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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. "
Advantages and Disadvantage of using Turbidity Measurement? Advantages 1. It is an easy, rapid and sensitive technique. 2. Turbidity measurement can be done without destr
State the term in broad - Lunule. In sand dollars, notches or holes which pass through the body of the animal. Their function is not fully understood though may be involved in
ERRORS IN FERTILIZATION - 1. Polyspermy - When more than one sperms are fused in an ovum, this condition is called polyspermy. 2. Polygynae - During oogen
Q. Are the veins or the arteries constituted of more muscle tissue? How different are the walls of these two kinds of blood vessels? The arterial system has thicker muscle wall
Define factors affect the rate and total drying time? Four main factors affect the rate and total drying time, which include: a) The properties of the products (the moisture
Compared to platyhelminthes which physiological problem have the cylindrical body of nematodes brought? How was that problem solved? The cylindrical shape of nematodes made imp
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What is gluconeogenesis There is accumulation of lactate, which is released into the blood and taken up by the liver where it is converted to glucose by the process called
charaacteristics
Explain Coelomates? Recall that Acoelomates have solid bodies, and Pseudocoelomates have body cavities that form between the endoderm and the mesoderm. In contrast, the body ca
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