Exam 2, Part 2


You have 1 hour and 30 minutes to complete this part of the exam.
Write your responses to the questions on the answer sheet provided.
Each response is worth up to 3 points unless otherwise noted.
You may use your notes, any textbooks and the Internet.

All responses must be in your own words, with sources mentioned (no need to formally cite, but do give credit) when applicable. Plagiarism of any kind will be reported to the Lesley University Academic Integrity Committee.

1. Below is a painting by David Goodsell depicting a mycoplasma cell which has a diameter of 0.25µm (micrometers). The orange strands running throughout the interior is DNA. Ribosomes are shown in magenta, while phosopholipids are show in light green.

a. Based on the information presented here, is mycoplasma a prokaryote or eukaryote? Give two reasons why.

b. Mycoplasma can cause illness in humans. If a mycoplasma cell is found by a macrophage (a type of immune system cell), it will be taken into the macrophage to be digested and rendered harmless. What is this process is involved in this phenomenon and what steps are involved?
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Exam 1: tentatively scheduled for March 2nd

As mentioned in class, our first exam will cover the first 3 sections of the course, The Science of Life, Basic Chemistry and Biological Macromolecules. We’re heading into the third section now, and if we’re on track to complete that in about a week, the first exam will take place on March 2nd. You’ll have the entire class session to work on the exam and you may use any notes you’ve taken (if you have notes you’ve typed up, you may use printouts) but may not use a textbook or the Internet.