13) Which bond in the image above is a peptide bond? A. A B. B c, c D. D E. E 14
ID: 258069 • Letter: 1
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13) Which bond in the image above is a peptide bond? A. A B. B c, c D. D E. E 14) Glycogen is a(n): A. monosaccharide. B. structural polysaccharide in plants. C. storage polysaccharide in plants. D. structural polysaccharide in animals. E. storage polysaccharide in animals. 15) Which of the following statements is true? A. RNA is usually composed of two nucleotide strands. B. Ribose is the sugar in RNA C. Thymine is one of the RNA nucleotides. D. An RNA polynucleotide is held together by hydrogen bonds. E. RNA does not contain nitrogen. 16) A molecule with the chemical formula C1oHisO is probably a: A. monosaccharide B. disaccharide C. amino acid D. protein E. nucleic acid 17) Which type of lipid would you expect to find in butter? A. wax B. steroids C. saturated triglycerides D. unsaturated triglycerides E. phospholipids 18) The secondary structure of proteins is described as the: A. association of two or more polypeptide chains by weak bonds. B. folding of a peptide chain to form an alpha helix. C. bonding of two amino acids to form a dipeptide. D. three-dimensional shape of an individual polypeptide chain. E. order in which amino acids are joined in a peptide chain.Explanation / Answer
Ans 13) C:
Peptide bond is the bond joining the carboxyl group of one molecule with the amino group of the other molecule.
Ans 14) E:
Glycogen is a polysaccharide and a form of energy stored in the human and animal body.
Ans 15) B:
RNA contains ribose sugar and DNA deoxyribose sugar.
Ans 16) B:
HOCH2(CH(OH))3CHO C5H10O5 is a xylose molecule. Two such molecules, with the elimination of a water molecule, will form a disaccharide called xylabiose - C10H18O9.
Ans 17) C:
Butter contains saturated fats, specifically saturated triglycerides.
Ans 18) B:
Alpha helices caused by interaction of hydrogen bonding between adjacent molecules of amino acids are referred to as secondary structure of protein.
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