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Chapter 16 The Cytoskeleton Cell and Molecular Biology

Total questions: 48

Worksheet time: 16mins

Name
Class
Date
1.

Which part of the cell is made up of a network of filaments that maintains the cell structure?

a)

Cytoplasm

b)

Endoplasmic reticulum

c)

Cytoskeleton

d)

Vacuoles

2.

Which filaments are built from molecules of protein actin?

a)

Microtubules

b)

Microfilaments

c)

Intermediate filaments

d)

Cilia and flagella

3.

Channels that perforate plant cell wall

a)

Plasmodesmata

b)

Tight junctions

c)

Desmosomes

d)

Gap junctions

4.

Which of the following is the main function of intermediate filaments?

a)

Cytoplasmic streaming

b)

Cellular motility

c)

Separate chromosomes in dividing cells

d)

Fix organelles in place

5.

Intermediate filaments are found in what structure?

a)

The mitotic spindle

b)

Desmosomes

c)

Cilia

d)

Centrosome

6.

Breakdown of molecules one of life processes in eukaryotic cells, which involves

a)

Lysosomes

b)

Peroxisomes

c)

Vacuoles

d)

All of the above

7.

Structural support, movement and communication of the cell involve:

a)

Cytoskeleton

b)

Plasma membrane

c)

Cell wall

d)

All of the above

8.

Microfilaments play major role in:

a)

Formation of nuclear lamina

b)

Cleavage furrow

c)

Chromosomes movements

d)

All of the above

9.

….. is not contains microfilaments protein.

a)

Microvilli

b)

centrioles

c)

Plant cell

d)

Muscle cell

10.

Motion of flagella is not:

a)

Covers freshwater protozoan Colpidium

b)

Driving cell in the same direction

c)

Snake like

d)

Powered by ATP

11.

One of the following is composed of actin subunit:

a)

Microtubules

b)

Intermediate filaments

c)

Microfilaments

d)

All of the above

12.

Which of the following is microfilaments function?

a)

Chromosomes movements

b)

Cleavage furrow formation

c)

Formation of nuclear lamina

d)

None of the above

13.

Which of the following is microtubule function?

a)

Chromosomes movements

b)

Cleavage furrow formation

c)

Formation of nuclear lamina

d)

None of the above

14.

Which of the following is mismatch with flagellum characteristic?

a)

Drive the cell in the same direction

b)

Contains dynein protein

c)

Can slide far

d)

Snake like movements

15.

Which of the following is correct regarding cilia characteristic?

a)

Drive the cell in the same direction

b)

Contains dynein protein

c)

Can slide far

d)

Snake like movements

16.

Which of the following is not ECM components?

a)

Carbohydrates

b)

Protein

c)

Cholesterol

d)

Macromolecules

17.

Peroxisomes function is involved in:

a)

Manufacturing process

b)

Breakdown of molecules process

c)

Energy processing

d)

Structural support, movement and communication

18.

Nucleus function is involved in:

a)

Manufacturing process

b)

Breakdown of molecules process

c)

Energy processing

d)

Structural support, movement and communication

19.

Which of the following intercellular junction contains keratin?

a)

Tight junction

b)

Gap junction

c)

Desmosomes

d)

All of the above

20.

Which cellular junction is not found in animal cell?

a)

Tight junction

b)

Desmosomes

c)

Gap Junction

d)

Plasmodesmata

21.

Which of the following is found in the nucleus of animal cells?

a)

Microtubules

b)

Actin filaments

c)

Microfilaments

d)

Intermediate filaments

22.

Which of the following are found only in animal cells?

a)

Intermediate filaments

b)

Microtubules

c)

Nucleus

d)

Microfilaments

23.

Cilia and flagella are …..

a)

Intermediate filaments

b)

Microfilaments

c)

Microtubules

d)

Phospholipids

24.

Microtubules are formed of the protein ……..

a)

Dynein

b)

Keratin

c)

Tubulin

d)

Actin

25.

Cytoskeletal filaments are polymers of ………

a)

Ribonucleic acid

b)

Protein

c)

Deoxyribonucleic acids

d)

Carbohydrates

26.

