Cell structure Flashcards
what 2 things can organisms be
- prokaryotes
- eukaryotes
Examples of eukaryotes
examples of eukaryotes are plant and animal cells
Cell membrane
the cell membrane holds cell together controls what goes in and out
mitochondria
mitochondria are for aerobic respiration
cytoplasm
the cytoplasm is where most chemical reactions -contains enzymes
Ribosomes
ribosomes are where Proteins are made
Nucleus
the nucleus contains DNA controls activities
Cell wall
the cell wall is made of cellulose, supports and strengthens
Vacuole
the vacuole is Cell sap, solution of sugar and salts
Chloroplasts
chloroplasts are where photosynthesis occurs , contains chlorophyll
Example of prokaryote
an example of a prokaryote is Bacteria
Describe bacteria
Bacteria have…
- no nucleus
- one singular strand of DNA
- One or more rings on DNA
- no chloroplasts or mitochondria
why do cells differentiate
cells differentiate to become specialised
what are undifferentiated cells called
undifferentiated cells are called stem cells
How is a sperm cell specialised
Sperm cells are specialised as they have…
- long tail and streamlined head-swim
- mitochondria-energy
- enzymes go through egg
How are nerve cells special
Nerve cells are specialised because they have…
-long and branched-connect to other nerve cells and form a network
How are muscle cells special
Muscle cells are specialised cuz they have…
- Long-space to contract
- Mitochondria-energy to contract quickly
How are root hair cells special
root hair cells special cuz they have
- long hairs to stick out to soil
- Gives plant big SA to absorb mineral ions
How are phloem and xylem spacial
-xylem is hollow and Phloem only has a few sub cellular structures- minerals can flow through
How to work out magnification
magnification=image size/actual size
