Organelles I: Nucleus

What is the function of the nucleus?

• houses and protects DNA

• makes new proteins

• synthesises messenger RNA (mRNA)

• duplicates genetic information for new cells

• it makes histones

The nuclear lamina sits inside the nuclear envelope. What is its function?

• maintains nuclear shape

• it anchors ribosomes

• it is an attachment site for chromatin

• anchors nuclear pores

• plays a role in DNA replication and cell division

Molecules are often produced in parts of the cell and transported to other regions for them to enact their functions. Which of these needs to be EXPORTED from the nucleus for them to function?

• ribosome subunits

• DNA

• mRNA

• lamin

Molecules enter and exit the nucleus through the

Molecules are often produced in parts of the cell and transported to other regions for them to enact their functions. Which of these needs to be IMPORTED from the nucleus for them to function?

• lamin

• mRNA

• histones

• transcription factors

Name a disease where lamin A no longer functions correctly

• malaria

• epidermolysis bullosa

• ehlers-danlos syndromes

• progeria