Biology Gcse Paper 1

extremely simple and simplfied version

Types of eukaryotic cells

plant and animal

type of prokarytoic cell

bacteria

whats the tail in a bacteria cell called

flagella

what do ribosomes do

protein symphasis

what goes in and out of the cell

cell membrane

are prokaryotic cells unicelluar or multicelluar

unicellular

do prokarytoci cells have a cell wall

yes

where is DNA stored in a prokarytoic cell (give 2 exps)

circular single strand of DNA and plasmids

in a circular single strand of DNA they contain info they need to…(2)

survive and reproduce

what contains aerobic respiration

mitochondria

which is cheaper light microscopes or electron microscopes

light microscopes

which have a higher resolution microscopes or electron microscopes

electron microscopes

what do chloroplasts contain

chlorophyll

is binary fission the same as mitosis or meiosis

no

eukaryotic or prokaryotic binary fission

prokaryotic

eukaryotic or prokaryotic mitosis and meiosis

eukaryotic

when one bacteria cell divides into two

binary fission

where a bacteria cell can undergo binary fission it has to do 2 main things which are..

grown and replicate genetic material

when genetic material replicated (prokaryotic durning binary fission) the material will…

seperate

(binary fission) when ready to divide it produces a new…in the middle where they pull apart

cell wall

does binary fission take long?

no

a bacterial cell has a mean division time of 30 minutes.How many cells would it produce after 3hrs? and how many rounds of division

6 rounds and 64cells (1×2^6)

what does the mean division time depends on (2)

species and conditions

best conditions for bacteria growth (3)

moist,warm,plenty of nutrients

a new supply of cells is needed for (3)

growth,repair,development

how many pairs of chromosones do humans have

23

eukaryotic cells have a very large number or cells. have to be able to divide

cell cycle

DNA replicates to form copes of each chromosome,grows and copies its internal structure (mitochondria and ribosomes) what stage of the cell cycle is this

first stage

in the secound stage of the cell cycle what takes place

mitosis

one set of chromosones is being pulled to each end of the cell,nucleus divides what stage of cell cycle

2 stage

cytoplasm and cell membrane divide to make identical cells what stage of the cell cycle is this

final stage

mitosis is essential for _____ and ________of multicelluar organisms (plant/animal)

growth and development

when does mitosis take place

when an organism repairs itself (broken bone heals)

what does PMAT stand for

prophase metaphase anaphase telophase

the beginning stage of mitosis the nucelus is still there chromsones are condesing (thick and visible)

prophase

middle, chromosones line up in the middle of the cell nucleus dissambled so longer there

metaphase

awaay,chromosones move away opposites sides of the cell

anaphase

chromosones at complete opposites ends two nuclei form on opposite ends

telophase

final seperation into two cells by spliting the cytoplasm

cytokinesis