Science assessment 19/5/25 pt3 Flashcards
(24 cards)
Name the organelle that controls cell activities
Nucleus
Name the organelle that controls substances entering and leaving the cells
Cell membrane
Name the organelle that is the site of photosynthesis
Chloroplasts
Name the organelle That is the site of respiration
Mitochondria
Name the organelle That produces proteins
Ribosomes
Name the organelle That contains cell sap
Vacuole
Name the organelle That contains cellulose
Cell wall
Name the organelle That contains chlorophyll
Chloroplasts
Where in the cell does most chemical reactions take place
Cytoplasm
What type of cells are animal and plant cells
Eukaryotic
What type of cells are bacteria cells
Prokaryotic
What is present in eukaryotic cells but not prokaryotic cells
A nucleus
Name the circular piece of DNA found in bacteria cells
Plasmid
What is diffusion
Movement of particles from an area of high to low concentration
What is osmosis
the movement of water particles fron an area of high to low concentriation
What is active transport
Movement of particles from a area of low to high concentration which requires energy from respiration
State the three conditions that can affect the rate of diffusion
Concentration , temperature, surface area
Name one adaption that the alveoli have to increase the rate of diffusion
Thin cell membrane
What does active transport allow plants to absorb through their roots
Magnesium ions
Name the adaption of muscle cells
Ability to contract and relax
Describe the adaptation of a sperm cell
Tail for movement, acrosome enzymes for breaking down egg, a lot of mitochondria to transfer energy to tail
Name adaption of root hair cell
Large surface area
Write the equation to calculate magnification
Magnification = image size divide actual size
