BIO 161 midterm 1 cal poly Latest Version 100% Pass

BIO 161 midterm 1 cal poly Latest Version 100% Pass Question 1: What are the fundamental elements found in the molecular structure of proteins? - a. oxygen, carbon, nitrogen, hydrogen, amino acid side chain - b. nitrogen, oxygen, carbon, hydrogen, amino acid backbone - c. nitrogen, hydrogen, carbon, oxygen, amino acid ring - d. hydrogen, oxygen, carbon, nitrogen, amino acid group - Answer: a. oxygen, carbon, nitrogen, hydrogen, amino acid side chain Explanation: Proteins are composed of oxygen, carbon, nitrogen, and hydrogen, along with unique side chains known as amino acid side chains. Question 2: What is the monomer unit and the polymer form of proteins? - a. amino acid (phenylalanine, leucine, serine); polypeptide - b. amino acid (glycine, valine, threonine); polysaccharide - c. glucose, fructose; triglyceride 2 - d. fatty acid, glycerol; phospholipid - Answer: a. amino acid (phenylalanine, leucine, serine); polypeptide Explanation: Amino acids are the monomers of proteins, and when linked together, they form polypeptides. Question 3: What does the primary structure of a protein refer to? - a. arrangement of amino acids - b. folding due to hydrogen bonds - c. interactions between R-groups - d. combination of multiple polypeptide chains - Answer: a. sequence of amino acids Explanation: The primary structure of a protein is the linear sequence of amino acids joined by peptide bonds. Question 4: How does the secondary structure of a protein form? 3 - a. formation of disulfide bonds - b. interactions between R-groups - c. hydrogen bonds along the backbone - d. combination of multiple polypeptide chains - Answer: c. hydrogen bonds form on backbone, alpha helix, beta-pleated sheets Explanation: The secondary structure of a protein arises from hydrogen bonds between amino acids, forming alpha helices or beta-pleated