The part of a cell that can be seen with an electron microscope,but never with a light microscope is/are the

Match the following and select the correct option:

List-$I$	List-$II$
$(1)$ Metacentric	$(a)$ Centromere at the terminal end
$(2)$ Sub-metacentric	$(b)$ Centromere close to the end
$(3)$ Acrocentric	$(c)$ Centromere slightly away from the middle
$(4)$ Telocentric	$(d)$ Centromere in the middle

Which of the following statements is/are correct?
$(a)$ The nuclear matrix or nucleoplasm contains the nucleolus and chromatin.
$(b)$ The outer nuclear membrane $(Ectokaryotheca)$ is usually continuous with the endoplasmic reticulum and also bears ribosomes on it.
$(c)$ Cells that are actively synthesizing protein have small and fewer nucleoli.

Which of the following organelles contains genetic material?

Which of the following is not contained in a eukaryotic nucleus?

Where is the satellite found?