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STRUCTURE OF A MYOFIBRIL -
(i) Primary Filaments (= Myosin Filaments). The primary filaments are thicker and confined to the A-bands only.
They are free at both the ends. They are composed of myosin (protein) and bear minute projections called cross- bridges of the protein meromyosin.
(ii) Secondary Filaments (= Actin Filaments). The secondary filaments are thinner and occur in I-bands, but extend for some distance into the A-bands between the primary filaments. This partial over lapping of the primary fila- ments by the secondary filaments gives dark appearance to the Abands. The secondary filaments are composed of the proteins actin, tropomysin and troponin. They are attached to the Z-lines by one end and are free at the other end. The secondary filaments are more numerous than the primary filaments. Six secondary filaments surround each primary filament. "
Gifted Species - Biological Nitrogen-Fixation Biological nitrogen fixation remains mainly confined to a few distinct nutritional types of prokaryotes, some of which are free-l
Define the Spray Drying Method? Spray drying is a unique drying process since it involves both particle formation and drying. It is most suitable for drying of liquid foods suc
What is HACCP? HACCP, as you may already know, is an acronym that stands for Hazard Analysis Critical Control Point, a systematic, science-based approach used in food
HIS T O R Y - Protoplasm was first seen by Corti, 1772 F . Dujardin called it "Sarcode" & observed it in animal cell Term "Protoplasm" was given by J.E. Pu
A newborn baby with a patent foramen ovale or a ventricular septal defect might be cyanotic (blue). Will a two-year-old with these defects also be cyanotic? Explain your answer.
BIOLOGY IN DISPELLING MYTHS AND MISBELIEFS - Varieties of myths still exist in our society, and can be removed by the knowledge of Biology. Some of these are- 1. Snake
Interactions between minerals Copper deficiency has been identified as a serious problem for grazing ruminants. A deficiency may be due to low concentrations of Cu in forage a
Q. How can triglycerides be decreased? Triglycerides could be decreased by: - limiting foods high in fats - decreasing sugar and sugar containing foods (carbonated bevera
Q. Which chemical elements are involved to form most of living biological matter? Ans The chemical elements that form most of the molecules of living beings are carbon (C)
describe the discovery of new fossil evidence for evolution
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