Week 3 Quiz

Question 1

For cells growing in a liquid, what are the three phases of the growth pattern?

Answer 1

1. Lag Phase
2. Logarithmic Phase
3. Stationary Phase

Question 2

The cells are adapting to their environment and there is little overall change in the population size.

Answer 2

Lag Phase

Question 3

The population is growing exponentially, meaning that on average every cell is replicating at some constant rate.

Answer 3

Logarithmic Phase

Question 4

Replication slows down due to the depletion of nutrients in the medium. Eventually, the cells will die resulting in a decrease in population size.

Answer 4

Stationary Phase

Question 5

Escherichia coli

Answer 5

Bacterium

Question 6

Saccharomyces cerevisiae

Answer 6

Yeast

Question 7

Chlamydomonas reinhardtii

Answer 7

Algae

Question 8

Tetrahymena is used to study subcellular structures like:

Answer 8

organelles and cilia, processes like the cell cycle, activity like cell motility and specifically in this lab, phagocytosis.

Question 9

In tetrahymena, where does phagocytosis take place?

Answer 9

The oral groove

Question 10

Tetrahymena is a ____________ feeder.

Answer 10

Nondiscriminating

Question 11

India ink stains the cell _______ ________.

Answer 11

Internal vacuoles