Answer:
The DNA mutation causes a change in the amino acid sequence for hemoglobin, which causes a change in the shape of red blood cells.
Explanation:
Sickle cell anemia is one of a group of disorders known as sickle cell disease. Sickle cell anemia is an inherited red blood cell disorder in which there aren't enough healthy red blood cells to carry oxygen throughout your body.
Normally, the flexible, round red blood cells move easily through blood vessels. In sickle cell anemia, the red blood are shaped like sickles or crescent moons. These rigid, sticky cells can get stuck in small blood vessels, which can slow or block blood flow and oxygen to parts of the body.
Sickle cell anemia is caused by a mutation in the gene that tells your body to make the iron-rich compound that makes blood red and enables red blood cells to carry oxygen from your lungs throughout your body (hemoglobin). In sickle cell anemia, the abnormal hemoglobin causes red blood cells to become rigid, sticky and misshapen.
The sickle cell mutation reflects a single change in the amino acid building blocks of the oxygen-transport protein, hemoglobin. This protein, which is the component that gives red cells their color, has two subunits. The alpha subunit is normal in people with sickle cell disease. The beta subunit has the amino acid valine at position 6 instead of the glutamic acid that is normally present. The alteration is the basis of all the problems that occur in people with sickle cell disease.
Answer:
The correct answer is - option A. They serve as second messengers to regulate glucose uptake to cells.
Explanation:
Type one diabetes is a condition that is characterized as the inability to produce enough quantity or at all of the insulin by the beta cells of the pancreas. Therefore, a patient with this condition completely depends on exogenous insulin to maintain the sugar level in the blood.
Insulin is the hormone that removes the excess amount of glucose from the blood by the adipose tissue, liver cells, and skeletal muscle that uptake an extra amount of sugar. there are receptors present on the surface of the plasma membrane which binds with the insulin and acts as a secondary to regulate a cascade reaction to glucose uptake to cells.
Some ways would be to use less gas-powered items, such as some stoves. Communities can encourage carpools and walking. If you were to drive, don't gun the gas and drive at moderate speeds.
In your own home you can conserve energy by turning off lights and electronic devices when not in use. You could also use energy efficient light-bulbs.
The most important thing for the survival of the rapidly growing population in the capital city is the food. The food is the very basic need of an individual. The other facilities needed by the population, such as recreational spots, better communication and transportation systems are all secondary to the food. The lack of food will lead to starvation and ultimately death.
Hence, the correct answer is option (b) - structures for growing food in or near cities.
Answer:
heterogeneous
Explanation:
it's a heterogeneous mixture called a colloid.
