بالصراحة ما بعرف وأنا كمان ما اعرف
Answer:
Explanation:mitochondria
The enzymatic reactions of cellular respiration begin in the cytoplasm, but most of the reactions occur in the mitochondria. Cellular respiration occurs in the double-membrane organelle called the mitochondrion. The folds in the inner membrane are called cristae.
Answer:
Antigens
Explanation:
Antigens are the substances which are recognized and processed by many cells in the body and the presented to T cells which propagate immune response by activating B cells and macrophages