TRY OUT CELL PROCARYOTIC & EUCARYOTIC

1. The arrangement of microtubules in eukaryotic flagella is referred to as

   A)     undulating

   B)     basal

   C)     9+2

   D)     ciliary

2.Which of the following is not a characteristic of prokaryotes?

   A)     DNA

   B)     cell membrane

   C)     cell wall

   D)     endoplasmic reticulum

3. The term "nuclear envelope" is more correct than the term "nuclear membrane" because

   A)     the enclosure has pores which membranes do not

   B)     the enclosure is made up of two membranes

   C)     the chemical composition is inconsistent with cellular membranes

   D)     None of the above. The two terms are perfect synonyms.

4. Oxidative metabolism is carried out ____ of mitochondria.

   A)     in the intermembrane space

   B)     on the surface of the inner membrane

   C)     in the inside of the outer membrane

   D)     in the matrix

5. Ribosomes are made up of ____ subunits.

   A)     0 (They are whole.)

   B)     2

   C)     3

   D)     4

6. Proteins synthesized by the rough ER are

   A)     for internal storage

   B)     to build more membranes in the cell

   C)     to digest food in lysosomes

   D)     for internal regulation

   E)      exported from the cell

7. Plants differ from animals in that plants have

   A)     an endoplasmic reticulum

   B)     a central vacuole

   C)     Golgi complexes

   D)     vesicles

   E)      organelles

8. Passage through pores in the nuclear envelope is restricted primarily to

   A)     proteins, RNA, and protein-RNA complexes

   B)     lipids and glycolipids

   C)     DNA and RNA

   D)     RNA and protein-carbohydrate complexes

   E)      marker proteins for the plasma membrane

9. In bacteria, some of the functions of eukaryotic cells are performed by

   A)     vesicles

   B)     lysosomes

   C)     mitochondria

   D)     nucleoli

   E)      the plasma membrane

10.Glycoproteins and glycolipids assembled in Golgi bodies are packaged for distribution in

   A)     cisternae

   B)     lysosomes

   C)     peroxisomes

   D)     liposomes

   E)      glyoxysomes

11.Within chloroplasts, light is captured by

   A)     grana within cisternae

   B)     thylakoids within grana

   C)     cisternae within grana

   D)     grana within thylakoids

   E)      none of the above

12.The rough ER is so named because it has an abundance of _______________ on it.

   A)     mitochondria

   B)     lysosomes

   C)     Golgi bodies

   D)     ribosomes

   E)      vesicles

13.With which of the following are basal bodies not associated?

