Biology Questions and Answers
- Where in the cell can
ribosomes be found? What is
the main biological function of
ribosomes?
Ribosomcytoplasm, ades can be found free in thehered to the outer side of (^)
the nuclear mthe endoplasmicembrane or associated to reticulum membrane
defining the rough endoplasmic
reticulum. Ribosomes arwhere protein synthesis takes place.e the structures
- What is the difference
between smooth and rough
endoplasmic reticulum?
The endoplasmicmembranous structure reticulum iscontiguous to a delicate
the nuclear membrane and present in
the cytoplasm. It net of channels thrforms aoughout the cell andn extensive (^)
is classified into rough or smooth types.
The rough endoplasmic reticulum has a
great number of ribosomes attachethe external side of its membrane. d toThe
smooth endoplasmic reticulum does not
have ribosomes attachemembrane. d to its
The main functions oendoplasmic reticulum arf the roughe synth (^) esis
and storage of proteins made in the
ribosomes. Treticulum plays a rhe smooth eole in the lipidndoplasmic
synthesis and, in muscle cells, it is
important in tcontraction stimulus.he conduction of the
- A netlike membranous
complex of superposed flat
saccules with vesicles
detaching from the
extremities seen in electronic
microscopy. What is the
observed structure? What is
its biological function?
What is being observed is the Golgicomplex, or Golgi apparatus. This
cytoplasmicchemical processing organelle is associated withand modification of
proteins made by the cell and with
storage and branding of these proteinsfor posterior use or secretion. Vesicles
seen under the electronic microscope
contain materialready to be exported (secreted already processed,) by the (^)
cell. The vesiclesapparatus, travel across th detach from the Golgie cytoplasm
and fuse with the plasma membrane
then secreting exterior. their substances to the
- On which organelle of the
cell structure does
intracellular digestion
depend? What is the chemical
content of those organelles?
Intracellular digestion occurs by the
action odigestive enzymes (hydrolases) that arf lysosomes. Lysosomes have (^) e
made in the rough endoplasmic
reticulum anapparatus. Lysosomes ard stored in the Golgie hydrolase-
containing vesicles that detach from the
Golgi apparatus.
http://www.biology-questions-and-answers.com