Download Cell Structure Practice: Nucleus

Practice Questions
Identify the organelle circled below.
Ribosome
Identify the organelle circled below.
Golgi apparatus
Identify the organelle circled below.
Nucleus
Identify the organelle circled below.
Rough ER
Explain WHY it is called rough ER.
Attached ribosomes
What is the ribosome doing?
By polymerizing amino acids
Making protein
How does the ribosome know how to polymerize the AA’s?
The nucleus sends instructions to the ribosome
How do instructions leave the nucleus?
Through the pores
Why is the circled protein not ready to be shipped out of the
cell? It’s unfinished
Where do unfinished proteins go after they are made by
ribosomes? To the rough ER
When we say that the rough ER “finishes” protein, what do
we mean? It folds the protein into the correct shape?
Explain why the folding process is especially important when
making enzymes. Wrong shape = won’t fit (lock and key)
Why is the circled protein not yet reading to be shipped out
of the cell? Not packaged
Where do finished proteins go after they are folded by the
rough ER? To the Golgi apparatus
When we say that the Golgi apparatus “packages” protein,
what does that mean? Wraps it in a vesicle
Which letter represents the vesicle in this diagram?
B
D
B
C
A
What does letter A represent?
The Golgi apparatus
D
B
C
A
What does letter D represent?
The cell membrane
D
B
C
A
What does letter C represent?
Proteins being shipped out of the cell
D
B
C
A
Explain why proteins must be packaged inside a vesicle.
The vesicle can fuse with the cell membrane.
D
B
C
A
Put the organelles in order:
A. Ribosomes 2
B. Nucleus 1
C. Golgi apparatus 4
D. Rough ER 3
Put the events in order:
A. Unfinished protein enters the rough ER 4
B. Instructions leave the nucleus 1
C. Protein is folded into the correct shape 5
D. Vesicle forms 7
E. Ribosome polymerizes amino acids 2
F. Ribosome releases the unfinished protein 3
G. Protein is shipped out of the cell 8
H. Folded protein enters the Golgi apparatus 6
Identify the organelle labeled “B” in the micrograph below.
Nucleus
B
C
A
Identify the organelle labeled “C” in the micrograph below.
Rough ER
B
C
A
Identify the organelles labeled “A” in the micrograph below.
Ribosomes (attached)
B
C
A
Describe the function of the organelle labeled “B”.
Tells the ribosomes which proteins to make and how to make
them
B
C
A
Describe the function of the organelles labeled “A.”
Make protein by polymerizing amino acids
B
C
A
Describe the function of the organelle labeled “C.”
Finishes protein by folding it into the correct shape
B
C
A