CELLS I THE BUILDING BLOCKS OF LIFE I GCSE CELL BIOLOGY

HI EVERYONE
THE VIDEO BRIEFLY OUTLINES THE KEY POINTS TO REMEMBER ABOUT CELLS FOR GCSE REVISION.
HOPE THIS VIDEO HELPS YOUR LEARNING.

KEY POINTS/ SUMMARY
1. CELLS ARE THE SMALLEST UNIT OF LIFE.
2. OFTEN CLASSIFIED INTO TWO VAGUE GROUPS; EUKARYOTES AND PROKARYOTES, WHERE EUKARYOTES (ANIMAL AND PLANT CELLS) HAVE DNA ENCLOSED IN A NUCLEUS AND PROKARYOTES (BACTERIA) HAVE THEIR DNA FLOATING IN THE CYTOPLASM.
3. PLANT AND ANIMAL CELLS SHARE MANY ORGANELLES WITH FEW EXCEPTIONS.
COMMAN ORGNAELLES
-NUCLEUS
-MITOCHONDRIA
-CELL SURFACE MEMBRANE
-RIBOSOMOES
-ROUGH AND SMOOTH ER
-CYTOPLASM
-LYSOZOMES
-GOLGI APPARATUS

UNIQUE TO PLANTS
-CELL WALL
-VACUOLE
-CHLOROPLASTS

ORGANISATION IN THE BODY
CELLS -- TISSUE -- ORGAN -- ORGAN SYSTEM -- ORGANISM

SPECIALISATION OF CELLS
CELLS DIFFERENTIATE FROM STEM CELLS INTO VARIOUS SPECIALISED CELLS TO CARRY OUT THEIR FUNCTIONS.
FOR EXAMPLE RED BLOOD CELLS, ARE FLAT DISK SHAPED WITHOUT A NUCLEUS TO HAVE MORE ROOM TO CARRY OXYGEN AROUND THE BODY.

ALSO EXAM TIP- KNOW WHAT THE ORGANELLES OF ANIMAL AND PLANT CELL LOOK LIKE, OFTEN THERE ARE EXAM QUESTION THAT REQUIRE LABELLING THE ORGANELLES.