance test for a research institute:
A scientist wants to express human protein Y in bacteria. For effective expression of this protein he should use
(A) ...
- 71
3
votes
1
answer
593
views
Are longer and shorter DNA similarly charged?
A longer DNA molecule would have more phosphate groups, so it should have a greater negative charge, right? It was taught in my class that only terminal ends of DNA are charged and all the phosphates ...
- 1,679
0
votes
1
answer
3k
views
Why are prokaryotic promoter sequences written 5' to 3', when transcription proceeds from 3' to 5'?
It seems that the promoter regions are written from the 5' to 3' direction. My lecture notes, for example, give the -35 and -10 promoter regions sequences like so:
Wikipedia seems to agree, on their ...
- 377
1
vote
1
answer
53
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Are pheromones capable of activating changes to the Phenotype of a complex organism?
I know that pheromones are means of communication between the same species, but are they capable of changing the phenotype of an organism, may be influencing the expression of the genes of a said ...
