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level: Level 1 of Cells

Questions and Answers List

level questions: Level 1 of Cells

QuestionAnswer
Difference between animal and plant cellplants cells have cell wall, starch grains and chloraplast and vacuole
Prokaryotic cells and eukaryotic cells differencespro= no membrane bound organelles -70s ribosomes - circular dna -plasmids -flagella
Function of the nucleusContains DNA which codes for proteins
Function of chloraplastCarries out photosynthesis to produce glucose
Mitochondria functioncarries out aerobic respiration which releases energy in the form of ATP
Function of the smooth endoplasmic reticulumsynthesises fats and transports fats around the cell
Rough endoplasmic reticulum FUNCTIONprotein synthesis and transports to golgi body
function of the golgi bodyto modify and package proteins producing vesicles and lysosomes
lysosomes aredigesting enzymes
Ribosomescarry out protein synthesis
Steps of centrifugation1. grind cell to break it 2. blend with a cold isotonic buffer solution 3. filter to remove cell debris 4. centrifuge spin 5.increases speed for next pellet
Roles of the cold isotonic buffer solutioncold- prevents enzyme action isotonic - prevents osmosis buffer - maintains ph so no denaturing
The levels of pellets in a centrifugeNucleus Chloroplast Mitochondria endoplasmic ribosomes
A light microscope-alive or dead organisms -2d -small cells thick or thin samples long wavelength of light so less resolution
Scanning electron microscope (ing-bouncING)electrons bounce dead thin samples 3d
Transmisson electron microscopeelectrons pass dead thin samples 2d
levels of size of measurementsmm -----> micrometres -----> nanometres x1000 ------------------------ x1000
equation for magnificationm= o/a