Organelles Flashcards Preview

Biology AS > Organelles > Flashcards

Flashcards in Organelles Deck (20):
1

What is the function of the nucleus?

Chromatin is made out of DNA and proteins, the pores allow substances to move in between the nucleus and the cytoplasm. The nucleolus makes ribosomes.

2

What is the description of mitochondrion?

Oval shaped with a double membrane, inner membranes which fold to form cristae. Inside is the matrix there are enzymes for respiration.

3

What is the function of mitochondrion?

It is the site of aerobic respiration and produces ATP. It is found in large numbers in active cells.

4

What is the description of chloroplasts?

A small flattened structure in plant cells, it has a double membrane and membranes inside called thylakoids membranes which stack up to form grana linked by lamellae.

5

What is the function of chloroplasts?

It is where photosynthesis takes place, within the grana and stroma.

6

What is the description in RER?

System of membranes enclosing fluid filled space which is covered in ribosomes.

7

What is the function of RER?

It folds and processes proteins made at the ribosomes.

8

What is the description of SER?

System of membranes enclosing fluid filled space and has no ribosomes.

9

What is the function of the SER?

Synthesises and processes lipids.

10

What is the description of the Golgi Apparatus?

A group of fluid filled sacs and often there are vesicles on the edge.

11

What is the function of the Golgi Apparatus?

Process and packages new lipids and proteins and makes lysosomes.

12

What is the description of the lysosomes?

A round organelle surrounded by a single membrane and has no clear internal structure.

13

What is the function of the lysosomes?

It contains digestive enzymes and digests invading cells and breaks down worn out components of cells.

14

What is the description of the ribosomes?

A small organelle that either floats freely in the cytoplasm or is attached to the RER.

15

What is the function of the ribosomes?

They are where proteins are made.

16

What is the description of the cell wall?

It is a rigid structure around the plant cell, made from cellulose.

17

What it the function of the cell wall?

To support the plant cell.

18

What is the description of the vacuole?

A fluid filled sac with a single membrane, there is usually one large vacuole in plant cell. It contains salts, sugars, amino acids, wastes and pigments.

19

What is the function of the vacuole?

Supports herbaceous plants and part of woody plants by making them turgid, the sugars and amino acids act as a temporary food store. The pigments colour petals.

20

What is the description of the nucleus?

A large organelle with a nuclear envelope (double membrane) which contains chromatin and often a nucleolus.