Chapter 1 - Eukaryotic Cell

Question 1

How do proteins diffuse? Do they rotate?

Answer 1

Proteins diffuse laterally, don’t rotate due to hydrophillic/phobic regions, rotating is not energetically favoured.

Question 2

What interactions would cause peripheral proteins to bind to integral membrane proteins?

Answer 2

Electrostatic interactions.

Not hydrophic, not van der waals, not covalent

Question 3

What is the cell cycle?

Answer 3

IPMAT: interphase, prophase, metaphase, anaphase, telophase where interphase is G1, synthesis, G2

Question 4

What is the role of centrioles

Answer 4

Centrioles produce microtubules needed for spindle fibres to attach to centromeres

Question 5

What happens to newly synthesised molecules ready for cellular secretion?

Answer 5

Become encased in golgi apparatus ready for exocytosis

Question 6

Define role of:
mitochondria
lysosomes
endoplasmic reticulum

Answer 6

mitochondria - produce energy through aerobic respiration
lysosomes - suicide sacs gets rid of diseased cells
ER: synthesis centre