Membrane bound organelles

Question 1

Golgi Apparatus

Answer 1

Sack of membrane bound flattened sacs. Secretory vessels bring materials to and from.
It modifies proteins and packages them into vesicles that are either stored in the cell of moved to plasma membrane.

Question 2

Nucleus

Answer 2

Surrounded by a double membrane called the nuclear envelope. Chromatin is the genetic material containing DNA. The nucleus separates its contents from the rest of the cell. Pores in the envelope allow larger substances to leave nucleus. Ribosome subunits made inside. Genes also stored inside.

Question 3

Rough Endoplasmic Reticulum

Answer 3

System of membranes which contains cisternae (fluid filled cavaties). They are coated in ribosomes. It is an intercellular transport system. Cisternae form channels to transport substances. Also provides large surface area for ribosomes.

Question 4

Smooth Endoplasmic Reticulum

Answer 4

System of membranes that contain cisternae (fluid filled cavaties). Surfaces are not coated in ribosomes. It contains enzymes that catalyse reactions involved with lipid metabolism. Involved with absorbtion, synthesis and transport of lipids.

Question 5

Mitochondrion

Answer 5

Can be spherical, rodshaped or branched. Inbetween 2-5um long. Surrounded by two membranes with fluid fillled space between. Inner membrane folded into cristae. Inner part is fluid filled matrix. Site of ATP (Adenosine 5′-triphosphate/ “energy molecule”) production during aerobic respiration. They are self replicating so more can be made if cell requires more energy. They are abundant in cells where metabolic activity occurs (chem reactions that change food into energy)