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It is a question of transmembrane potential. Ca++ being a cation, means that if you decrease the amount of ionized calcium in the extra cellular fluid, it conceptually is nearly equivalent to having a more positively charged intracellular fluid. This in turn means that the cell will be closer to its threshold potential for depolarization, therefore ...


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A ribosome is where amino acids are linked together by peptide bonds. True. A virus is NOT considered prokaryotic because it does not have a membrane. Some have capsules or envelopes, the latter of which are composed of the host cell's membrane. A virus would not be considered a prokaryote because it is not strictly alive -- prokaryotes do not ...


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Cytosol is the fluid portion of cytoplasm. All organelles are suspended in the cytosol but they do not form a part of cytosol. See here for a detailed explanation. As Chris Stronks mentioned all cells have cytosol, but the red blood cells specifically do not have any organelles. The cytoplasm of RBC has only cytosol in which hemoglobin is suspended. So ...


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I can answer your question from the comments. In the second case, we have that one set of parents carry the following probabilities: $AA=1/2$, $Aa = 1/2$, and $AA = 1$. The second set of parents are the following: $AA = 1$, $Aa=2/3$, and $AA = 1/3$. For the first set, we have the probability of $AA = \frac{1 + 1/2}{2} = \frac{3}{4}$. For the second set, we ...


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II:6 has a $2/3$ probability of being a carrier Aa. II:3 has a $1/2$ probability of being a carrier Aa. Assuming, just like canadianer suggested, that the recessive gene is rare, autosomal, and non-x-linked, this means II:5 and II:4 are both homozygous (AA). If parents of III:2 are therefore Aa and AA, this gives III:2 the probability of being a carrier ...


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1-6: OK; prokaryotes. Cytosol is the portion of cytoplasm which is devoid of any organelles, i.e., cytoplasm = cytosol + organelles. As prokaryotes don't have any organelles in their cytoplasm, they have only cytosol. So the answer would be prokaryotes (their cytoplasm consist of cytosol only). For a special case in eukaryotes see Crags answer below. ...


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Given that this is a text book question about classical genetics, you can safely disregard any reality about the disorder. I'd argue that the two alleles show incomplete dominance. The mild anemia, which is intermediate between healthy individuals and those with severe anemia, can be attributed to heterozygous individuals. In this case, the expression of ...


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This is a classic Brown-Sequard syndrome well- studied in the field of neurology. To answer your question, you would need to know what tracts are being severed and what sensations each tract is responsible for. A clean R hemi-section of the spinal cord at the level of T6 would affect the 1) R lateral corticospinal tract, 2) R spinothalamic tract, and 3) R ...



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