Below are four statements about the structure of prokaryotic cells.

1. No prokaryotic cell has DNA that is associated with proteins. 2. No prokaryotic cell has membrane-bound organelles. 3. All prokaryotic cells have one or more flagella. 4. All prokaryotic cells have smaller ribosomes than eukaryotic cells.

Which statements about the structure of prokaryotic cells are correct?

Tick (✓) one box.

☐ A statements 1, 2 and 3

☐ B statements 1, 2 and 4

☐ C statements 2, 3 and 4

☐ D statements 1, 2, 3 and 4

Calculate the mean number of bacteria in the undiluted bottle of liquid culture containing novobiocin.

Give your answer in standard form. Show your working.

Answer ______________ bacteria

Starting with a single bacterium, calculate how many generations it would take to produce at least the number of bacteria you have calculated for your answer in Question 03.2

You can assume no bacteria die.

You could use the ln or log button on your calculator to calculate your answer.

Answer ______________ generations

M. luteus is not resistant to chloramphenicol.

Suggest two reasons why the bacteria were able to grow in the culture containing chloramphenicol.

1

2