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Question 1

Question 1. Which of the following biological molecules contain peptide bonds? Proteins Carbohydrates Lipids Nucleic Acids. Question 2. What is the function of chaperonin proteins? Denaturation of polypeptides Assembling amino acids Regulation of gene expression Folding proteins

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Question 1

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  1. Question 1 Which of the following biological molecules contain peptide bonds? Proteins Carbohydrates Lipids Nucleic Acids

  2. Question 2 What is the function of chaperonin proteins? Denaturation of polypeptides Assembling amino acids Regulation of gene expression Folding proteins None of the above

  3. Question 3 Which amino acid is responsible for the formation of disulfide bonds? Alanine Proline Tyrosine Cysteine Guanine

  4. Question 4 The addition of water to break a chemical bond is termed – Dehydration synthesis Hydrolysis Condensation Catabolism Disassociation

  5. Question 5 Which lipid forms membranes? Triglycerides Steroids Phospholipids Terpenes Saturated fates

  6. Question 6 Which of the following is not a function of proteins? Coding for polypeptides Catalyzes chemical reactions Transport of material Structural components of tissues All of the above are protein functions

  7. Question 7 The 2 strands of DNA are covalently bonded together. These bonds are called phosphodiester bonds. This is true This is false

  8. Question 8 Which of the following is not part of a nucleotide? 5 carbon sugar Phosphate group Fatty acid chain Nitrogenous base

  9. Question 9 The energy in lipids is stored in the C-H bonds. This is true This is false

  10. Question 10 Which of the following is an amino group? -OH -C=O -COOH -SH -NH2

  11. Question 11 Dehydration synthesis – Is used to link monomers Removes water to form bonds Is involved in protein synthesis Can form disaccharides All of the above

  12. Question 12 Lincosamides are a class of antibiotics that inhibit peptide bond formation. What type of biological molecule would be affected? Lipids Proteins Nucleic Acids Carbohydrates

  13. Question 13 If a chromosome contains 20% thymine, how much guanine should it have? 10% 20% 30% 40%

  14. Question 14 A person is lactose intolerant. What type of molecule is lactose? Monosaccharide Disaccharide Oligosaccharide Polysaccharide

  15. Question 15 The alpha-toxin produced by the bacterium that cause gas gangrene is a phospholipidase enzyme. How does this toxin kill cells? Disruption of protein synthesis Prevention of DNA replication Breaking down the plasma membrane Blocking nutrient absorption Stopping biochemical pathways

  16. Question 16 What happens when a lipid is hydrogenated? Hydrogen is added to the fatty acid chains The melting point is raised The lipid is converted into a saturated fat The fatty acid chain is straightened All of the above

  17. Question 17 You worked at a fish hatchery and wanted to set up an experiment to deliver the female sex hormone, estrogen, to some fish. What type of molecule is estrogen? Triglyceride Polypeptide Steroid Terpene Disaccharide

  18. Question 18 If a strand of DNA has a sequence 5’-ATCCTAG-3’, what would be the complementary sequence? 5’-CGAAGAT-3’ 5’-TAGGATC-3’ 3’-TAGGATC-5’ 3’-CGAAGTC-5’

  19. Question 19 If a cell was grown in a growth medium that has a radioactive sulfur isotope which class of biomolecules will show the presence of the isotope? Nucleic acids Carbohydrates Lipids Proteins

  20. Answer Key A D D B C A B (False) C A (True) E E B C B C E C C D

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