BIOCHEM-ACHIEVE(FIRST DAY DISCOUNTED)
9th Edition
ISBN: 2818000069358
Author: BERG
Publisher: MAC HIGHER
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Chapter 6, Problem 6P
Interpretation Introduction
Interpretation:
An explanation corresponding to the fact that the three-dimensional structure of
Concept introduction:
Proteins are the biomolecules which are composed of the long chain of amino acid residues. The identical sequences or the primary structure in
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The three-dimensional structure of biomolecules is more conserved evolutionarily than is sequence. Why?
Long explanations are not needed. Answers and brief descriptions would be enough.
During the formation of the peptide bond which of the following takes place?
a. Hydrogen atom is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from the amino group of another amino acid.
b. Hydrogen atom is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from the amino group of another amino acid.
c. Hydroxyl group is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from the amino group of another amino acid.
d. Hydroxyl group is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from the amino group of another amino acid.
cotton. Which aspect of the structure of cellulose accounts for its strength?
Cellulose is an abundant structural polysaccharide found in plant cell walls, wood, and
interchain hydrogen bonding between extended molecular chains
repeating unit of N-acetylglucosamine
a(1→4) linkages between glucose units
branches that occur every 12-30 residues
forms a helical conformation in water
Which of the following is not correct about chitin?
fundamental constituent of the exoskeletons of crustaceans, insects, and spiders
b)
chitin chains form extended ribbons that pack side-by side
a)
similar to cellulose but with repeating units of N-acetyl-D-glucosamine
c)
d)
found mainly in the liver in humans, making up as much as 10% of liver mass
stacked sheets of chitin strands are stabilized by intrastrand, interstrand, and
intersheet hydrogen bonds
Chapter 6 Solutions
BIOCHEM-ACHIEVE(FIRST DAY DISCOUNTED)
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- This is DNA. Locate the nitrogen bases (nitrogens are blue). Where are they located in the molecule?Locate the sugars and phosphates, and describe their location. Adjacent nucleotides are linked by covalent phosphodiester bonds (-O-P-O-) produced by a condensation reaction. What parts of the adjacent nucleotides are linked by phosphodiester bonds?Two nitrogenous bases extending towards the middle of the double helix. Are there any covalent bonds between these bases?If there are no covalent bonds between these bases, what other kinds of bonds might hold the two strands of the double helix together?arrow_forwardA peptide bond... is a version of an ester bond is a version of an amide bond is the basis of protein secondary structure is formed by addition of waterarrow_forwardProteins are quite stable. The lifetime of a peptide bond in aqueous solution is nearly 1000 years. However, the free energy of hydrolysis of proteins is negative and quite large. How can you account for the stability of the peptide bond in light of the fact that hydrolysis releases much energy?arrow_forward
- Draw any pentapeptide. All C-O, C-N, and C-S bonds must be written out, as well as all N-H, S-H, and O-H atoms/bonds. Your peptide must include at least one amino acid from each of the major classes of amino acids (i.e. charged, polar, etc.). Circle each peptide bond in this peptide.arrow_forwardAlpha-helix of proteins, its characteristics. Draw a diagram of the arrangement of amino acids in the alpha helix. Examples of proteins formed mainly by this structure.arrow_forwardNeed help. Which one of the following statements is FALSE? Group of answer choices A.Beta-pleated sheets are part of the secondary structure of proteins B.The nitrogenous bases of DNA are located on the inside because they are hydrophobic in character C.The peptide bond is formed by dehydration synthesis D.Alpha helices are stabilized by attraction between the amino acid R groups E.The peptide bond is rigid and planar and has partial double bond characterarrow_forward
- Fill in the blanks. The parentheses are the choices for the blank. Fatty acids and nucleotides are examples of molecular subunits called ______ (monomers, polymers). Complex molecules such as proteins or nucleic acids formed from these repeated molecular subunits are called _______ (monomers, polymers).arrow_forwardShape and dimension. (a) Tropomyosin, a 70-kDa muscle protein, is a two-stranded α-helical coiled coil. Estimate the length of the molecule. (b) Suppose that a 40-residue segment of a protein folds into a two-stranded antiparallel β structure with a 4-residue hairpin turn. What is the longest dimension of this motif?arrow_forwardPlease help me with this question. More than one answer may be correct. Elastin _______. Options: A) has a repeating structure of 3 amino acids such as Gly-Pro-X B) crosslinks with numerous other elastin peptides to make an elastic fiber C) is physically attached to the smooth endoplasmic reticulum D) is physically attached to ribosomes E) is rich in hydrophobic residuesarrow_forward
- PART A. Redraw the table below on the whiteboard. Use your Biological Molecules Part 2 handout to fill in the missing information in Column B and C. A) Polymer Lipid DNA B) Monomer (or component units in the case of lipids). Draw the specific structure and put the name of the molecule under the structure. Fatty acids (pick 1), glycerol, glycerophospholipid Deoxynucleotide monophosphates (Pick one purine and one pyrimidine) C) Additional tasks Is your fatty acid saturated or unsaturated? How do you know? On your glycerophospholipid, identify the glycerol group, the fatty acids, and the phosphocholine. Label the hydrophilic head and hydrophobic tail. Label which is the purine and which is the pyrimidine. Circle the sugar on each.arrow_forwardHello, please help me with my assignment. Can you answer ALL QUESTIONS EXCEPT QUESTIONS 1-31. Which of the following statements is accurate regarding these protein structures?a. Proteins in a quaternary structure consist of a simple polypeptide chain.b. Interactions between the R groups in amino acids form tertiary structure.c. Secondary structures are formed by multiple polypeptide chains.d. The two types of primary structure are α- helices and β- pleated sheets. 2. What type of bonds are formed between amino acids?a. Peptide bondb. Glycosidic linkagec. Hydrogen bondsd. Ester linkages 3. Which of the following is an example of protein denaturation?a. Amino acids fold into repeating patterns due to hydrogen bonding of the peptide backbone.b. Several amino acids are joined together via peptide bonds.c. A protein binds with a substrate, lowering the activation energy of a reaction.d. A protein is exposed to extremely high heat, causing it to lose its secondary structure and be leftwith…arrow_forwardSelect all that apply. The primary structure of a protein: is determined using NMR methods. can be determined as long as the peptide is not broken or denatured. is determined by cleaving the protein into smaller peptides. is its sequence of amino acids. is determined by combining overlapping peptide segments to obtain the sequence of the entire protein.arrow_forward
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