cell biology Flashcards
1
Q
what is a cell?
A
a cell is the smallest unit of life.
2
Q
what is a nucleus?
A
it contains genetic material in chromosomes
it controls how cells work and grow
3
Q
what is a cytoplasm
A
- supports cell structures
- site of many chemical reactions
- contains water and solutes
4
Q
what is a cell membrane?
A
- holds the cell together
- controls molecules entering and leaving the cell
5
Q
what is the cell wall?
A
-gives the cell extra support and defines its shape
6
Q
what is a chloroplasts?
A
- site of photosynthesis, provides food for plants
- chlorophyll pigments absorb light energy
7
Q
what is a vacuole?
A
- contains cell sap
- used for storage of certain materials
- supports the shape of the cell
8
Q
what is a mitochondria
A
- power house of the cells
- makes energy
- aerobic respiration
9
Q
what is ribosomes
A
-protein productions in protein synthesis
10
Q
what is vesicles?
A
- to safely transport substance from one part of the cell to another
11
Q
is a cellulose a strong material?
A
- yes it is
12
Q
explain vesicles:
A
- they are fluid filled sacks that are the tiny sacks
- vacuoles are bigger versions of the fluid filled sacks.
13
Q
what is a ‘mitochondria’?
A
- it is a powerhouse of cells.
- creates energy
14
Q
explain ‘ribosomes’:
A
- helps with making proteins.
which creates : ROUGH ENDOPLASMIC RECTICULIM (R.E.R)
and SMOOTH ENDOPLASMIC RECTICULUM (S.E.R)
15
Q
what does r.e.r and s.e.r mean?
A
- R.E.R means that it trains the system and moves around the cells. the S.E.R & R.E.R both are tunnel systems.
- the S.E.R doesn’t have ribosomes.
