Bio 181 ASU Capco Exam With Answers Graded A+

Amino Acids can be largely subdivided into two groups. What are the two groups? correct answer: hydrophilic and hydrophobic. Hydrophilic amino acids can be subdivided into basic, acidic, and neutral. Basic amino acids contribute a positive charge to the protein whereas acidic residues provide a negative charge. Neutral polar residues have side chains that are capable of forming hydrogen bonds. Hydrophobic amino acids may be subdivided into that are aliphatic and those containing aromatic rings. Amino acids contain aromatic rings are largely structural in function except for tyrosine which has a hydroxyl group. Cholesterol is _______ to have in biological membranes - correct answer: Good for a protein to enter the endoplasmic reticulum as part of the endoplasmic reticulum's lumen or part of the endoplasmic reticulum's membrane: - correct answer: A ribosome binds to mRNA and a short stretch of protein is synthesized that contains a signal sequence True or False: Facilitated diffusion uses a channel protein to let components move down their concentration gradient - correct answer: True What is the difference between a triglyceride and phospholipid? - correct answers: A triglyceride contains three fatty acids attached to glycerol backbone, while a phospholipid has two fatty acids plus a phosphate group attached to the glycerol True or False: Active transport uses ATP to move components in parallel with their concentration gradient, that is from a high concentration to a low concentration - correct answer: False What are the orphaned organelles orphaned from? - correct answers: endomembrane system True or False: It is a simple matter for a vesicle to form from the endoplasmic reticulum - correct answer: False Explain the evolutionary origin of mitochondria - correct answer: It is thought that a primitive proto-eukaryote engulfed a primitive proto-prokaryote good at making ATP and this organism lived inside this larger cell and began making ATP for the cell(endosymbiosis theory) True or False: A single pass trans-membrane protein that is an alpha helix can make a channel - correct answers: False