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Explain the cell cycle in details?
Most cells of higher organisms follow a cyclic pattern of division. The bulk of the cycle consists of the stage known as interphase, the period of cell growth and development. Interphase begins with a period of cell growth, which is called G1. In G1 the newly divided cell roughly doubles in size and in number of organelles.
The S-phase following G1 is when the fully developed cell undergoes DNA synthesis, or replication of DNA to form two identical sets, each of which will go to one of the daughter cells. DNA is located within the nucleus in the form of chromatin, combined with proteins called histones.
The gap, or growth phase called G2, follows. Most of G2 is involved in synthesis of proteins and other structures necessary for mitosis, or in the separation of the duplicated DNA strands, and no DNA is synthesized in G2.
During mitosis, strands of chromatin condense to form chromosomes, and the cell divides. Each chromosome contains a single linear molecule of helical DNA. The actual division of the cytoplasm and the cell itself is called cytokinesis. A new G1 or growth phase follows, and the cycle is repeated.
How can amine groups be classified? Amines can be classify into primary amines, those to which one -R (variable radical) is attached to a -NH2, secondary amines, those where on
URINARY BLADDER - Pear shaped sac like. Situated in pelvic region of abdominal cavity. Ventrally placed. Lined by transitional epithelum. Detrusor muscle i.e. to expell out
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VI T AMINS Made up of protein or fat. Vitamins required in minute quantity for normal metabolism and body functions. Vitamins are supposed to be vital amines
Surface area The rate of oxidation increases in direct proportion to the surface area of the lipid exposed to air. Furthermore, as surface - volume ratio is increased; a given
Obturator - Ovule An obturator is an outgrowth of the placenta or funicle or integument or style near the micropyle. It is presumed to guide the pollen tube to the micropyle.
Q. What is meant by the arch reflex? In some situations the movement of the skeletal striated muscles does not depend upon commands of the superior motor neurons that it is not
Regarding the article "The DNA Transistor" which of the following is a false statement? A. The DNA transistor refers to the use of an electrical sensor to read one nucleotide a
Metals and Alloys in alloplastic implant materials Most of the dental implant systems are made of metals or their alloys. Currently commercially pure titanium and its alloy Ti-
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