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  • Users: bard
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  1. B

    Signalling help

    This seems similar to A. If it connects to the ends then we can liken this phenomenon to the telephone cord ends acting as the synapses. Is this correct?
  2. B

    Signalling help

    I just need someone to please check if my answers are correct. Cells communicate in ways that are analogous to human communication. Decide which of the following forms of human communication are analogous to autocrine, paracine, endocrine , and synaptic signaling. A) a telephone...
  3. B

    Bio Help Please

    INtermediate filaments function as tension-bearing elements to help maintain cell shape and rigidity, and serve to anchor in place several organelles, including the nucleus and desmosomes Ok if this is true then wouldn't a nerve cell in the spinal cord of a mouse need the filaments to...
  4. B

    Bio Help Please

    Which of the following types of cells would you expect to contain a high density of cytoplasmic intermediate filaments? A) Free living amoeba (the answer is no, but why? Is it because the amoeba has to move) B) Human skin epithelial cell C) smooth cell in the digestive tract of a...
  5. B

    Proteins synthesized in a cell

    So then all three instances would have to pass through the rough ER?
  6. B

    Proteins synthesized in a cell

    The ribosomes are what make it look rough I believe
  7. B

    Proteins synthesized in a cell

    Yes I know that it is the rough endoplasmic reticulum that is involved in protein synthesis
  8. B

    Proteins synthesized in a cell

    Actually, for C, it says secreted outisde the cell. Then I believe it would follow the same pathway, Cytoplasm-ER(synthesis of soluble proteins)-Golgi-(the packaging) and then from there sent to other parts of body. And for A, is it that it will stay in the cytoplasm where there are ribosomes...
  9. B

    Proteins synthesized in a cell

    I have been asked to describe the pathway the following types of proteins follow and where they are synthesized in the cell. (a) Soluble proteins meant to remain in cytoplasm- Here wouldn't this follow the pathway cytoplasm-ER-golgi-exocytosis\ (b) membrane proteins meant to remain...
  10. B

    Protein to Protein Interactions

    How do protein to protein interactions and/or protein-nucleic acid interactions underlie the cellular processes of Replication, transcription, and metabloism. Well i know that protein -protein reactions underlie all processes in the cell. For example i think in translation the ribosome is...
  11. B

    Monomer Help Please

    I was hoping for a further explanation of why they save energy by this process. Thank You
  12. B

    Monomer Help Please

    Hi, Why is it better for a cell to synthesize polymers such as proteins carbohydrates by linking together monomers than to synthesize them from scratch> I believe it is because it would take too much energy to link them together from scratch. Since they already have these monomers the...
  13. B

    Importance of conformational changes during catalysis

    Hi everyone, my teacher talked about the importance of conformational changes during catalysis. But I don't understand the importance of the changes. Can someone help me understand?
  14. B

    DNA binding proteins

    In general how do DNA-Binding proteins bind to DNA? Many DNA-binding proteins bind to specific sequences of DNA bases. How do the proteins accomplish this sequence recognition. My answer: In general, DNA binding proteins possesses certain structural motifs, such as helixes, which enable...
  15. B

    Antifreeze proteins help

    Anyone know the answer to this ridiculous problem Antarctic notothenioid fish avoid freezing in their perpetually icy environment because of an antifreeze protein that circulates in their blood. This evolutionary adaptation has allowed these fish to rise to dominance in the freezing southern...
  16. B

    Cholesterol and CIS Double Bonds

    anyone have an idea?
  17. B

    Cholesterol and CIS Double Bonds

    Ok someone tell me if I understand the concept correctly. Two factors determine the fluidity of the cell membrane 1) The CIS double bonds determine the fluidity of the membrane. The more cis double bonds you have, the more fluid the cell membrane will be. 2) cholesterol plays an...
  18. B

    Amino acids on their own vs in a polypeptide chain?

    Bio Help! what is the difference between amino acids on their own and amino acids that have been incorporated into a polypeptide chain? My answer is that amino acids on their on do nothing. However when they interact they create a protein which eventually takes on a particular function...
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