Peroxisomes, Golgi, Lysosomes and Endo and Exocytosis Flashcards

1
Q

What is the function of peroxisomes?

A

To perform redox reactions that break down toxic peroxides.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Why do peroxisomes need compartmentalised?

A

As they generate reactive oxygen species

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What directs import proteins to peroxisomes?

A

A short signal sequence.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Where are the enzymes found in peroxisomes generated?

A

The ER and cytosol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the precursor vesicle (peroxisomes)?

A

The vesicle containing proteins that bud from the ER.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How are precursor vesicles converted to peroxisomes?

A

Through the uptake of lipids and cytosol.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Where do vesicles deliver cargo?

A

Between cell compartments, into the cell and out of the cell.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is exocytosis?

A

The process of releasing particles to the outside of the cell. The inside of the vesicle is topologically equivalent to the outside of the cell.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is endocytosis?

A

The process of particles being taken into the cell.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the three different coatings found on vesicles?

A

Clathrin, COP I and COP II

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the structure of the golgi?

A

A cis and trans face separated by the cisterna. The cis face receives the vesicle from the ER and the trans face produces a secretory vesicle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the lysosome?

A

The site of digestion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the pH of the lysosome?

A

pH 5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What process is used to acidify the lysosome?

A

A proton pump.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is present in lysosomes that degrades the vesicles?

A

Hydrolases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What kind of cells have vacuoles?

A

Plants and fungi

17
Q

What pathways deliver material to the lysosome?

A

Endocytosis, autophagy and phagocytosis

18
Q

What processes rely on exocytosis?

A

Cytokinesis, phagocytosis, plasma membrane repair and cellularistaion.

19
Q

When do coated vesicles shed their coating?

A

Before fusing with the target membrane.