Practice Quiz 6 (protein processing)
You have 15 minutes to finish the quiz.
Q.1 :
Eukaryotic cells are larger than prokaryotic cells because
they are more efficient in the synthesis of plasma membrane components
they have internal membrane systems, which allow the compartmentalization of functions
they have more DNA
the size of both cell types is approximately the same
Q.2 :
Which of the following is found in both, eukaryotic and prokaryotic cells
a) nucleus, ribosomes
b) plasma membrane, ribosomes
c) nucleus, mitochondria
d) a) and b)
Q.3 :
Which characterizes best the function of the RER
an organelle for the storage of excess protein
serves as a location for lipid synthesis and modification
processes proteins which are not to be released into the cytoplasm
all af the above are functions of the RER
Q.4 :
An protein is synthesized on a free ribosome in the cytoplasm. The protein is most like destined to become
secreted
a lysosomal hydrolase
a protein camponent of hair
an enzyme that catalyses a metabolic reaction
Q.5 :
Which is not a function of the Golgi
modify carbohydrate chains of glycoproteins and package proteins into vesicles
to assist in the packaging of proteins destined for secretion
process lysosomal glycoproteins
all are functions of the Golgi
Q.6 :
Lysosomal diseases
can be caused by excessive accumulation of certain lipids
are sometimes hereditory
can be caused by inactive hydrolases
all af the above
Q.7 :
Which statement is correct?
vesicles containing proteins are passed from the RER to the Golgi
the RER membrane is studded with ribosomes
enzymes processed in the Golgi are packaged into vesicles for secretion
all of the above are correct
Q.8 :
Which statement is correct?
insulin is a hormone, released by constitutive secretion
insulin is released from pancreatic cells through regulated secretion
insulin is secreted by diffusion through the plasma membrane
insulin is a blood protein which removes glucose
none are correct
Q.9 :
Lysosomes
have an acidic lumen
contain hydrolytic enzymes
are cytoplasmic organelles
all of the above
Q.10 :
Exocytosis the fusion of
a vesicle with the plasma membrane to import macromolecules into the cell
a vesicle with the exterior side of the plasma membrane
a vesicle with the plasma membrane to export molecules to the cell exterior
none of the above