BIO 334 exam 1 Questions and Answers Latest Update

BIO 334 exam 1 Questions and Answers Latest Update What is considered a domain of life? - Answers Archeae How many micrometers are in a centimeter? - Answers 10,000 What is the correct order for the path light takes in a microscope from the light source to the observers eye? - Answers condenser lens-> specimen->objective lens->ocular lens A phase contrast microscope produces greater contrast of cells and organelles compared to bright-field microscopes. This is accomplished by... - Answers Destructive interference of light waves that have passed through specimen with those that have not How are the electron waves of the light microscope focused? - Answers Magnetic coils Which organism would be suitable for the study of photosynthesis? - Answers Arabidopsis thaliana The type of reaction used to break down both polysaccharides and polypeptides is called a reaction? - Answers hydrolysis What type of bond is most weakened in the presence of a polar solvent? - Answers ionic What organic molecule is involved in distinguishing ABO blood groups? - Answers carbohydrates What are the functions of RNA? - Answers store genetic information catalysis protein synthesis gene regulation Disulfide bonds are most likely to play a role in a protein's.... - Answers tertiary structure alpha helices maintain their helical structure by... - Answers hydrogen bonds between chemical groups of the peptide backbone What fibrous protein is the primary component of tendons and ligaments? - Answers collagen What is the best technique for determining 3-D structure of a protein? - Answers x-ray crystallography What is the best technique to determine molecular weight of a protein? - Answers SDS-PAGE The quaternary structure of a protein refers to... - Answers The arrangement of separate protein subunits Using all 20 amino acids, what is the number of possibly proteins 300 amino acids in length? - Answers 20^300 What indicates that a reaction can occur spontaneously? - Answers -delta G What IS true about isoelectric focusing? - Answers proteins are resolved based on their amino acid composition at very high/low pH, all proteins will have negative or positive charge proteins are resolved by exposure to an electric field in a gel with a stable pH gradient proteins cease migrating when the reach isoelectric point What is least abundant in human genome? - Answers exons Which mechanism of repairing DNA double-strand breaks with few or no errors? - Answers homologous recombination Which scientists proposed that all life is composed of cells? - Answers Schleiden and Schwann The reason 0X174 doesn't obey Chargaff's rule is because... - Answers 0X174 has a single stranded DNA genome What is the correct order of a carbon atom from most reduced to most oxidized? - Answers CH4, COH4, COH2, CO2H, CO2 Highly condensed regions of chromosomes containing few or no genes are referred to as... - Answers heterochromatin what is -CH3 C=O -NH3 PO4^2- -OH COOH - Answers methyl carbonyl amino phosphate hydroxyl carboxyl The two most common examples of protein 2 degree structure - Answers alpha helix, beta sheet When bacteria grow under conditions with antibiotics, most cells grow slowly and proliferate