Set me straight

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    • #4219
      mikki
      Participant

      Ok, I am really confused which one is correct?

      glucose is oxidised to pyruvate regardeless if oxygen is present. If there is oxygen, it goes to the krebs cycle. If not the it is oxidised to lactate

      Or

      Oxygen has to be present for pyruvate to be oxidized. If there is no oxygen present then fermentation occurs. Lactic acid is a by-product of fermentation.

    • #44533
      kiekyon
      Participant

      i think both is correct

    • #44538
      mikki
      Participant

      😆 Uhm, okay, no.

    • #44578
      MrMistery
      Participant

      Actually only the first one is correct because pyruvate can be oxidised(to lactate, ethanol etc) even if there is no oxygen present.

    • #44589
      Poison
      Participant

      I think the both can be correct.
      Because it say in the first one "glucose" can be oxydized… And in the second one it says "pyruvate" can be oxydized….
      I may be thinking in my language. Correct me please.
      Actually, I think it is more like an english grammer question rather than bio.

    • #44605
      th1_rhs13
      Participant

      Agreed, Poison.

      The latter has validity as well; lactic acid, Co2, C2H6O can be derived from broken down pryuvate in anarobic respiration.

      PS: Ever get that gamete issue [ingestion] sorted out? Hahaha.

      quote MrMistery:

      Actually only the first one is correct because pyruvate can be oxidised(to lactate, ethanol etc) even if there is no oxygen present.
    • #44666
      MrMistery
      Participant

      NO!!!
      Look at the first part of a second sentence

      quote :

      Oxygen has to be present for pyruvate to be oxidized.

      What this is saying is that in the absence of O2 oxidation of pyruvate can not take place. That is false, for the already mentioned reasons(fermentation).

      Regards,
      Andrew

    • #44671
      th1_rhs13
      Participant

      I’m familiar with aerobic and anrobic respiration, but the the other two sentences in ‘option b’ are true too.

      You need to calm down with those exclamation marks, dude.

    • #44675
      MrMistery
      Participant

      Agreed, the others are true. But if an afirmation has 1000 sentences out of which only 999 are true is false, unless they have the "or" sign between them, which is not the case.

      Regards,
      Andrew

    • #44685
      Poison
      Participant

      "Oxygen has to be present for pyruvate to be oxidized. "
      The problem is that we (at least I am) are thinking in our languages. What I understood from that sentence is: Oxygen is needed for pyruvate to carry on the reaction. I mean what you say should be the "glucose oxydation". I may be wrong. I’m not a native speaker.

    • #44693
      th1_rhs13
      Participant

      Well if your tact is based on symantics re-read my post; never did I claim to side with one or the other. I placed emphasis on ‘option b’ having apt statements not claiming it to be an absolute.

      Edit: Cease PMing me about my age. Im here to articulate my limited, but growing, knowledge of Biology and seek the aid of others grasp of Biology. Nothing more.

    • #44762
      MrMistery
      Participant

      @Poison
      oxidation, in any languange, in the chemical language, doesn’t mean "reacting with oxygen" it means "giving some electrons"

    • #44773
      Poison
      Participant

      Yes I know. I didn’t mean that.

    • #45690
      mikki
      Participant

      Ok, I copied and pasted this to my lab instructor , " got a question. Is glucose oxidized to pyruvate regardless of oxygen being present or not? With the presence of oxygen, does it go to the Krebs Cycle and without it…………what? It is oxidized into a lactate or is that completely wrong?

      Her reply was, "Oxygen has to be present for pyruvate to be oxidized. If there is no oxygen present, fermentation occurs. Lactic acid is a by-product of fermentation. Does that help?"

      I’ll take her word on it since she is the one passing out the grades.

    • #45763
      kiekyon
      Participant

      the way i see this

      glucose (with or without oxygen)–>pyruvate

      pyruvate(with oxygen)–>Krebs cycle

      pyruvate(without oxygen)–>fermentation

      so, both question is correct

    • #46882
      tamtam
      Participant

      Video about a novel thought human pathogen at:

      http://www.silentsuperbug.com

    • #46893
      Poison
      Participant

      Tamtam, what is the connection between this topic and your human patogen? No double posting please.
      This will be deleted in 24h.

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