3) Voice of the genome Flashcards
what is the diff between animal and plant cells?
1)Animal cells have centrioles whereas plant cells do not
2)Plant cells have cellulose, large permanent vacuoles and chloroplasts while animal cells do not
3)
what is the difference between the cell surface membrane/plasma membrane and cell membrane?
cell surface membrane/plasma membrane is the outer membrane of a cell whereas cell membrane is what organelles are covered by
describe mitochondria
- site of aerobic respiration
- double membrane, inner membrane folded to form structures called cristae
-matrix of mitochondria contains enzymes needed for aerobic resp - mitochondrial DNA and ribosomes also found in the matrix
what is the diff between eukaryotic ribosomes and prokaryotic ribosomes?
Eukaryotic have 80S ribosomes whereas Prokaryotic have 70S ribosomes
what are the role of centrioles and describe them
- made of hollow fibres known as microtubules
-microtubules are filaments of protein used to move substances around inside a cell, as well as to support the shape of a cell from the inside
-two centrioles at right angles form centrosomes which organises the spindle fibres during cell division - NOT found in plant/fungi
what is the diff between proteins made by RER or free ribosomes?
proteins made by free ribosomes tend to stay within the cytoplasm whereas the proteins made by the rER are secreted
describe protein synthesis
1) pp synthesised in ribosome
2)pp move through rER and folded into tertiary structure
3)pp leaves rER in vesicle
4)vesicle fuses with golgi body + move from cis to trans face
5)pp modified as it moves through golgi body
6)in golgi, pp packaged into secretory vesicle
7)secretory vesicle transport to plasma membrane and fuses with it
8) by exocytosis protein leave the cell to carry out its function
what are the role of plasmids?
what are the role of slime capsules?
what are the role of pilli?
what are the role of mesosomes?
what cell structures are always present in prokaryotic cells?
