4446575
Cell Structure
- Magnification and Resolution
- The number of times greater that
an image is than the actual object
- The ablity to distinguish between two
objects that are very close together
- The number of times greater that
an image is than the actual object
- Smooth endoplasmic reticulum
- network of
membranes
- creates lipids and steriods
e.g. cholesterol, oeestrogen
etc
- network of
membranes
- Rough endoplasmic reticulum
- a network of membranes (sacs) extending from the outer
membrane of the nucleur
envelope
- has membrane bound ribosomes
on its surface
- created proteins move into the
cisternia where they may be modified
- Vesicles break from the ER to carry
proteins to the Golgi body
- a network of membranes (sacs) extending from the outer
membrane of the nucleur
envelope
- Golgi body
- stack of flattened membranes
- collects, sorts, processes and packages
substances to be taken to other parts of
the cells or secreted
- e.g. removal of methionine from
newly formed proteins to create
funtional proteins
- e.g. removal of methionine from
newly formed proteins to create
funtional proteins
- continuously being broken down
and formed
- stack of flattened membranes
- Mitochondria
- Lysosomes
- Ribosomes
- Centriolesand microtubules
- Choroplasts
- Cell wall
- Large permanent vacuole
and tonoplast
- Plasmodesmata
- Cell surface membrane
- 7nm thick
- partiallly pearmable
- trilamar appearance
- controls the movement of
substances into and out of
the cell
- 7nm thick
- Nucleus
- Nuclelous - creates ribosomes
- Nucleur envelope - double membrane
surrounding nucleus
- Nucleur pores - breaks in the nucleur envelope
that allow substances in and out the nucleus
- e.g. nucleotides and ATP into the
nucleus, mRNA and ribosomes out
of the nucleus
- e.g. nucleotides and ATP into the
nucleus, mRNA and ribosomes out
of the nucleus
- Chromatin - loosely coiled chromosomes which have
funtional units of DNA called genes that control the
activites of the cell
- Nuclelous - creates ribosomes
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