   A)     animal cells

   B)     centrioles

   C)     plant cells

   D)     tubulin

   E)      microtubules

14.Depolymerization of microtubules is inhibited by

   A)     kinesin

   B)     dyneins

   C)     actin

   D)     guanosine triphosphate

   E)      vimentin

15.Bacteria may be propelled by

   A)     rotating thread-like flagellum

   B)     cilia

   C)     undulating 9+2 type flagellum

   D)     gel-sol changes in the cytoplasm

   E)      an undulating thread-like flagellum

16.The bacterial cell wall is composed of

   A)     a phospholipid matrix

   B)     a lipoprotein

   C)     a polymer of sugars

   D)     chitin

   E)      a structural protein

17.Unlike those of prokaryotes, eukaryotic cell walls are composed of

   A)     a carbohydrate matrix cross-linked by short polypeptides

   B)     glycolipids and protein fibers

   C)     cellulose fibers embedded in a matrix

   D)     chitin

   E)      proteins and histones

18.A gram-negative bacterium is enclosed by

   A)     a single thick wall

   B)     a single thin wall

   C)     a double thick wall

   D)     a double thin wall

   E)      no wall, just a plasma membrane

19.The cytoplasm of a bacterium

   A)     is supported by the cytoskeleton

   B)     is supported by microtubules

   C)     is supported by keratin

   D)     has no internal support structure

   E)      is supported by folds in the interstitial membrane

20.A gram-positive bacterium is stained _______________ by the gram stain

   A)     pink

   B)     purple

   C)     blue

   D)     green

   E)      red

21.Clusters of rRNA where ribosomes are assembled are called

   A)     nuclei

   B)     cisternae

   C)     nucleoli

   D)     Golgi complexes

   E)      centrioles

22.Mitochondrial enzymes for oxidative metabolism are

   A)     on or within the surface of cristae

   B)     located on the outer membrane

   C)     in the matrix

   D)     floating freely in intermembrane space

   E)      in mitochondrial lysosomes

23.The smooth ER is especially abundant in cells that synthesize extensive amounts of

   A)     toxins

   B)     proteins

   C)     enzymes

   D)     lipids

   E)      nucleic acids

24.Enzymes embedded in the membrane of the smooth ER

   A)     synthesize lipids

   B)     may be used for detoxification

   C)     synthesize carbohydrates

   D)     mostly are active only when associated with a membrane

   E)      all of the above

25.Which of the following organelles is found in plant cells but not in animal cells?

   A)     ribosomes

   B)     endoplasmic reticulum

   C)     mitochondria

   D)     peroxisomes

   E)      None of the above

26.Most cells are very small. A typical eukaryotic cell, both plant and animal, will occur in which of the following size ranges?

   A)     1 mm to 100 µm

   B)     100 µm to 10 µm

   C)     10 µm to 1 µm

   D)     1 µm to 100 nm

   E)      100 nm to 10 nm

27.A cell that measures 200 µm in diameter compared to a cell that measures 20µm will have 100 times the surface area but 1000 times the volume.

   A)     True

   B)     False

28.Because they have chloroplasts for energy production, plant cells lack mitochondria.

   A)     True

   B)     False

29.Assuming all other factors to be the same, electron microscopes have greater resolving power than light microscopes because.

   A)     the wavelength of electrons is much longer than the wavelength of visible light

   B)     electron microscopes have more lenses

   C)     because the beams in electron microscopes overlap creating a clearer picture

   D)     because the wavelengths in visible light are longer than with electrons

   E)      because electron microscopes are compound microscopes

30. Bacterial flagella propel the cell by using

   A)     a whipping-like motion

   B)     two flagella that move in opposite directions, like a flutter kick

   C)     a rotating motion

   D)     a flicking motion

   E)      none of the above

31.Which characteristic do eukaryotic and prokaryotic flagella have in common?

   A)     chemical composition

   B)     structure

   C)     location in the cell

   D)     function

   E)      source of energy

32.The microtubules of cilia and flagella are organized in a characteristic 9 + 2 pattern, and they slide past one another.

   A)     True

   B)     False

33.Proteins lacking a signal peptide sequence will probably be secreted from the cell.

   A)     True

   B)     False

34.According to the endosymbiotic theory, the infoldings and specializations of the plasma membrane led to the evolution of the endomembrane system.

   A)     True

   B)     False

35.The cytoskeleton includes all of the following except

   A)     microtubules

   B)     intermediate filaments

   C)     myosin filaments

   D)     actin filaments

   E)      all of the above are included

36.Ribosomes are found

   A)     only in the nucleus

   B)     in the cytoplasm

   C)     attached to the smooth endoplasmic reticulum

   D)     only in eukaryotic cells

   E)      both b and c

37.The Golgi apparatus is involved in

   A)     transporting proteins that are to be released from the cell

   B)     packaging proteins into vesicles

   C)     altering or modifying proteins

   D)     producing lysosomes

   E)      all of the above

ANSWER

1. 1.   C      2.  D     3. B    4.  B    5.  B    6.  E    7.  B    8.  A    9. E   10. A
2. 11. B     12. D    13. C   14. D    15.A    16. C   17. C   18. D   19. D  20.  B
3. 21. C     22. A    23. D   24. E    25.E    26. B    27.A   28. B   29. D   30. C
4. 31. D     32. A    33. B   34. B    35.C    36. B    37. E