Nucleus, Nucleolus, Nuclear Envelope & Centrioles Flashcards
What is the function of the nucleus?
The nucleus contains the chromosomes of an organism which is essential for cell division
What is the structure of the nuclear envelope?
The nuclear envelope is composed of 2 membranes separated by a fluid-filled space. Each membrane is made up of a phospholipid bilayer and proteins.
What is the function of the nuclear envelope?
The nuclear envelope allows exchange of substances between the nucleus and the cytoplasm via nuclear pores on nuclear envelope.
What is the structure of nucleoplasm?
Nucleoplasm is a semi-fluid matrix that fills the matrix
What is the function of the nucleoplasm?
The nucleoplasm serves as a medium for diffusion of metabolites and large macromolecules
What is the function of chromosomes/chromatin?
Chromosomes/chromatin contains genetic information which is involved in the transmission of hereditary information from one generation to the next
What is the structure of the Nucleolus?
The nucleolus is a non-membrane bound structure composed of proteins and nucleic acid
What is the function of the Nucleolus?
The nucleolus is the site of transcription of rRNA genes and assembly of ribosomes.
What is the function of centrioles?
Centrioles occur in pairs at each pole and their position is important in determining the polarity of cells; centrioles play a role in organising the synthesis of the spindle fires, which aid in the separation of sister chromatids during mitosis.
