Flashcards
Topic 1 – Key concepts in biology (Paper 1 and paper 2) 1-2
Cards in this deck (26)
- 1Eukaryotic CellsCells are complex and includes all animal and plant cells.With Nucleus
Example:Animal and plant. - 2ProkaryoticAre small and simple.No Nucleus
Example Bacteria - 3NucleusContains DNA and controls cells activities.
- 4CytoplasmGel-like substance where most of chemical reaction happens.
- 5Cell MemberHold the cell together and controls what goes in and out.
- 6MitochondriaIs where aerobic respiration takes place.And it transfer energy to the cell.
- 7RibosomesIt makes protein for the cells.
- 8Only Plant:Cell WallMade of cellulose.It supports the cell and strengthen it.
- 9Only Plant: Large VacuoleContains cell sap, a weak solution of sugar and salt. Maintain internal pressure to support the cell.
- 10Only Plant:Chloroplastswhere photosynthesis occurs,which makes food for the plant,this containes green substance called chlorophyll.
- 11Bacterial cells: Chromosomal DNAControls the cell's activities and replications.
- 12Plasmid DNAsmall loops of extra DNA.
- 13FlagellumA long hair-like structure that rotates to make the bacterium.
- 14What are Bacteria?Bacteria are prokaryotic,which means it doesn't have nuclei of chromosomal DNA.
- 15Specialised Cellhave a job and are adapted to their function.
- 16Egg and Sperm Cell ReproductionIn sexual reproduction, the nucleus of the egg cell fusses with the nucleus of the sperm cell,to create a fertilised egg,which develops into embryo.
- 17ChromosomesBoth the nucleus of the egg cell and sperm cell contain half the number of chromosomes(23).So this is call haploid.And when the cells are fussed together they have 46 and they become diploid.
- 18Egg cells:Cell membraneThe cell membrane fusses with the sperm cell membrane it becomes hard after fertilisation.So it stops other sperm cell entering.
- 19Egg Cell:CytoplasmIs packed with nutrients to supply to egg cell for the growth and development of embryo.
- 20Egg Cell: Jelly CoatIt protects the egg cells .
- 21Sperm Cell: Acrosometip of the head contains a small vacuole call the acrosome, in the acrosomes it has enzymes.To break down the egg cells cells jelly coat.This allows the sperm cell to burrow inside.
- 22Sperm Cell:MitochondriaIt release energy the tail.So it could swim toward the egg cell .
- 23Example of Specialised cellRed Blood Cell
White Blood Cell
Nerve Cell
Micro villi
Sperm
Egg
Ciliated Epithelial Cell - 24Total Magnification Equation:Total magnification=eyepiece lens magnification X Objective lens magnification
- 25Real size magnification equationMagnification=image size/real size
- 26Hydrogen Peroxide Equation:
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- GCSE Science Biology Flashcards on Topic 1 – Key concepts in biology (Paper 1 and paper 2) 1-2, created by Soria Sediqi on 05/10/2017.
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- Soria Sediqi
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