Nucleus Flashcards
Where is the nucleus found?
Only in eukaryotic cells
The nucleus is not present in prokaryotic cells.
How is the position of the nucleus in plant cells different from animal cells?
More to the side due to the large vacuole
In plant cells, the vacuole occupies a significant amount of space.
Which type of eukaryotic cells do not have a nucleus?
Some eukaryotic cells don’t have a nucleus such as the Red Blood Cells
These cells lose their nucleus during maturation.
What is the structure of the nucleus?
A double-membraned large organelle with three main parts:
* Nuclear envelope
* Nuclear pores
* Nucleoplasm
Each part has a distinct function related to the nucleus.
What is the function of the nuclear envelope?
It’s a lipid membrane that separates the nucleus from the cytoplasm
It is a lipid-membrane structure.
What role do nuclear pores play?
They are protein lined channels that tegulate molecules passing through
These are protein-lined channels.
What is nucleoplasm (nuclear sap)?
Liquid composed mainly of water that contains chromosomes and nucleoli
It is often referred to as nuclear sap.
What is the nucleolus responsible for?
Found inside the nucleus, the nucleolus is responsible for ribosome production
It synthesizes ribosomal RNA (rRNA).
What is transcription?
The process of DNA being transcribed into mRNA
This occurs in the nucleus.
What is translation?
The process of mRNA directing protein synthesis with the help of tRNA
This also involves ribosomes where proteins are assembled.
What does the nucleus control?
Cell growth and development because it contains the necessary genetic information
It contains the genetic information of the cell.
What process occurs in the nucleus related to DNA?
DNA replication and cell division
This is essential for cell reproduction.
What is the role of the nucleus?
Is the site of transcription and translation
