Unit 2: Parts Of A Cell Flashcards Preview

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Flashcards in Unit 2: Parts Of A Cell Deck (32)
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1

Function of Ribosomes

Carry out protein synthesis

2

Why would a human pancreas have a lot of ribosomes

Bc they have a lot of digestive enzymes

3

Difference between free and bound ribosomes

Free ribosomes are in the nucleus
Bound ribosomes are on the ER

4

Vesicles

Sacs of membrane that carry stuff throughout a cell

5

What does the Smooth ER do?

Synthesize lipids, detoxifies with special enzymes, stores calcium ions

6

Cell Theory

All living things are composed of cells and all cells come from other cells

7

4 things all cells have in common

-all membrane bound
-all have DNA
-all contain ribosomes
-all have cytoplasm

8

Where is DNA housed in prokaryotic cells

The Nucleoid

9

Structures found in animal cells but not plant cells

Lysosomes and centrioles

10

What is the cell wall made of?

Cellulose

11

What organelle performs photosynthesis?

Chloroplasts

12

What is the cell membrane composed of?

Phospholipids that form a two layer sheet called a bi-layer(head of molecule faces out, tails face in)
-also made of proteins

13

Difference between chromatin and chromosomes?

Chromatin makes up chromosomes

14

Nucleus in enclosed in_____ which is filled with _____

Nuclear envelope filled with pores

15

Nucleolus? What does it synthesize

A structure in the nucleus that synthesizes ribosomal RNA

16

Organelles included in the Endomembrane system?

Vesicles, ER, nuclear envelope, Golgi app. Lysosomes, vacuoles and cell membrane (everything but...)

17

Vesicles?

Sacs made of membrane

18

What does the smooth ER help to store?

Calcium ions

19

Describe four steps of synthesis and packaging of a secretory protein by the rough ER

1) polypeptide is threaded through rough ER cavity, folds into 3D shape
2) molecule is linked by sugar making it a glycoprotein
3) molecule is then packaged in a transport vesicle
4) the vesicle buds off membrane

20

Golgi app?

Modify proteins by adding things like sugar
Stacks are not connected to each other

21

Hypothesis of endosymbiosis

It states that mitochondria and chloroplasts were formerly small prokaryotes that began in living larger cells

22

How do neighboring cells adhere, interact, and communicate?

Cell junctions

23

Three types of cell junctions?

Gap junctions
Tight junctions
Desmosomes

24

Nonmemberous organelles

Cytoskeleton, micro villi, centrioles, cilia, ribosomes and proteasomes

25

Desmosomes

Ties cells together

26

Three parts of cytoskeleton

Micro tubules, micro filaments, intermediate filaments

27

Microtubules

-made of tubulin
-spiral
-resist compression
-move chromosomes in cell division

28

Micro filaments

-7 to 9 nanometers
-found in cilia and flagella
-made of actin wrapped around each other
-help cell move

29

Intermediate filaments

- provide track for movement
-anchor for cell to cell connection
-provide structure for cells

30

People involved with cell discovery in order of first to last

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