Questions tagged [biochemistry]

For questions regarding the chemistry of living organisms.

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1 answer
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What chemistry other than that on Earth could support life on an alien planet? [closed]

I like designing aliens, similar to how Biblaridion did it on his videos on YT where he establishes the world conditions and chemistry of the world and proceed to create an evolutionary tree from ...
2 votes
2 answers
252 views

What could make an animal have hallucinogenic blood?

The animal in question is not hallucinating, but instead the humans who drink the blood of the serpent experience an altered state of consciousness that’s used in shamanistic ritual. What chemicals ...
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1 answer
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How plausible is my alien world? Atmospheric Content

The theoretical world of Hēdran is the 2nd planet of a 7 planet system. It lies within its star' s (G1.4) habitable zone, but with a hot jupiter gas giant only ~1 AU away it experiences heavy ...
3 votes
1 answer
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Do sulfuric acid plants produce oxygen?

In Biochemistry of a sulfuric acid world, I assumed that autotrophs would strip hydrogen from H2SO4 (which is their biosolvent) to fix carbon, just like plants on Earth strip hydrogen from water (...
5 votes
5 answers
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What pressures would force most life to possess external stomachs, and how would they avoid losing moisture on an Arid planet?

The zoology of my setting takes place on a mostly dry planet - it's certainly got rainfall, seas, and wetlands in certain ecoregions, and life exists there mostly, but some things still live in more ...
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14 votes
12 answers
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Can a person be immune to all diseases and poisons

I have an OC, who was born with this one-of-a-kind condition. His immune system is abnormally strong, invincible really. He's incapable of getting sick, or dying of bacteria, viruses, venoms, poisons, ...
1 vote
2 answers
219 views

What carbon-based alternative biochemistries would work in high-temperature, high-pressure water?

For a while now, I've been wanting to design a world where the average temperature is very high (compared to Earth, but nowhere near as high as Venus) but the water does not boil because the ...
4 votes
3 answers
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Are there any glaring problems in my alternate biochemistry?

I have been putting together an alternate biochemistry, one that is suited for an environment with lots of fluorine. I have a "model" of sorts for how it works, and I would like to know if ...
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Fire heat organism [closed]

My organism produce cooled plasma for defense .It lives in planet with very exotic flora and fauna which have super powers . It preys big whales and trex like organism. My question is that how my ...
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6 votes
1 answer
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This organism can survive temperatures of 45°C. What's the next overheating-related threat?

This is a sequel to my previous question in this vein, in which I handwaved away some issues related to Bob overheating. As DWKraus pointed out when answering said previous question, cell membranes ...
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3 votes
2 answers
230 views

What organelles(parts of a cell) did early cells most likely have?

I am trying to make fluorine-breathing life, starting from the cells and building my way up. I first am going to make very early and primitive cells, and for this I need to know what organelles were ...
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9 answers
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Why is overpopulation not an issue on a floating island where people can live for a long time

In my setting there are large floating islands and much smaller floating islands that flow in random directions. Smaller ones sometimes contain mini ecosystems or ore veins that are extremely useful ...
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8 votes
3 answers
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Viable alternatives to lignin and cellulose for cell walls and wood?

I want to design alien plants in which wood and cell walls are not made of the lignin/cellulose mixture wood and plant cell walls on Earth are made from, but I don't actually know what materials would ...
2 votes
2 answers
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programing genetic memory (or; the hard way to get your kids to clean their room.)

Is genetic memory in higher life forms real? if so can, in theory, an organism be programed for a specific behavior or set of skills? Ie: if genetic memory is a mechanism that does exist, at what ...
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1 answer
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Photosynthesis with Microwave or Radio Wave

In short, please provide me with a scientifically plausible biochemical scheme for how an organism can harness the energy of long-wavelength electromagnetic radiation to produce food for itself. Thank ...
4 votes
2 answers
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Any fluorine alternatives to the phosphate chain of ATP?

