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Freeze Fracture Electron MicroscopyFreeze fracture electron microscopy i a technique lo reveal the surface features of hydrophobic interior of cell membrane. In this technique, the cells/tissues are first frozen in liquid freon at - 179°C. The frozen block is cut with a cold knife blade alongwith the planes of weakness, run through each cell. Generally, these planes occur between the two layers of lipid molecules of the membrane. The plane of fracture at these places exposes the interior of a plasma membrane (Figure shown below).
The newly exposed faces of a plasma membrane, the exoplasrnic fracture face (EF) and the protoplasmic fracture face (PF) are covered with a very thin layer of platinum by dissolving away the organic material. The freshly fractured membrane may be covered with platinum and carbon to dtain replicas (exact copies) of the surface and this is observed under a TEM. This technique demonstrates that intercellular junctions (where cells make contact with each other) are composed of specilaised membrane protein.
LOCOMOTION IN STAR FISH - With the help of tube feet aided by fluid pressure in them. In a tube feet upper ampulla, middle podium and lower sucker present.
What are zymogens? Zymogens, or proenzymes, are enzymes secreted in inactive form. Under some conditions a zymogen shifts to the active form of the enzyme. Zymogen secretions i
Explain about Skeletal muscle These are attached to the bones by tendons, which help in the movement of the part of the skeleton. These muscles are controlled by our conscious
Which of the below terms is also called "cancer of the blood" - an uncontrolled, greatly accelerated production of white cells. Is it: a) Leukemia b) Polycythemia c) sick
Q. What is Impaired Glucose Tolerance? Glucose tolerance is assessed by taking the fasting blood sugar value. An oral glucose load of 75 grams glucose is administered and blood
PHYSICAL LAYOUT In this section we shall focus on location floor plan, ventilation, lighting environmental temperature and humidity, acoustic characteristic, communication sy
What are some things that have algae in them? Yeast is considered Algae.
What is Cerebrum Cerebrum is divided into right and left parts known as cerebral hemisphere. It is the largest part of the brain. The functions of the cerebrum: It recei
genus of amoeba
Homology indicates similarity between the two different nucleotide or the amino acid sequences, generally with potential evolutionary importance. It is probably better to use more
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