Cell structure Flashcards
What are Eukaryotic cells?
Cells that contain a nucleus and membrane bound organelle.
Describe the features of the nucleus?
The nuclear envelope has a double membrane containing pores for molecules to diffuse through.
The nucleus contains chromatin which is the site of ribosome.
Describes the features and function of the RER?
It’s a series of flattened sacs enclosed by a membrane with surface ribosomes.
It folds and processes proteins made by the ribosomes.
Describes the features and function of the SER?
It’s a system of membrane bounds sacs.
It produces and processes lipids.
Describes the features and function of the golgi body?
It’s a series of fluid filled, flattened sacs with vesicles surrounding the edges.
It processes and packages proteins and lipids and produces lysosomes.
Describe the features and the function of the mitochondria?
Mitochondria are double membrane bound. The inner membrane is folded to form cristae and the matrix is inside this.
It produces enzymes that produce energy through respiration.
Describe the features and function of centrioles?
There hollow cylinders containing a ring of microtubules.
There involved in cell division.
Describe the features and function of lysosomes?
There a vesicle bound by a single membrane.
They produce digestive enzymes.
What is the function of the cytoskeleton?
Plays a role in providing mechanical strength, aiding transport within cells and enabling movement.
State and describe the organelles in prokaryotic cells?
- cell wall made of petidoglycan
- capsule is a protective layer helping cells to retain moisture
- plasmid is a circular piece of DNA
- flagellum is a tail like structure that rotates to aid locomotion
- pili are hair like structures attaching to other bacteria cells
- ribosomes
