Week 1

Question 1

Why don’t RBCs have nuclei and are biconcave

Answer 1

• so viruses can’t hijack genes
• so more hemoglobin can bind

Question 2

Prokaryotes VS eukaryotes

don’t forget size

Answer 2

pro
- simple internal organization
- nucleoid - no membrane
- single cell, but can have colonies
- fission
- plasma membrane
- 1-5 nm

eu
- plants, animals, fungi (multicell), yeasts (unicell), protazoan (unicell)
- membrane-bound nucleus
- compartmentalized activities
- 10-100 nm

Question 3

Prokaryotes AND eukaryotes

Answer 3

both
- plasma membranes
- cytoplasm
- DNA
- A system for transcribing and translating genetic information into proteins