Key Concepts Flashcards
Define prokaryotic cells + eukaryotic cells
Prokaryotic are bacteria while eukaryotic are plant and animal cells
Function of cell membrane
Provides protection+transport nutrients into cells
Function of chloroplast
Provides energy(photosynthesis)
Function of ribosome
Making protients (protein synthesis)
Function of mitochondria
Where energy is realised in respiration+generate most of chemical energy
Adaptation of sperms cells (3)
1)tail to move towards egg
2)mitochondria(provide energy)
3)acrosome (tip of head wich release enzyme to digest egg memebrane
Adaption of egg cell
Nutrient in cytoplasm to grow early embryo
What type of cells are sperms and egg celss
Haploid cells (contain one set of chromosome)
Adaptation of ciliated epithelial cells(3)
Have cilia wich isbhair like structure to move substance one direction wich moves mucus up the throat where it can be swallowed by the throat
Mechanism of enzyme(2)
When an enzyme + its complementary substrate collide, an enzyme-susbstrate complex forma and reaction is accored
What is enzyme substrate complex
Temporary molecule formes when substrate bind to ezyme
What are enzyme?
Biological catalyst that speed chemical reactions without being used
How do enzyme de nature
If there exposed to extreme high pH or temperature the shape of active site changes
How doss substrate concentration effect enzymes?
Enzymes work the beat where there alot of substrates so the rate of enzyme activity increases
Breakdown of carbohydrate, protein and lipids (3)
1)carboydrates: glucose
2)protiens: amino acids
3)lipids: fatty acids+glycerol
Define active transport
Movement of molecules from a region of lower concentration to higher concentration (USING ENERGY REALSED DURING RESPIRATION)
Define osmosis
Diffusion of water molecules from high concentration to low concentration across a particual permeable membrane
Define diffusion
Net movement of particles from area of high concentration to low concentration
