metabolism - Why are 6 turns of the Calvin cycle needed to make one . . . I‘ve read that 6 turns of the Calvin cycle are required to make 1 glucose molecule But, 3CO 2 and 3RuBP are used in one cycle and 6 triose phosphate is produced Only 5 triose phosphate molecules are required for RuBP regeneration The remaining 1 triose phosphate has 3 carbon atoms in it Only 3 more carbon atoms are needed, which can be produced again in the next cycle So, it would seem
Why are transcripts translated from 5 to 3 direction? What is the mechanism? In other words, how does the tRNA know whether the codon is in 5' to 3' direction? I also heard that anything that is translated from 3' to 5' direction is degraded Is it true?
How many base codes are in DNA? Two or four? - Biology Stack Exchange Please explain what you mean by “base code” It is not a term that means anything to me as a molecular biologist And then how such a thing (or apparently things are “in DNA” I have answered your question from what seems a fair interpretation of it But I really don’t know And what do you mean by “coded binary”? Does this have a meaning in informatics or have you invented it by
How old is this Kodiak bear? - Biology Stack Exchange Apologies if this is off-topic, I couldn't think of a more relevant SE site to post this Wikipedia has the following picture of a captive Kodiak bear in (presumably) a zoo in Germany How old is t
For how many generations does the average human have descendants? From what pop science tends to tell us, it seems that the distribution of descendants humans have is very uneven Mitochondrial Eve is the ancestor of all women in our present, Ghenghis khan probably
How do birds concentrate their urine? - Biology Stack Exchange I don't know, but perhaps a better question is, "How do birds conserve water?" Their excrement is paste-like because it is both urine and fecal matter, and if you've ever owned fowl, you'll know that their production of excrement is well, nearly prodigious
What does genetically tractable strain mean? - Biology Stack Exchange You've already basically got the idea of "genetically tractable": if we can readily modify an organism's genome using known techniques, then it's genetically tractable That's a moving target, of course, because the set of available techniques is constantly expanding, so this is more of a pragmatic definition than a taxonomic definition It's a notion that's quite important, however, because
What is the status of the telomeres in HeLa cells? What is unclear to me is why HeLa cells are that particular? My understanding is that the permanent based on (supposedly) the telomerase mechanism exists in all cancer cells, as well as in stem cells that are today cultivated So why are HeLa's cells that important? Because they were the first to be cultivated?
Do blood cells immediately die after leaving the body? Blood cells do not die immediately because they still have some amount of nutrients in them that they can use until it finishes They only die when they lose their source of nutrients after using up all that is in them Cells in blood still have access to nutrients due the presence of plasma which helps keep them alive for while Put in a fridge (4-18°C), the temperature slows their rate of