<span>It
is important that antibodies have a symmetrical quaternary structure to create
two identical binding sites for antigens. An antibody is a relatively large
protein having a Y-shape. Plasma cells produce antibodies which are then used
by the immune system to fight off pathogens (e.g. bacteria and virus). The antibody
is able to recognize the antigen of the pathogen. It binds with it either to
neutralize it directly or “tag” the microbe for future attack by other parts of
the immune system. </span>
This mechanism allows killer T-cells to hunt down and destroy cells that are infected with germs or that have become cancerous.
The other main type of T-cells are called helper T-cells.
Helper T-cells orchestrate an immune response and play important roles in all arms of immunity.
In a population of 10,000 individuals, 300 men are afflicted with a recessive, x-linked disease. 18 woman would be expected to be afflicted in this population
both sickle cell disease and cystic fibrosis. dominant X-linked disease. Gene variations on the X chromosome are the root cause of X-linked diseases. A variation in the one copy of the gene present in each cell is what causes the condition in males (who have only one X chromosome).
Red-green color blindness and hemophilia A: Red-green color blindness are two examples of X-linked diseases. Red-green color blindness is simply the inability to distinguish between the many hues of red and green.
Males who are hemizygous (i.e., have only one X chromosome) will fully express an X-linked disease. Females, who have two X chromosomes, on the other hand, will typically be carriers of the abnormality and are hence typically asymptomatic.
To learn more about the x-linked disease please visit
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The purines have two rings in their structure while the pyrimidines have hust one
I think the answer is a hurricane.
Hurricane is made of warm and cool air. Warm air has a higher temperature and less dense than cool air. It causes the warm air to move upward while the cool air moves downward. The warm air carries water vapour and it will condense after elevated, releasing the heat and makes the air cool.
If these events repeated continuously, there will be a constant movement of air.
