The Diversity of Prokaryotes 1) Bacterial cell waills contain 12) vhich structur

Question

The Diversity of Prokaryotes 1) Bacterial cell waills contain 12) vhich structure enables a bacterium to A) cellulose survive and nfect a host even after a long period of B) chitin A) Protein coat D) pectin E) starch. C) Capsule D) Sime layer E) Endospore 3) The classification of bacteria has been based on 14) Sex pili are prokaryotic structures that are used A) during binary fission. B) for movement. C) for adhering to surfaces D) during conjugation E) for gathering prey A) nutrient requirements and pigments B) the appearance of colonies and rate of C) the means of locomotion and thickness of cell wall D) pigments and presence of flagella. E) microbial nutrition, physical appearance, and how they move. 15) Binary fission is the method by which bacteria 4) What differentiates gram-positive bacteria from gram-negative bacteria? A) survive extreme conditions for long periods of time B) reproducnetic C) acquire genetic variation D) move to new locations. E) metabolize without oxygen. A) Nutrient requirements B) The appearance of colonies C) The means of locomotion D) The way the cell wall stains E) The use of oxygen 5) In which of these environments would you normally find prokaryotes? A) An animalrs intestinal tract B) A single drop of seawater C) Human skin 16) Through which process are bacteria able to exchange genetic material? A) Endospore formation B) Photosynthesis C) Conjugation D) Sexual reproduction E) Anaerobic respiration D) A spoonful of soil E) All of the above-just about everywhere 6) Which of the following is within the size range of a typical prokaryote? A) A cell 2 micrometers in diameter B) A cell 25 micrometers in diameter 18) Cyanobacteria obtain energy fronm A) digesting plants B) digesting cyanide C) digesting benzene. D) sunlight. C) A cell 100 micrometers in diameter D) A cell 700 micrometers long E) A cell the size of the period at the end of a sentence E) parasitizing viruses 19) In bacteria, the small, circular pieces of DNA that are located outside the chromosome are called A) plasmids. 7) Mobile prokaryotes can move with the help of A) peptidoglycan. B) sex pili C) flagella. D) plasmids E) endospores C) flagela D) endospores E) bacteriophages. Copyright © 2014 Pearson Education, Inc.

Explanation / Answer

1.
Option C is correct.
Bacterial cell walls are composed of Peptidoglycan (NAG + NAM).
Gram-positive bacteria contain a thick cell wall compared gram-negative bacteria.

2.
Option C is correct.
Bacterial classification is based on multiple factors.
The famous factor considered for classification is the thickness of cell wall.
Gram-positive bacteria contain a thick cell wall compared gram-negative bacteria.

4.
Option D is correct.
Bacterial classification is based on multiple factors.
The famous factor considered for classification is the thickness of cell wall.
Gram-positive bacteria contain a thick cell wall compared gram-negative bacteria.
Gram-positive bacteria stain purple and gram-negative bacteria stain red in gram staining procedure.

5.
Option E is correct.
Microorganisms are ubiquitous.

6.
Option A is correct.
Size range of prokaryotic cells = 0.1-5 um
Prokaryotic cells are smaller than eukaryotic cells (10 - 100 um)

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