Raj observed human RBC under the powerful microscope to see the chromosomes. to his suprise he saw chromosomes in some of them while others lack chromosomes. give reason
Answers
Answer:
No experimental result is reported giving evidence of the presence of DNA molecule... The reason that human mature red blood cells lack a nucleus appears to be so that the red blood cell has room for more hemoglobin and therefore can carry more oxygen per cell.
Also Raj saw an immature RBC cell. Which has a nucleus.
Hope it helps.
Mark me as BRAINLIEST. :-)
Explanation:
Types of samples used to test for AML
If the doctor thinks you might have leukemia, he or she will need to check samples of cells from your blood and bone marrow to be sure. Other tissue and cell samples might also be taken to help guide treatment.
Blood samples
Blood tests are generally the first tests done to look for leukemia. Blood is taken from a vein in the arm.
Bone marrow samples
Leukemia starts in the bone marrow, so checking the bone marrow for leukemia cells is a key part of testing for it. Bone marrow samples are obtained from 2 tests that are usually done at the same time:
Bone marrow aspiration
Bone marrow biopsy
The samples are usually taken from the back of the pelvic (hip) bone, but sometimes other bones are used instead. If only an aspiration is to be done, it may be taken from the sternum (breast bone).
For a bone marrow aspiration, you lie on a table (either on your side or on your belly). The doctor will clean the skin over the hip and then numb the area and the surface of the bone by injecting a local anesthetic. This may cause a brief stinging or burning sensation. A thin, hollow needle is then inserted into the bone, and a syringe is used to suck out a small amount of liquid bone marrow. Even with the anesthetic, most patients still have some brief pain when the marrow is removed.
A bone marrow biopsy is usually done just after the aspiration. A small piece of bone and marrow is removed with a slightly larger needle that is pushed down into the bone. This may also cause some brief pain. Once the biopsy is done, pressure will be applied to the site to help prevent bleeding.
These bone marrow tests are used to help diagnose leukemia, but they might also be repeated later to tell if the leukemia is responding to treatment.
Spinal fluid
The cerebrospinal fluid (CSF) surrounds the brain and spinal cord. AML can sometimes spread to the area around the brain and spinal cord. To check for this spread, doctors might remove a sample of CSF for testing (a procedure called a lumbar puncture or spinal tap). A lumbar puncture is not often used to test for AML, unless a person is having symptoms that could be caused by leukemia cells that have spread into the brain and spinal cord.
For this test, you might lie on your side or sit up. The doctor first numbs an area of skin on the lower part of the back over the spine. A small, hollow needle is then inserted between the bones of the spine into the area around the spinal cord to remove some of the fluid.
A lumbar puncture is also sometimes used to deliver chemotherapy drugs into the CSF to help prevent or treat the spread of leukemia to the spinal cord and brain...
.
......,......,