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Q. What are the most important structures within the cell nucleus?
Within the cell nucleus the most important structures are the nucleolus, an optically dense region, spherical shaped, where there are concentrated ribosomal RNA (rRNA) associated to proteins (there may be more than one nucleolus in a nucleus) the chromatin, made of the DNA molecules dispersed in the nuclear matrix during the cell interphase the karyotecha, or nuclear membrane, the membrane that delimits the nucleus.
Q. What are the antigen-presenting cells of the immune system? The antigen-presenting cells of the immune system also known as APC cells are cells that do digestion and phagocy
what is allometry?
Agarose gel electrophoresis is the method to analyze the size of the DNA (or RNA) fragments. In the presence of an electric field, bigger fragments of DNA move through a gel slowe
All or None Response A very weak stimulus does not result in an action potential. The stimulus must have a certain strength to evoke an excitation. This is the threshold value
How does a DNA vaccine prevent future disease? A DNA vaccine having DNA from a pathogen but cannot cause disease. When the vaccine is injected into a patient, the DNA directs t
Q. What are the respective functions of the micronucleus and of the macronucleus in the paramecium? The macronucleus is properly the cell nucleus it has RNA and DNA and acts as
Fluoride Inhibitor Fluoride inhibits enolase enzyme involved in the conversion of 2-phosphoglerate to phosphoenol pyruvate.
A decrease in blood plasma levels of calcium will lead to A. an increase in the calcium ion excretion in the urine. B. an increase in the calcium ion absorption from the con
Q. What do you mean by neurotransmitters? - Nicotinic receptors (nicotine mimics the effects of Ach here). Found at NM-junction, ANS ganglions in general. Binding of Ach to
describe the factors which decide the broad area of scientific activity?
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