* a) Contains purine and pyrimidine which are bound together by covalent bonds
* b) There is always an equal concentration of purine and pyrimidine
* c) In RNA, thymine is replaced by uracil
* d) Introns is more common than exons on the DNA
* e) The histones mark the excision site
Answer a. F b. T c. T d. F e. F
In sickle cell disease, carrier has normal blood test.
In sickle cell disease, the abnormality involves the alpha chain of the globin molecule.
In sickle cell disease, there is absence of HbA.
In sickle cell disease, sickle cell crisis does not affect carrier of the disease.
Bowens disease causes increased risk of skin malignancy.
Solar keratosis causes increased risk of skin malignancy.
Aacanthosis nigricans causes increased risk of skin malignancy.
Squamous papilloma causes increased risk of skin malignancy.
Keratoacanthoma causes increased risk of skin malignancy.
Keratoacanthoma is also called molluscum sebaceum.
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