Download Amino Acids and Proteins: Structure and Function - Prof. Grant E. Gardner and more Quizzes Biology in PDF only on Docsity! Question 1 Which one of the following is not a molecular component of a general amino acid monomer used to make proteins? Answer Selected Answer: a phosphorus atom, P Correct Answer: a phosphorus atom, P Question 2 What aspects of amino acid structure vary among different amino acids? Answer Selected Answer: the atomic components of the R- group Correct Answer: the atomic components of the R- group Question 3 Suppose you discovered a new amino acid. Its R-group contains only hydrogen and carbon atoms. Predict the chemical behavior of this amino acid. Answer Selected Answer: It is hydrophobic. Correct Answer: It is hydrophobic. Question 4 You place a protein in a solution that disrupts all hydrogen bonds in a protein. What level of structure will be preserved? (in other words, what level of organization will remain in your protein?) Answer Selected Answer: Primary structure Correct Answer: Primary structure Question 5 In Figure B3.1 in your textbook, node "A" represents __________ and node "D" represents. Answer Selected Answer: The common ancestor of all the shown taxa; the common ancestors of taxon 2 and 3 Correct Answer: The common ancestor of all the shown taxa; the common ancestors of taxon 2 and 3 Question 6 In reference to Figure B3.3 in your textbook, all of the phylogenetic trees are showing the same relationship between taxa except: Answer Selected Answer: Tree "d" Correct Answer: Tree "d" Question 7 Current understanding of the evolutionary relationships among organisms _____. Answer Selected Answer: may change, as more species are discovered and studied Correct Answer: may change, as more species are discovered and studied Selected Answer: Eukaryotic cells tend to have much more extensive inner membrane systems and larger numbers of intracellular organelles than do prokaryotes. Correct Answer: Eukaryotic cells tend to have much more extensive inner membrane systems and larger numbers of intracellular organelles than do prokaryotes. Question 16 How does the structure of an amino acid enable it to play its most important roles in cells? Answer Selected Answer: The presence of carboxyl and amino groups gives it the ability to form chemically stable peptide bonds, and its R-groups gives it unique chemical properties. Correct Answer: The presence of carboxyl and amino groups gives it the ability to form chemically stable peptide bonds, and its R-groups gives it unique chemical properties. Question 17 Which one of the following would you fail to find in a common prokaryote? Answer Selected Answer: a mitochondrio n Correct Answer: a mitochondrio n Question 18 In comparison to eukaryotes, prokaryotes _____. Answer Selected Answer: are typically smaller Correct Answer: are typically smaller Question 19 The small intestine is the site of digestion and absorption of nutrients in humans. A single layer of epithelial cells lines the small intestine. In the duodenum (the first section of the small intestine), these epithelial cells secrete large quantities of digestive enzymes (a functional protein) into the digestive tract. Which of the following features would you expect to find in these epithelial cells? Answer Selected Answer: They would contain large quantities of rough endoplasmic reticulum. Correct Answer: They would contain large quantities of rough endoplasmic reticulum. Question 20 Why did the five-kingdom system of classification fall out of favor? Answer Selected Answer: It did not reflect the actual evolutionary relationships among organisms very well Correct Answer: It did not reflect the actual evolutionary relationships among organisms very well
