biology knowledge questions Flashcards
Name the organelle that controls cell activities
nucleus
name the organelle that controlls substances entering and leaving the cell
cell membrane
name the organelle that is the site of photosynthesis
chloroplasts
name the organelle that’s 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 do most chemical reactions take place
cytoplasm
what type of cells are animal and plant cells
eukaryotic
what types of cells are bacterial cells
prokaryotic
what is present in a eukaryotic cell but not a prokaryotic cell?
a nucelus
name the circular piece of DNA found in bacterial cells
plasmid
what is diffusion
movement of particles from a high to low concentration
what is osmosis
diffusion of water molecules from a dilute solution to a concentrated solution through a partially permeable membrane
what is active transport
movement of particles from an area of low concentration to an area of high concentration, which requires energy from respiration
state the 3 conditions that can affect the rate of diffusion
concentration, temperature, surface area
name one adaptation that alveoli have to increase rate of diffusion
thin cell membrane
large surface area
efficent blood supply
what does active transport allow plants to absorb through their roots
minerals
name the adaptation of muscle cells
ability to contract and relax
describe an adaptation of a sperm cell
tail for movement
lots of mitochondria to transfer energy to tail
name an adaptation of a root hair cell
large surface area
write the equation to calculate magnification
image size over actual size
name one advantage an electron microscope has over a light microscope
higher magnification
