GCD Ch. 15 qb
T/F
The ER is the major site for new membrane synthesis in the cell. - answertrue
T/F
Proteins to be delivered to the ER lumen are synthesized on smooth ER. - answerfalse
T/F
Steroid hormones are synthesized on the smooth ER. - answertrue
T/F
The ER membrane is contiguous with the outer nuclear membrane. - answertrue
T/F
In a typical cell, the area of the endoplasmic reticulum membrane far exceeds the area
of plasma membrane. - answertrue
T/F
The nucleus is the only organelle that is surrounded by a double membrane. -
answerfalse
T/F
Other than the nucleus, most organelles are small and thus, in a typical cell, only about
10% of a cell's volume is occupied by membrane-enclosed organelles; the other 90% of
the cell volume is the cytosol. - answerfalse
T/F
The nucleus is the only organelle that contains DNA. - answerfalse
Name the membrane-enclosed compartments in an eucaryotic cell where
photosynthesis occurs - answerchloroplast
Name the membrane-enclosed compartments in an eucaryotic cell where transcription
occurs - answernucleus
, Name the membrane-enclosed compartments in an eucaryotic cell where oxidative
phosphorylation occurs - answermitochondrion
Name the membrane-enclosed compartments in an eucaryotic cell where modification
of secreted proteins occurs - answergolgi apparatus and RER
Name the membrane-enclosed compartments in an eucaryotic cell where steroid
hormone synthesis occurs - answerSER
Name the membrane-enclosed compartments in an eucaryotic cell where degradation
of worn-out organelles occur - answerlysosome
Name the membrane-enclosed compartments in an eucaryotic cell where new
membrane synthesis occurs - answerER
Name the membrane-enclosed compartments in an eucaryotic cell where breakdown of
lipids and toxic molecules occur - answerperoxisome
Which of the following organelles are not part of the endomembrane system?
(a) Golgi apparatus
(b) the nucleus
(c) mitochondria
(d) lysosomes - answer(c) mitochondria
You discover a fungus that contains a strange star-shaped organelle not found in any
other eucaryotic cell you have seen. On further investigation you find the following.
1.The organelle possesses a small genome in its interior.
2.The organelle is surrounded by two membranes.
3.Vesicles do not pinch off from the organelle membrane.
4.The interior of the organelle contains proteins similar to those of many bacteria.
5.The interior of the organelle contains ribosomes.
How might this organelle have arisen? - answerA genome, a double membrane,
ribosomes, and proteins similar to those found in bacteria are evidence for an
organelle's having evolved from an engulfed bacterium.
Plasma membrane proteins are inserted into the membrane in the
__________________. - answerER
The address information for protein sorting in an eucaryotic cell is contained in the
__________________ of the proteins. - answeramino acid sequence
Proteins enter the nucleus in their __________________ form. - answerfolded
T/F
The ER is the major site for new membrane synthesis in the cell. - answertrue
T/F
Proteins to be delivered to the ER lumen are synthesized on smooth ER. - answerfalse
T/F
Steroid hormones are synthesized on the smooth ER. - answertrue
T/F
The ER membrane is contiguous with the outer nuclear membrane. - answertrue
T/F
In a typical cell, the area of the endoplasmic reticulum membrane far exceeds the area
of plasma membrane. - answertrue
T/F
The nucleus is the only organelle that is surrounded by a double membrane. -
answerfalse
T/F
Other than the nucleus, most organelles are small and thus, in a typical cell, only about
10% of a cell's volume is occupied by membrane-enclosed organelles; the other 90% of
the cell volume is the cytosol. - answerfalse
T/F
The nucleus is the only organelle that contains DNA. - answerfalse
Name the membrane-enclosed compartments in an eucaryotic cell where
photosynthesis occurs - answerchloroplast
Name the membrane-enclosed compartments in an eucaryotic cell where transcription
occurs - answernucleus
, Name the membrane-enclosed compartments in an eucaryotic cell where oxidative
phosphorylation occurs - answermitochondrion
Name the membrane-enclosed compartments in an eucaryotic cell where modification
of secreted proteins occurs - answergolgi apparatus and RER
Name the membrane-enclosed compartments in an eucaryotic cell where steroid
hormone synthesis occurs - answerSER
Name the membrane-enclosed compartments in an eucaryotic cell where degradation
of worn-out organelles occur - answerlysosome
Name the membrane-enclosed compartments in an eucaryotic cell where new
membrane synthesis occurs - answerER
Name the membrane-enclosed compartments in an eucaryotic cell where breakdown of
lipids and toxic molecules occur - answerperoxisome
Which of the following organelles are not part of the endomembrane system?
(a) Golgi apparatus
(b) the nucleus
(c) mitochondria
(d) lysosomes - answer(c) mitochondria
You discover a fungus that contains a strange star-shaped organelle not found in any
other eucaryotic cell you have seen. On further investigation you find the following.
1.The organelle possesses a small genome in its interior.
2.The organelle is surrounded by two membranes.
3.Vesicles do not pinch off from the organelle membrane.
4.The interior of the organelle contains proteins similar to those of many bacteria.
5.The interior of the organelle contains ribosomes.
How might this organelle have arisen? - answerA genome, a double membrane,
ribosomes, and proteins similar to those found in bacteria are evidence for an
organelle's having evolved from an engulfed bacterium.
Plasma membrane proteins are inserted into the membrane in the
__________________. - answerER
The address information for protein sorting in an eucaryotic cell is contained in the
__________________ of the proteins. - answeramino acid sequence
Proteins enter the nucleus in their __________________ form. - answerfolded
