Self Quiz for Bacterial Growth

Study the material in this section and then write out the answers to these question.
Do not just click on the answers and write them out. This will not test your understanding of this tutorial.

1. Match the following:

_____ A population doubles every generation time. (ans)

_____ One cell splits in two. (ans)

_____ The time it takes for a population of organisms to double in number. (ans)

a. binary fission
b. generation time
c. geometric progression

2. If you started with 1000 E. coli with a generation time of 30 minutes, how many bacteria would you have after 3 hours? (ans)

3. Match the following:

_____ Phase where the population grows slowly or stops growing because of decreasing food, increasing waste, and lack of space. The rate of replication is balanced out by the rate of inhibition or death. (ans)

_____ Phase where the population dies exponentially from the accumulation of waste products, although the rate of death depends on the degree of toxicity and the resistance of the species. (ans)

_____ Phase where growth is relatively flat and the population appears either not to be growing or growing quite slowly. During this phase the newly inoculated cells are adapting to their new environment and synthesizing the molecules they will need in order to grow rapidly. (ans)

_____ Phase where the population increases geometrically as long as there is sufficient food and space for growth. (ans)

A. Lag phase
B. Exponential (log) growth phase
C. Stationary phase
D. Death (decline) phase

• RETURN TO "BACTERIAL GROWTH"
• RETURN TO UNIT 7 TABLE OF CONTENTS

Gary E. Kaiser, Ph.D.
Professor of Microbiology
The Community College of Baltimore County, Catonsville Campus
This work is licensed under a Creative Commons Attribution 4.0 International License.
Based on a work The Grapes of Staph at https://cwoer.ccbcmd.edu/science/microbiology/index_gos.html.