Astrolamb
  • Member for 4 years, 6 months
  • Last seen more than a week ago
  • Indiana
Can anyone identify this spider for me, please?
0 votes

I'm also from Northern Indiana. There's only two spider species in the area that are venomous: the Brown Recluse and the Black Widow. It's hard to tell from the picture, but I'm fairly certain that ...

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Can untargeted metabolomics detect epigenomic changes such as methylation?
1 votes

This is a fascinating question, and I spent a fair amount of time looking into it. From what I've been able to find regarding the relationship between metabolics and epigenetics, it seems that ...

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Does a tubular sodium reabsorption cause a stimulation of β2-adrenergic receptors?
1 votes

You've got it backwards. "norepinephrine-induced tubular sodium reabsorption" is the whole process. The β2-adrenergic receptors respond to norepinephrine (this is the "norepinephrine-induced" bit). ...

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Double stranded RNA Single stranded DNA
Accepted answer
4 votes

The main differences between RNA (ribonucleic acid) and DNA (deoxyribonucleic acid) is that DNA contains a hydrogen atom where RNA has a hyroxyl (-OH) group and RNA's uracil is substituted for DNA's ...

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Will new proteins incorporating new amino acids trigger an immune response?
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2 votes

The body's mechanism for detecting foreign object has a built-in failsafe that minimizes the likelihood of misinterpreting a self-derived antigen as foreign. Immunologic tolerance (...

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Why is melanin black?
1 votes

Let's do a quick mind experiment. Imagine a ray of UV light hitting a white molecule in the skin. White generally reflects light, so that UV light would bounce off, and potentially could hit something ...

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Why is some scat in the form of little pellets?
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0 votes

According to this article: The material that cannot be broken down any further, such as indigestible fiber, passes directly into the large intestine. Here water is reabsorbed and the material is ...

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DNA replication and Protein synthesis
1 votes

DNA replication and protein synthesis are very very different processes. The key thing to remember about protein synthesis is that DNA is not directly used; RNA is. When DNA is replicated, it is for ...

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Pyruvate oxidation - where did the hydrogen come from?
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2 votes

The Wikepedia page has a really good diagram of the reactions involved. The Pyruvate Dehydrogenase Complex facilitates the removal of CO2, and the addition of two hydrogen atoms to the overall ...

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what are some examples of how evolution's limitations prevented species from climbing to the absolute highest peak on the fitness scale?
Accepted answer
1 votes

The "limitations" of evolution is somewhat subjective, I suppose, but a couple of the important ones include random mutations, lack of foresight, and environment. Evolution is a complex process by ...

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Lower affinity drugs longer time for pathways to rebound?
2 votes

This article is a good starting point for this question. It states: "The binding affinity, defined as the strength of these interactions, is translated into physico-chemical terms in the ...

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codon optimization / enzyme active site improvement
-1 votes

Kind of an old post, I'm surprised it doesn't have an answer yet. There's no reason why you couldn't modify the RNA or cDNA directly, you just have to splice the gene correctly to make the changes you ...

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What are the applications of predicting the structure of proteins?
2 votes

Just off the top of my head, protein structure is very important for determining how proteins interact, for example determining molecular pathways or viral capsid structures. Knowing the structure of ...

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Effect of light spectrum on photosynthesis
0 votes

The there are two main types of chlorophyll involved in photosynthesis, chlorophyll a and chlorophyll b. Each one is effective at absorbing energy in the form of light at a different frequency - one ...

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Would current-day human-initiated panspermia be effective?
1 votes

There are many organisms capable of surviving in extreme environments. While 65,000 years is a long time for any organism, it is possible for some, or even all, of a 100g sample to survive long enough ...

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Genetic modifications in humans to prevent disease
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0 votes

Regardless of the ethical and philosophical concerns involved, it is theoretically possible to modify a child's DNA to prevent various diseases, with a few caveats. First of all, many diseases have ...

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Isolating gene of interest from a large strand of DNA
3 votes

Assuming that you know exactly where in the full DNA strand the gene of interest is located, it is fairly easy to isolate the gene. There are several restriction enzymes you can use, it's just a ...

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Do PC-12 cells have to be stored in nitrogen?
1 votes

The temperature at which nitrogen evaporates is about −195°C. Given the considerable difference in temperature between the current freezer and nitrogen vapor, I'm inclined to say probably not. I ...

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