Nucleus Flashcards
The nucleus is the site of?
Transcription and ribosome synthesis
What size is the nucleus?
Relatively large
How is the nucleus separated from the cytoplasm?
By a double membrane called the nuclear envelope (which has many pores)
The nucleus is the central…
Control centre of the eukaryotic cell
What is the nucleus responsible for?
Managing the cell’s genetic material- the nucleus is the store of genetic material
What does the nucleus allow to travel in?
Enzymes and signalling molecules
What forms the boundary of the structure of the nuclear envelope?
The double membrane (envelope)
What does the nuclear envelope contain and what are they made of?
Large pores- made of proteins
What does the nuclear envelope do?
Controls the entry and exit of molecules- protecting DNA from damage
Allows RNA molecules to enter the cytoplasm
What are chromatins?
Linear strands of DNA coiled around histone proteins and folded into compact structures
What are chromatins?
The genetic material of the cell- contains the code for proteins and functional RNA’s
What type of structure are chromatins?
Stable structure for long-term storage of information
What is the nucleolus?
A dense spherical region of protein and nucleic acid
What happens in the nucleolus?
Synthesis of ribosomal RNA and assembly of ribosomes
Is the nucleolus surrounded by a membrane?
No