Cytoskeleton filaments share in:

a)

Change in cell shape

b)

Maintenance of cell shape

c)

Cell division

d)

Cell motility

27.

What is mismatch with cytoskeleton`s a network?

a)

organizes structures and activities in the cell

b)

communicates between cells in many types of tissues

c)

gives mechanical support to the cell

d)

composed of protein polymers

28.

What of the following is mismatch with microfilaments functions?

a)

muscle contractions

b)

cytoplasmic streaming

c)

chromosome movements

d)

cell motility

29.

What of the following is mismatch with Ciliary motion?

a)

Direction perpendicular to the axis

b)

Back and forth motion

c)

Covers Colipidium protozoan

d)

Bend begins at the top of the cilium

30.

What of the following is mismatch with tight junctions?

a)

forming continuous seals around the cells.

b)

prevent leakage of extracellular fluid.

c)

small molecules and ions pass through.

d)

connect epithelial cells.

31.

All of the following are plant cell wall components except:

a)

Cellulose

b)

Lipid

c)

Protein

d)

Polysaccharides

32.

Specific proteins forming continuous seals around the cells are involved in:

a)

Tight junction

b)

Gape Junction

c)

Desmosomes

d)

All of the above

33.

Junctions are necessary for comunications between cells in many types of tissues including animal embryos and heart muscles.

a)

Tight junctions

b)

Desmosomes

c)

Gap junctions

d)

All of the above

34.

Responsible with protein myosin in muscle cell contraction

a)

Actin filamints

b)

Tubulin polymers

c)

Intermediate filamints

d)

None of the above

35.

Anchorage of nucleus and certain other organelles

a)

Microtubules

b)

Microfilaments

c)

Actin Filaments

d)

Intermediate filaments

36.

Which of the following contain the 9+2 arrangement of microtubules?

a)

cilia

b)

centrioles

c)

flagella

d)

Cilia and flagella

37.

Actin and myosin filaments are most abundant in …… cells

a)

connective

b)

Muscle

c)

Epithelial

d)

nerve

38.

The bending movements of cilia and flagella:

a)

Involves dynein action of microfilaments

b)

are associated with microtubules

c)

are produced when dynein motors pull adjacent microtubules doublets past each other.

d)

involve the alternate assembly and disassembly of actin filaments.

39.

Which of the following is NOT a function of the cytoskeleton?

a)

Transporting of molecules within the cell

b)

Transporting of molecules into the cell

c)

Cell movement

d)

Anchoring the cell

40.

The extracellular matrix is thought to participate in the regulation of the animal cell behaviour by communicating information from the outside to inside of the cell via which of the following?

a)

DNA and RNA

b)

Nucleus

c)

Integrin

d)

Gap junction

41.

Identify the true statement(s).

a)

Dynein always moves toward the plasma membrane.

b)

Dynein is responsible for movement of microvilli.

c)

Myosin motors move along actin proteins.

d)

Myosin motors move along actin proteins and Dynein always moves toward the plasma membrane.

42.

Which characteristic regarding microfilaments is incorrect?

a)

They serve as mechanical stiffeners for microvilli.

b)

They are composed of actin subunits.

c)

They are involved in cell locomotion.

d)

They form mitotic spindles.

43.

Choose the incorrect statement about the cytoskeleton.

a)

It may help organize groups of enzymes.

b)

It is involved cilia movements.

c)

It is involved in replication of DNA

d)

It has components within microvilli

44.

Microfilaments are well known for their role in which of the following:

a)

Amoeboid movements.

b)

Formation of cleavage furrows.

c)

Contracting of muscle cells.

d)

All of the above

45.

Endoplasmic reticulum is classified as …. process.

a)

Breakdown of molecule

b)

Energy processing

c)

Manufacture

d)

Structural support, movement and communication

46.

Communication junction is

a)

desmosomes

b)

plasmodesmata

c)

gap junction

d)

tight junction

47.

Plasmodesmata in plant cell are most similar in function to which of the following structures in animal cells:

a)

Gap junction

b)

Tight junction

c)

Extracellular matrix

d)

Desmosomes

48.

Gap junction is found in ….

a)

Epithelial cells

b)

Animal embryos

c)

Heart muscle

d)

B+C

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