From what I know, the energy in ATP comes from the phosphate chain, which can be cleaved for energy using water(more specifically the energy comes the from the formation of new molecules upon cleaving ...
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4 votes
2 answers
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Alternatives for Phospholipid bilayer

What kind of inorganic materials might be used instead of phospholipid bilayer? It should be able to function in ammonia-environment. I had an idea of using phosphotungsic acid's anions based on this ...
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1 vote
1 answer
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Explosive biology

My organism live in planet full of water . It has only small percent of land about 5% only. It is big as gorilla. It eats metal ores and gains sustenance from it. My organism developed an powerful ...
4 votes
1 answer
96 views

Super powerful dragon biology

The lower jaw is hollow, to support the breath weapon, but the upper also has a weapon pocket. Each gland secretes a chemical that reacts with the other - the upper secretes a magnesium-rich oil that ...
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7 votes
0 answers
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Altering the muscles of giant creatures to let them stand without collapsing by changing their proteins

One of the problems with scaling up creatures without increasing their proportions is that their muscles won't be strong enough to support their weight due to the square-cube law, which I'm sure you'...
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-1 votes
2 answers
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Organic metallic compound [closed]

My organism have a weight of 270 kilograms. It have height of 2.49 metres. My organism is reptile and it lived in animals with metallic shells . My organism has bite force enough to crush car in ...
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4 votes
1 answer
107 views

Superheating furnace stomach

My organism lives near volcano. It consumes large quantities of rock and digests specific minerals, expelling the remaining rock, super heated by his furnace like stomach, as lava. What mechanism ...
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1 answer
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Alien biochemistry [closed]

My creature was alien which home was destroyed . It got into another planet similar to earth . Its organs are not like humans. It sustains itself with by passively drawing in body heat and the ...
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2 votes
5 answers
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Scientifically plausible powers : part 1 [closed]

My creature was capable of creating plasmoid flames from thin air not requiring oxygen and combustible objects similar to this "The user can create, shape, and manipulate plasma fire or fiery ...
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4 votes
2 answers
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biochemistry of a silicon based sulfuric acid planet?

Im thinking about starting a speculative evolution project about this becauze i really like the idea of exotic biochemistry, ive looked at a few other posts and i have the gases that are breathed and ...
5 votes
2 answers
165 views

Black photosynthetic large active animals

Previous questions have addressed whether a large active animal could run off photosynthesis alone and the answer seems to be no and that it could only provide around 4% of the animals daily usage but ...
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5 votes
2 answers
142 views

Superactinide Incorporating Biochemistry

Alright so as it is known, trans-uranic elements are universally unstable. However, in this setting, I'm using forms of quark matter that can imitate the nucleus of transuranic elements at least mass ...
5 votes
4 answers
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Are “carbon-based lifeforms” limited to inhaling O2 and exhaling CO2?

If there happened to be extremely radical conditions causing extremely unique evolutionary results, could a carbon-based lifeform hypothetically “drop” oxygen and carbon-dioxide in favor of an ...
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4 votes
1 answer
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My creature's cells mix water and some of the stuff in pee to cool themselves. How does it get that stuff to its cells?

After reevaluating the creature that cools its blood with lye and sal ammoniac, I removed the middleman - the cooling chamber and use of blood as coolant - and replaced the potassium hydroxide/...
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3 votes
1 answer
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Are there any alternatives to DNA in a fluorine environment?

In this fluorine life that I have been trying to make, are there any possible alternatives to DNA that could exist in these cells? The Environment: What I have so far is that these cells would exist ...
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14 votes
1 answer
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Possible mechanisms for life near absolute 0

The overview: Would any form of complex life be possible near absolute 0? At least for my personal standards, the "life" merely has to be: a self-sustaining, self-replicating machine, with ...
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4 votes
1 answer
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Could hypothetical cells use Hydrofluorocarbons(HFCs) as their DNA?

Hydrofluorocarbons consist of long chains of carbon with hydrogen or fluorine attached to them. So you could have chains like: DNA uses patterns of nucleobases A C G T as a “language” to keep their ...
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10 votes
2 answers
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Synthetic animal with super skin: Looking for Biotic material that's Elastic, hard to cut and puncture with force

Hey first post here!! I have a species of Synth-animal that is designed to upset ecosystems, consume all crops and livestock, and depopulate cities. The animal is around the size of an American black-...
3 votes
1 answer
200 views

How do I shield my calcium bio-electromagnet's wiring?

I'm attempting to design a creature whose internal anatomy includes a powerful electromagnet so that it can do things like pulling guns out of people's hands at close range. Like many electromagnets, ...
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2 votes
2 answers
118 views

How can we make a dense atmosphere allowing floaters, that would be toxic for humans to breathe?

