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  1. metabolism - Why are 6 turns of the Calvin cycle needed to make one ...

    Oct 6, 2021 · 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 …

  2. terminology - Why do so many species from the Global Diversity ...

    Jan 5, 2026 · I'm comparing taxonomic databases to better understand species names. I've analyzed the list of species from the Catalogue of Life (COL), from Wikidata and from the Global Biodiversity …

  3. What exactly is a "gland"? - Biology Stack Exchange

    3 days ago · Can someone please explain a the core, intuitive meaning of what is meant by the term " gland"? I have been learning a lot about the endocrine and exocrine gland and mechanisms of how they

  4. How many base codes are in DNA? Two or four? - Biology Stack …

    Nov 4, 2023 · 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 …

  5. How old is this Kodiak bear? - Biology Stack Exchange

    Sep 3, 2025 · 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 …

  6. How do birds concentrate their urine? - Biology Stack Exchange

    Dec 7, 2023 · 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 …

  7. What does genetically tractable strain mean? - Biology Stack Exchange

    Feb 21, 2021 · 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 …

  8. What is the status of the telomeres in HeLa cells?

    Aug 29, 2022 · 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 …

  9. Do blood cells immediately die after leaving the body?

    Dec 20, 2018 · 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 …

  10. How do the brain and nerves create electrical pulses?

    Dec 15, 2011 · The information between the brain and peripheral nerves is sent via electrical pulses or signals, How then does a non-metallic human cell manage to conduct an electrical signal?