1) Which of the following conditions would you expect to find a cell with a
high numbers of bound ribosomes?
a.
b.
c.
d.
a cell that is secreting proteins
a cell that is producing cytoplasmic enzymes
a cell that is constructing its cell wall or extracellular matrix
a cell that is digesting food particles
2) Liver is involved in detoxification of many poisons and drugs. Which of the
following structures is primarily involved in this process and therefore abundant
in liver cells?
a.
b.
c.
d.
rough ER
smooth ER
Golgi apparatus
Nuclear envelope
3) Cells of the pancreas will incorporate radioactively labeled amino acids into
proteins. This "tagging" of newly synthesized proteins enables a researcher to
track their location. In this case, we are tracking an enzyme secreted by
pancreatic cells. What is its most likely pathway?
‫ أى من هذه المسارات‬.‫(بعض من األحماض األمينية المشاركة في تكوين بروتينات خاليا البنكرياس تكون مشععة ليسهل متابعتها‬
)‫صحيح بالنسبة لإلنزيمات المتكونة والتي تفرز من الخلية؟‬
a.
b.
c.
d.
ER → lysosomes → vesicles that fuse with plasma membrane
ER → Golgi → vesicles that fuse with plasma membrane
ER → Golgi → nucleus
nucleus → ER → Golgi
4) Which type of organelle is primarily involved in the synthesis of oils,
phospholipids, and steroids?
a.
b.
c.
d.
lysosome
smooth endoplasmic reticulum
mitochondrion
ribosome
5) The Golgi apparatus has a polarity to its structure and function. Which of the
following statements correctly describes this polarity?
a. Transport vesicles fuse with one side of the Golgi and leave from the
opposite side.
b. Proteins in the membrane of the Golgi may be sorted and modified as they
move from one side of the Golgi to the other.
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c. Lipids in the membrane of the Golgi may be sorted and modified as they
move from one side of the Golgi to the other.
d. All of the above correctly describe polar characteristics of the Golgi
function.
6) Which is one of the main energy transformers of cells?
a.
b.
c.
d.
lysosome
vacuole
mitochondrion
peroxisome
7) Which of the following contains enzymes that produce H2O2 as intermediate
product?
a.
b.
c.
d.
lysosome
golgi apparatus
ribosome
peroxisome
8) The mitochondrion, like the nucleus, has two membranes. How is the inner
membrane different from that of the nucleus?
a.
b.
c.
d.
inner nuclear membrane is highly folded (infolded).
The outer membrane of mitochondria is highly folded.
The space between the two layers of the nuclear membrane is larger.
inner mitochondrial membrane is highly folded.
9) Microfilaments are considered a part of the ______.
a.
b.
c.
d.
mitochondrion
cytoskeleton
microtubules
a&b
10) The differences among the three categories of cytoskeletal elements would
suggest that each of the following has specialized roles. Which of the following is
a correct match?
a. microfilaments and cell shape
b. microtubules and chromosome separation
c. intermediate filaments and materials transport
d. all above
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13) which of the following is true for the cell membrane?
a.
b.
c.
d.
phosphate group is hydrophobic
fatty acid tail is hydrophilic
phosphate group is hydrophilic
a&b
14) Prokaryote differs from eukaryote in that its nucleus has no
a.
b.
c.
d.
ribosomes
nuclear envelop
DNA
RNA
15) which statement is correct for nuclear envelop?
a.
b.
c.
d.
Coils up to be a chromosome.
Has no pores to path material through.
Maintains the shape of nucleus.
Synthesizes protein
Write down the 3 points of Cell Theory
1)
_____________________________________________________________.
2)
_____________________________________________________________.
3)
_____________________________________________________________.
Organelles
Structure
Function
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What is the meaning of:
Chromatin
the DNA and associated proteins are organized into fibrous material,
chromatin.
chromosomes
the chromatin fibers coil up to be seen as separate
Ribosomes
ribosomal RNA (rRNA) and protein.
amphipathic molecules.
Amphipathic molecules have both hydrophobic and hydrophilic regions.
fluid mosaic model.
proteins embedded or attached to a double layer of phospholipids in cell
membrane
Cell membrane is fluid
Most of the lipids and some proteins can drift laterally in the plane of the
membrane
Integral proteins
transmembrane protein or penetrate the hydrophobic core of the lipid
bilayer
Cell-cell recognition
is the ability of a cell to distinguish one type of neighboring cell from
another.
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1.
a
2.
b
3.
b
4.
b
5.
d
6.
c
7.
d
8.
d
9.
b
10.
b
13. c
14. b
15. c
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Organelle
Structure
Function
ER
Golgi
apparatus
Mitochondria
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