Eukaryotic cells:Animals Flashcards
1
Q
Features of the nucleus
5
A
- Nuclear envelope
- Nuclear pores
- Nucleoplasm
- Chromosomes
- Nucleolus/ nucleoli
2
Q
What is nuclear envelope?
A
- Double- memrbane surrounding the nucleus.
3
Q
What are nuclear pores?
A
- Pores in nuclear envelope: allow large molecules out of nucleus (e.g., mRNA.)
4
Q
Function of nucleus.
2
A
1.) Site of replication (of DNA) and transcription (making mRNA.)
2.) Contains genetic material of cell.
5
Q
What is the nucleoplasm?
A
- Nucleoplasm: granular, jelly-like material.
6
Q
What are chromosomes?
A
- Protein-bound, linear DNA (linear = has two open ends.)
() - extra info for clarification.
7
Q
What is the nucleolus (nucleoli? )
A
- Small sphere within nucleoplasm.
- Site of ribosomal RNA production and makes ribosomes.
- One or more in a nucleus.
8
Q
Two different types of endoplasmic reticulums?
A
- Rough endoplasmic reticulum
- Smooth endoplasmic reticiulm.
9
Q
Structure of endoplasmic reticulum.
A
- Both have folded membranes called cisternae.
- Rough have ribosomes on cisternae.
10
Q
Function of rough ER.
A
- Responsible for protein synthesis
- Responsible for packaging protein into vesicles (that can transport protein out of the nucleus.)
11
Q
Function of smooth ER.
A
- Site of lipid and carbohydrate synthesis.
- Lipids and carbohydrates can also be stored here.
12
Q
Structure of golgi apparatus.
A
- Folded membranes (making cisternae.)
13
Q
What passes through the golgi apparatus?
A
- Proteins/ lipids from ER passed through golgi apparatus.
14
Q
Structure of golgi vesicles.
A
- Hollow structures that pinch off from cisternae.
15
Q
Function of golgi apparatus.
5
A
- Add carbohydrate to proteins to form glycoproteins.
- Produce secretory enzymes
- Secrete carbohydrates
- Transport, modify, store lipids
- Form lysosomes (powerful digestive enzymes are packages into golgi vesicles.)
() - extra info for clarification