5. Which of the following names best describes the molecule? CH2OH C=0 но- H- H- -OH ČH,OH A. Pentose В. а-anomer C. B-anomer D. L-sugar E. ketose

3) Which of the following is used to precipitate the nucleic acids Select one O a. Ethanol O b. Glycerol O c. Methanol O d. Ethylene

Which of the following names best describes the molecule? A. Pentose   B. α-glucose   C. β-fructose   D. L-sugar   E. ketose

5. Which class or reactions results in the making of all macromolecules: a) dehydration synthesis of monomersà polymers with the loss of an H2O with the addition of each monomer b) hydrolysis with the addition of one H2O for each reaction c) oxidation with the loss of an e- d) reduction with the gain of an e-

Penicillin G is a natural antibiotic that is useful for treating infections caused by Gram positive bacteria. What is the functional benefit of the semi-synthetic antimicrobials carbenicillin and ampicillin, generated by chemical modification of the R group so their R groups each are a bit different than the R group seen with penicillin G?

13. Which statement(s) correctly describe this disaccharide? CH2OH CH2OH A. It's the alpha anomer, and it's a reducing sugar. CH-O CH-O OH B. It's the alpha anomer, and it's a nonreducing sugar. CH CH CH CH OH C. It's the beta anomer, and it's a reducing sugar. ОН СН—СH CH-CH D. It's the beta anomer, and it's a nonreducing sugar. OH OH OH

CH2OH CH2OH 12. What type of linkage is found in this carbohydrate? CH-O CH—0 Н A. a-1,4 В. В-1,4 CH OH CH CH С. а-1,6 D. B-1,6 ОН СН—СН CH-CH CH2OH ОН E. None of these is correct.

Follow instructions

1. At pH 7, the net charge of lysine is A. -2 В. -1 С. О D. +1 Е. +2 2. All 20 amino acids have A. one chiral carbon В. one a-carbon C. one carboxyl group D. ionizable R group E. neutral charge at physiological pH 3. The a helix structure of a polypeptide is maintained by A. peptide bonds B. van der Waal's force C. hydrogen bonds D. ionic bonds E. disulphide bonds 4. Which side chain of the following amino acid is deprotonated at pH 9? A. Methionine B. Alanine C. Isoleucine D. Histidine Е. Тyгosine 5. How many chiral carbons are in the following sugar? А. 1 В. 2 С. 3 D. 4 Е. 5

Below is the structure of butyl alcohol. Based on the results of the experiment you just performed, predict the results of exposing beetroot cells to butyl alcohol. Explain your answer. H. H C-C-C- OH H H. H. Butyl Alcohol CIH HIC-