1. you have a bilayer with equal amounts of saturated and UNsaturated phospholipids. After testing the permeability of this membrane to glucose, you increase the proportion of saturated phospholipids in the bilayer. What will happen to the membranes permeability to glucose? a. permeability to glucose will increase
b. permeability to glucose will decrease
c. permeability to glucose with stay the same
d. you cannot predict the outcome. You simply have to make the measurements.

2. Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. Which cellular organelle must be NONfunctioning in this condition?
a. the rough endoplasmic reticulum
b. the golgi apparatus
c. the lysosome
d. the mitochondrion

The answer is a because - is an direction

Proteins are the workhorses of the cell, controlling virtually every reaction within as well as providing structure and serving as signals to other cells. proteins are long chains of  amino acids  , and the exact sequence of the amino acids determines the final structure and function of the protein. instructions for that sequence are encoded in  genes  . to make a particular protein, a messenger ribonucleic acid (mrna) copy is made from the gene (in the process called  transcription  ), and the mrna is transported to the  ribosome  . protein synthesis, also called  translation  , begins when the two ribosomal subunits link onto the mrna. this step, called initiation, is followed by elongation, in which successive amino acids are added to the growing chain, brought in by transfer rnas (trnas). in this step, the ribosome reads the  nucleotides  of mrna three by three, in units called  codons  , and matches each to three nucleotides on the trna, called the anticodon. finally, during termination, the ribosome unbinds from the mrna, and the  amino acid  chain goes on to be processed and folded to make the final, functional protein