Eukaryotic Cell - Golgi apparatus and Lysosomes - Part 3

How many membranes does the Golgi apparatus have?

a single membrane

Where are they found?

plant and animal cells

What is one characteristic of the Golgi apparatus?

compact

Describe the Golgi apparatus.

• series of curved membranes, enclosing a series of stacks of flattened sacs (cisternae).

Functions of the Golgi apparatus?

• Packaging proteins into vesicles or secretion from the cells

• Modifying proteins

More functions of the Golgi apparatus?

• Producing glycoproteins/adding sugar chains

• Producing lysosomes

1. Where is the stack constantly formed?

2. What does this form?

1. at 1 end from vesicles, which bud off from the ER, and is broken down again at the other end

2. form Golgi Vesicles

What is the Golgi apparatus directly linked with?

Endoplasmic Reticulum (ER)

1. What’s the shape of the lysosomes?

2. How many membranes do lysosomes have?

3. Do lysosomes have an internal structure?

1. Spherical sacs

2. single membrane

3. no internal structure

1. What do lysosomes contain?

2. How much per lysosome?

1. digestive enzymes

2. 50 per lysosome

What is the size of lysosomes diameter?

1.0µm diameter

Where are lysosomes found?

in plant and animal cells

Function of lysosomes?

• Contain digestive enzymes/lysozyme

• Fuse with other vesicles in the cell containing substances that need to be digested

Another function for lysosome?

• Breakdown (digestion) of unwanted structures

such as old organelles or invading whole cell