The components of cell nucleus are: Bblbepure oAMH OTBeT: a. Secretory vesicle b. Chromosomes c. Mitochondrial DNA d. Cell surface receptors

The correct answer is b. Chromosomes.<br /><br />The cell nucleus is the control center of the cell and contains the genetic material in the form of chromosomes. Chromosomes are thread-like structures made up of DNA and proteins that carry the genetic information necessary for the cell's growth, development, and reproduction.<br /><br />Option a, secretory vesicle, is not a component of the cell nucleus. Secretory vesicles are membrane-bound structures that transport and release substances outside the cell.<br /><br />Option c, mitochondrial DNA, is not a component of the cell nucleus. Mitochondrial DNA is found in the mitochondria, which are organelles within the cell that produce energy.<br /><br />Option d, cell surface receptors, are not components of the cell nucleus. Cell surface receptors are proteins embedded in the cell membrane that receive and transmit signals from the external environment.<br /><br />Therefore, the correct answer is b. Chromosomes.