Top new questions this week:
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Researchers think they’re close to a cure for the common cold, but they first need to solve a complex problem that’s perplexed scientists for decades. Polio, smallpox, hepatitis A and B are all …
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If a given organism has a certain characteristic (a chemical that’s produced, a place an organ or organelle is in, a particular behavior), what’s the general procedure for correlating that …
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I understand that injecting pluripotent stem cells causes formation of teratomas. Does injecting unipotent stem cells also cause teratoma? If it does not form teratoma, is the injection of unipotent …
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I came across a question (Q-5b) that asks: Isocitrate Dehydrogenase in the [human] TCA cycle is associated with NAD+. Why does it make good metabolic sense that it should use NADP+? Explain and show …
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Chloroquinaldol is an over-the-counter antiseptic drug sold under many names, often in the form of lozenges for mouth infections. I absolutely hate its taste. The unpleasant sensation is unlike any …
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Greatest hits from previous weeks:
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During DNA replication, RNA primase puts an RNA primer in the lagging strand. What is the function of this RNA primer? Why can’t the enzymes put DNA fragments directly?
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I have learned (probably in high school?) that hairs turning white is caused by the part of the folicle which produces the pigment dying and being replaced by an air bubble. This sounds very …
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If I want to produce 100 seeds. Then the no. of meiotic divisions is 125 which can be calculated by the formula x + x / 4. x = no. of seeds produced. How is this formula derived?
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I was just sitting with my hand next to my nose and I realized that air was only coming out of the right nostril. Why is that? I would think I would use both, it seems much more efficient. Have I …
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When you get a shot for a vaccine (for example, the annual flu vaccine), the nurse frequently indicates that your arm will ache for a day or two, maybe more. This ache is typically not just a pain …
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Gene expression involves transcribing only one strand of DNA molecule. So i was wondering what are some biological advantages of the double stranded DNA?
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In practice, when you have vasoconstriction of the glomerular capillaries and subsequently an increase in blood pressure, glomerular filtration rate increases. However, this seems counterintuitive to …
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