chapter 5 eukaryotic and microorganism

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1

Which of the following terms best describes the first primitive eukaryotes?

A)multicellular

B)single-celled

C)photosynthetic

D)specialized

B)single-celled

2

Endosymbiosis proposes that

A)eukaryotic cells arose when a much larger prokaryotic cell engulfed smaller bacterial cells that eventually developed into organelles.

B)two separate organisms can live in a symbiotic commensal relationship as long as one is a prokaryotic cell.

C)two separate organisms can live in a symbiotic parasitic relationship as long as one is a prokaryotic cell.

D)organelles formed in eukaryotic cells by invagination of cell membranes and insertion of DNA into the membrane-enclosed areas.

A)eukaryotic cells arose when a much larger prokaryotic cell engulfed smaller bacterial cells that eventually developed into organelles.

3

Identify which of the following is theorized to have developed and can be explained by the endosymbiotic theory.

A)vacuoles

B)Golgi apparatus

C)mitochondria

D)cell wall

C)mitochondria

4

Eukaryotic flagella whip back and forth rather than rotating. This is because within a eukaryotic flagellum we typically find

A)a 9+2 arrangement of microtubules which slide past each other during movement.

B)a 7+2 arrangement of microfilaments which slide along the external filaments.

C)a 5+4 arrangement of cellulose fibers which twist back and forth.

D)9 pairs of microtubules which surround the interior of the cell.

A)a 9+2 arrangement of microtubules which slide past each other during movement

5

Eukaryotic cells have several structural attributes which separate them from prokaryotes. Which of these attributes are found in eukaryotes, but NOT found in prokaryotes?

A)peptidoglycan walls, cell membrane, nucleoid

B)larger size, organelles, nuclear membrane

C)ribosomes, chromosomes, cytoplasm

D)enzymes, chromatin, DNA

B)larger size, organelles, nuclear membrane

6

Before mitosis, chromosomes are visible only as

A)microtubules.

B)matrix.

C)chromatin.

D)spindle fibers.

C)chromatin.

7

Where is the site for protein modification in a eukaryotic cell?

A)inside the nucleus

B)in the chloroplasts

C)between adjacent ribosomes

D)in the Golgi complex

D)in the Golgi complex

8

Lysosomes are vesicles that

A)originate from the rough endoplasmic reticulum.

B)are involved in intracellular digestion of food particles.

C)contain fluids or solid particles to be digested, excreted, or stored.

D)contain fats and glycogen.

B)are involved in intracellular digestion of food particles.

9

The bulk of the energy required by the eukaryotic cell is generated by the mitochondria. The mitrochondrion consists of cristae that

A)form a smooth, continuous outer membrane surrounding the entire organelle.

B)form a complex fluid called a matrix outside the organelle.

C)are elaborate folds on the inner membrane which hold the enzymes and electron carriers of aerobic respiration.

D)are circular strands of DNA involved in producing the enzymes needed for anaerobic respiration.

C)are elaborate folds on the inner membrane which hold the enzymes and electron carriers of aerobic respiration.

10

Chloroplasts convert the solar energy from sunlight into

A)heat energy.

B)chemical energy.

C)mechanical energy.

D)electrical energy.

B)chemical energy

11

Ribosomes are found free within the cytoplasm as well as bound to rough endoplasmic reticulum. They are the sites of

A)photosynthesis.

B)digestion.

C)protein synthesis.

D)energy production.

C)protein synthesis.

12

Identify the structure that does NOT have a double membrane protecting it.

A)nucleus

B)chloroplast

C)mitochondria

D)ribosome

D)ribosome

13

The Kingdom Fungi, or Myceteae, consist of macroscopic fungi and microscopic fungi. Identify the microscopic fungi from the following list:

A)mushrooms

B)puffballs

C)kelp

D)yeast

D)yeast

14

Most fungi are _____________, and get their food via _____________.

A)photosynthetic, solar energy.

B)autotrophic, chemical energy.

C)saprobes, extracellular digestion.

D)heterotrophic, ingestion.

C)saprobes, extracellular digestion

15

Which of the following is NOT one of the four major divisions among terrestrial fungi?

A)zygomycota

B)ascomycota

C)basidiomycota

D)mastigophora

D)mastigophora

16

Filamentous fungi

A)are photosynthetic & found in marine environments.

B)produce buds during sexual reproduction.

C)have hyphae that make up mycelia.

D)all of the above are true.

C)have hyphae that make up mycelia

17

Mycoses are

A)toxins produced by fungi.

B)fungal infections.

C)the group of fungi which are primarily filamentous.

D)allergic responses to fungal material.

B)fungal infections.

18

Kingdom Protista includes

A)archaea & monera.

B)kelp & fungi.

C)parasitic worms.

D)algae & protozoans.

D)algae & protozoans.

19

Protozoa are primarily

A)free-living.

B)pathogenic.

C)parasitic.

D)photosynthetic.

A)free-living

20

Protist survival is limited mainly by

A)host availability.

B)availability of moisture.

C)speed at which they can bud off new cells.

D)trophozoite size.

B)availability of moisture.

21

Protozoans are often able to survive changing environmental conditions by forming

A)trophozoites.

B)eggs.

C)spores.

D)cysts.

D)cysts.

22

Algae can cause health problems because

A)they are parasitic.

B)they inhabit animal tissues preferentially.

C)they may produce toxins.

D)all of the above are true.

C)they may produce toxins.

23

Helminths are

A)fungi.

B)protozoans.

C)algae.

D)animals.

D)animals.

24

Organisms that are unicellular, colonial, filamentous, and photosynthetic would include the

A)fungi.

B)protozoans.

C)helminths.

D)algae.

D)algae.

25

Identify the helminth that reproduces through eggs released from proglottids.

A)tapeworm

B)amoeba

C)trypanosome

D)pinworm

A)tapeworm