biology - Topic 1

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how do u calculate the magnification of a light microscope?
magnification of the eye piece x objective lens
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what is a advantage of a electron microscope?
the wavelength of electrons is much smaller than the wavelength of light. so much greater detail and magnification can be seen.
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what does a plant cell have a animal cell doesnt?
cell wall and vacoule and chloroplasts
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name the features of a bacteria cell?
flagella, plasmid dna, cytoplasm, cell wall, chromosomal DNA
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name the 4 bases?
adenine (A) cytosine (C) Guanine (G) Thymine (T) ( A is only ever linked to T and C is only ever linked to G
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The bases are held together by weak hydrogen bonds
poo
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What is the human gemome project?
a genome is all the genetic material in an organism. The human genome project used sangers method to identify the sequence of the bases that appears on human chromozones.
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What is genetic engineering?
removing a gene from one organism and inserting it into another.Genes can be inserted into animal cells, plant cells and mircoorganisms.
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mitosis?
the division of a cell nucleus to produce two cell nuclei with genetically identical sets of chromosomes.
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meiosis?
a diploid cell divides twice to produce 4 haploid daugther cells
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compare where it happens in mitosis to meiosis?
mitosis - in most parts of the body - meiosis - in the ovaries and testes
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compare the number of cells made in mitosis to meiosis?
mitosis - 2 cells - meiosis - 4 cells
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compare the genetic varition in mitosis to meiosis?
mitosis- all cells are genetically identical - meiosis- all cells are genetically different
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compare the number of chromosomes in the nucleus?
mitosis- 2 sets of chromosomes (diploid) meiosis- one set of chromosomes (haploid)
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compare the purpose in mitosis and meiosis?
mitosis- growth and cells replacement meiosis- productio of gametes
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Card 2

Front

what is a advantage of a electron microscope?

Back

the wavelength of electrons is much smaller than the wavelength of light. so much greater detail and magnification can be seen.

Card 3

Front

what does a plant cell have a animal cell doesnt?

Back

Preview of the front of card 3

Card 4

Front

name the features of a bacteria cell?

Back

Preview of the front of card 4

Card 5

Front

name the 4 bases?

Back

Preview of the front of card 5
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