Wednesday 2 August 2017

EUKARYOTIC CELLS INTERNAL STRUCTURE

Eukaryotic cells ;

1. Multicellular form - common, with extensive tissue formation.
2. Cell wall - Present in plant and fungi cells only
3. Plasma membrane - present
4. Nucleus - present
5. Nuclear membrane - present
6. Chromatin with histone - present
7. Genetic material - Linear double - stranded DNA : genes frequently interrupted by intron sequence, especially in higher Eukaryotes.
9. Nucleoli and mitotic apparatus - present
10. Plasmids - Rare
11. Cellular organelles ;
 Mitochondria - present
 Endoplasmic reticulum - present
 Vacuoles - present
 Lysosomes - present
 Chloroplasts - present(only in plants)
 Centrioles - present (Absent in higher plants)
 Ribosomes present (80S)
Microtubules - present
Flagella - Complex 9+2 structure of tubulin and other protein.
12. Respiration - All aerobic, but some facultative anaerobes by secondary modifications.
13. Metabolic patterns - All share cytochrome electron transport chains, Krebs cycle oxidation, Embden - Meyerhof glucose metabolism or glycolysis
14. Photosynthetic enzyme - Enzyme packaged in plastids bound by membrane
15. Sexual system - Both sexes involved in sexual participation and entire genomes transferred; alternation of haploid and diploid generation is also evident.

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Lipids

Lipids; It is saturated and unsaturated. Saturated; Milk, butter, coconut oil , phone oil. Unsaturated; Butter, margarine