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Understanding Biology

Kenneth A. Mason, Tod Duncan, George B. Johnson

Chapter 23

Prokaryotes and Viruses - all with Video Answers

Educators


Section 1

Prokaryotes Are the Most Ancient Organisms

01:01

Problem 1

Prokaryotic cellular organization is characterized by all of the following EXCEPT
a. lipid bilayer plasma membranes.
b. cell walls.
c. a nucleus.
d. ribosomes.

Joanna Quigley
Joanna Quigley
Numerade Educator
01:04

Problem 2

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