Biology

Peter H. Raven, George B. Johnson, Kenneth A. Mason

Chapter 28

Prokaryotes - all with Video Answers

Educators

Chapter Questions

Problem 1

Which of the following would be an example of a biomarker?
a. A microfossil found in a meteorite
b. A hydrocarbon found in an ancient rock layer
c. An area that is high in carbon- 12 concentration in a rock layer
d. A newly discovered formation of stromatolites

Christina Sorrentino

Christina Sorrentino

Numerade Educator

Problem 2

A cell that can use energy from the sun, and $\mathrm{CO}_{2}$ as a carbon source is a
a. photoautotroph.
b. chemoautotroph.
c. photoheterotroph.
d. chemoheterotroph.

Michelle Bandeira

Michelle Bandeira

Numerade Educator

Problem 3

Gram-positive $(+)$ and gram-negative $(-)$ bacteria are characterized by differences in
a. the cell wall: gram + have peptidoglycan, gram- have pseudopeptidoglycan.
b. the plasma membrane: gram + have ester-linked lipids, gramhave ether-linked lipids.
c. the cell wall: gram+ have a thick layer of peptidoglycan and gram- have an outer membrane.
d. chromosomal structure: gram+ have circular chromosomes, gram- have linear chromosomes.

Michelle Bandeira

Michelle Bandeira

Numerade Educator

Problem 4

Which of the following characteristics is unique to the archaea?
a. A fluid mosaic model of plasma membrane structure
b. The use of an RNA polymerase during gene expression
c. Ether-linked phospholipids
d. A single origin of DNA replication

Michelle Bandeira

Michelle Bandeira

Numerade Educator

Problem 5

The horizontal transfer of DNA using a plasmid is an example of
a. generalized transduction.
b. binary fission.
c. transformation.
d. conjugation.

Michelle Bandeira

Michelle Bandeira

Numerade Educator

Problem 6

The disease tuberculosis is
a. caused by a bacterial pathogen.
b. an emerging disease that is now worldwide.
c. caused by a viral pathogen.
d. not treatable with antibiotics.

Michelle Bandeira

Michelle Bandeira

Numerade Educator

Problem 7

Prokaryotes participate in the global cycling of
a proteins and nucleic acids.
b. carbon and nitrogen.
c. carbohydrates and lipids.
d. All of the choices are correct.

Michelle Bandeira

Michelle Bandeira

Numerade Educator