Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Chapter 1, Problem 4RQ
Summary Introduction
To review:
Definition of the following biological terminologies:
(a) polypeptide
(b) peptide
(c) protein
(d) peptide bond
(e) standard amino acids
Introduction:
Amino acids are classified as the organic compounds that have two
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A posttranslational modification that directs a polypeptide toa specific site is called a _____________________modification.
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A posttranslational modification that directs a polypeptide to a specific location is called a _____________ modification.
Chapter 1 Solutions
Biochemistry: The Molecular Basis of Life
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- Question 25 Calculate the net charges of the following peptides at pH 7.4. Indicate which amino acids bear chuarged side chans a) NH2-Asp-Leu-Phe-Ala-Lys-Pro-Glu-Gly-COOH b) NH2-GIn-Glu-Lys-Tyr-Trp-Arg-Ala-Leu-COOH DELLarrow_forwardThe amide linkages of proteins are referred to as________________________.arrow_forwardThe _____________ is an explanation for why there are fewer tRNAs than expected in living cells.arrow_forward
- a) From the chemical structure above, write the amino acid sequence using both three-letter and one-letter abbreviations. Disregard chirality for this question. b) Indicate adjacent to the alpha-carbon of each residue whether it has an L- or D-configuration.arrow_forwardWhen a purine or pyrimidine is linked through a b-Nglycosidic link to C-1 of a pentose, the molecule is calleda _________________________.arrow_forwardThe _____________ is the term used for polypeptide destruction motifs.arrow_forward
- _____________ are macromolecules with no fixed molecular weights.arrow_forwardWhen a purine or a pyrimidine is linked through a β-N-glycosidic link to C-1 of a pentose, the molecule is called a _____________ .arrow_forwardThe process of continuous synthesis and degradation of protein is referred to as _____________.arrow_forward
- Bacterial phospholipids are hydrophobic due to fatty acids, while archaeal phospholipids are hydrophobic due to ______________________________.arrow_forwardQuestion 4. Imagine the main chain of a protein bends back on itself so that two amino acid residues R1 and R2 come close to each other. In the table below are four possibilities for what R1 and R2 might be. In each case, decide whether a specific interaction could form between the residues. If a specific interaction could form, give the name of the interaction. R₁ cysteine tyrosine threonine arginine R₂ cysteine phenylalanine glutamine aspartate specific interaction? OO yes O yes O no no OO O yes no yes no name of specific interaction 0 П 0 0arrow_forwardWithin ____________ are instructions for how to make proteins in a cell.arrow_forward
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