I think that balloon aliens are an interesting alien body plan. It is something practically never seen on earth and the only lifeforms I’m aware of that do anything similar are kelp that have tiny ...
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5 votes
1 answer
149 views

Acetylene and Methane biology questions

First time poster, please be gentle. Long story short, my own alien worldbuilding/speculative biology project involves the idea that cyanobacteria and other oxygen producers never evolved and other ...
0 votes
3 answers
78 views

How are macro-molecules made in cells? [closed]

In my quest to make fluorine based life, to main roadblock is my confusion on how macromolecules are made. Take phospholipids for example, it confuses me how cells can just stick a phosphate to a ...
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6 votes
3 answers
720 views

What are some alternatives to tannin in plant bark?

When creating the plant life on alien planets, photosynthetic pigments other than chlorophyll can be the predominant molecule to create foliage of colours other than green, as we see on earth but for ...
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3 votes
3 answers
407 views

How do we tell a biosphere has been tampered with? [closed]

How could one distinguish a naturally evolved biosphere from one which has been manipulated in a subtle manner? Think slight genetic tweaks, targeted extinction events and so on. The process might ...
5 votes
2 answers
109 views

Would Chlorosian photosynthesizers produce chlorine or oxygen?

Chloros is a world with a huge amount of sulfur. Because sulfates displace halogens in alkali metal salts, fluorine and chlorine in Chloros aren't all locked up in rocks; instead, the oceans are a ...
2 votes
3 answers
101 views

What should engineered organisms do with excess fluorine?

PFAS (PolyFluorinated Alkyl Substances) are popularly known as "forever chemicals", because they are extremely inert and, being entirely artificial, no natural organism eats them--so, they ...
2 votes
2 answers
165 views

Could hypothetical cells use liquid Carbon Tetrafluoride as an alternative solvent to water?

Setting aside how this might evolve or come to be, could a cell use liquid carbon tetrafluoride(CF4 becomes liquid below -130 Celcius) as a solvent instead of water? Assume that the cells work ...
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2 votes
4 answers
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How could hypothetical Fluoride-based cells synthesize methane?

For a thing, I am trying to make a detailed model for fluorine based life, starting with the cell. As an alternative to ATP energy, I have chosen the reaction CH4+(4)F2 ==> CF4+(4)HF, I just can't ...
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2 votes
2 answers
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My creature mixes lye and sal ammoniac to cool its blood. How cold can its blood get before it stops working as blood?

Background information: According to various sources, the human heart pumps 5 liters of blood/minute at rest and 15-20 liters of blood/minute during running or exercise, 6,000 to 7,500 liters of ...
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3 votes
2 answers
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Could stromatolite formation be significantly speeded up?

Stromatolites form at an incredibly slow rate of around 0.5mm a year but I was wondering if more favourable conditions could speed this up? These stromatolites will exist on an earth-like alien planet....
5 votes
2 answers
127 views

How could mollusks be manipulated to control their shell growth?

I wanted to create an alien species that mostly relies biomaterials and biotechnology and one method of growing hard materials could be controlling the growth of seashells. The alien mollusks will be ...
2 votes
2 answers
142 views

Would a carbon-based lifeform be able to emerge and live in Venus-like conditions?

I'm trying to make carbon-based alien lifeforms which live in a Venus-like world, where: The temperature is $\pu{650-750 K}$ and the pressure is $\pu{0.9-1.1 MPa}$ Sulfuric acid is abundant Because ...
2 votes
1 answer
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How does my symbiotic fungus silicify its own cell walls to armor its host's bones?

Fungi have cell walls which - unlike those of plants, which are made out of cellulose, xylan, and lignin - are instead made out of chitin, glucan, and mannans. A fungus I'm planning on writing about ...
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2 votes
2 answers
67 views

Secreting a fast forming, high compression strength material

I am thinking about an alien species that secretes its own biosuit and I am wondering if they can secrete a substance with enough compressive and tensile strength to create strong objects and ...
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6 votes
3 answers
243 views

Anatomically Correct Night Land Monsters

The Night Land features a far future landscape, where the sun has gone out, which is made treacherous by the presence of various non-human "forces" and "powers", and monstrous ...

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