Amino acid residues - Study guides, Class notes & Summaries

A _____ protein will often have properties that allow it to be both strong and flexible. A) macromolecular B) fibrous C) globular D) helical E) membrane - B) fibrous A D-amino acid would interrupt an a helix made of L-amino acids. Another naturally occurring hindrance to the formation of an a helix is the presence of: A) a negatively charged Arg residue. B) a nonpolar residue near the carboxyl terminus. C) a positively charged Lys residue. D) a Pro residue. E) two Ala residues side b...

Which of the following differentiates the biochemical standard state from the standard state when discussing standard free energy changes? correct answers pH of 7 If a typical person hydrolyzes 100.0 mol of ATP per day, how much does this ATP weigh? (The molecular weight of ATP is 507 g/mol.) correct answers 50.7 kg A reaction is always spontaneous if correct answers the change in free energy, ΔG, is negative. Which of the following is an example of a heterotroph? correct answers yeast...

Nucleic acids stain with ______ dyes which impart a ________ color. Therefore, nucleic acids are described as ______. A. Base-like; blue/purple; acidophilic B. Acid-like; red/pink/orange; basophilic C. Base-like; blue/purple; basophilic D. Acid-like; red/pink/orange; acidophilic - Answer-C. Base-like; blue/purple; basophilic Which molecules are lost from cells during the processing for H&E staining? a. Carbohydrates b. Proteins c. Lipids d. Nothing is lost - Answer-c. Lipids A slide-m...

Types of Proteins - ANSWER-o Cellular / nuclear o Integral membrane, membrane-anchored, membrane-attached o Extracellular / secreted Examples of proteins - ANSWER-Collagen, Hormones, Receptors - cell surface/nuclear, Enzymes, Transporters, Channels, Cytoskeleton, Motor proteins / transport, Antibodies, Neuropeptides, Transcription factors, Chaperones, Histones, Binding proteins primary protein structure - ANSWER-Linear sequence of amino acid residues joined through peptide bonds to form ...

Typical Van der Waals energies are about: correct answers 2-4 kJ/mol A possible drug to treat COVID-19 has been discovered and is known to be a weak acid. At the pH of blood (7.4) the concentrations of acid and conjugate base are 0.075 and 0.025 respectively. What is its pKa? correct answers 3.00 What is the [A-]/[HA] ratio whent he weak acid is in solution alone pH unit above its pKa? correct answers 10:1 What are the primary chemical components present in a phosphate buffer at pH 7.4?...

MCB EXAM 1 QUESTIONS & ANSWERS 2023/2024 How large is our genome? - ANSWER-3200 million bp How many base pairs does the genome contain? - ANSWER-3 × 10^9 base pairs. How long is the genome when fully extended? - ANSWER-20,000 phone books long What is Chromatin? - ANSWER-the fibrous complex of eukaryotic DNA and histone proteins. Which are the main Histones? - ANSWER-H1, H2A, H2B, H3, and H4. What's the charge (polarity) of Histones? - ANSWER-Positive What amino acid resi...

UNE medical biochemistry Unit 1 Test Questions & Answers 2024 Which of the following amino acid would not be commonly found in the middle of a an α-helical domain? - ANSWER-Proline. It is considered a 'helix breaker' and would not be found in an alpha helix; all other residues are nonpolar hydrophobic and could reside in a transmemebrane domain. Changes in the physiological variables listed below can alter the affinity of hemoglobin for oxygen. Which of the following will lower the...

ACS BIOCHEMISTRY EXAM QUESTION WITH COMPLETE SOLUTIONS LATEST 2024. Henderson-Hasselbach Equation - CORRECT ANSWER - pH = pKa + log ([A-] / [HA]) FMOC Chemical Synthesis - CORRECT ANSWER - Used in synthesis of a growing amino acid chain to a polystyrene bead. FMOC is used as a protecting group on the Nterminus. Salting Out (Purification) - CORRECT ANSWER - Changes soluble protein to solid precipitate. Protein precipitates when the charges on the protein match the charges in the solution....

(T/F) A biochemical reaction, without a catalyst or thermodynamic coupling, takes 50 years to reach a state of equilibrium. Without more information, we cannot make a determination on either the value of the Keq constant or the positive or negative value of the ΔG of the reaction. Correct Answer-False (T/F) Due to its small size, the amino acid glycine can be found in tight turns in a protein structure. Correct Answer-True (T/F) The ΔG of a reaction is defined as the energy required to b...

ochemistry 4th Edition by Donald Voet – Test Bank Sample Test Chapter 6: Proteins: Three-Dimensional Structure Matching For questions 1-10: A) tertiary structure B) keratin C) molecular chaperones D) hydropathy E) cis F) trans G) sterically forbidden conformation H) regular secondary structure I) collagen J) peptide bond K) ribonuclease A (RNase A) L) alpha 1. Repeating values of f and y make up predictable orientations of amino acid with a chain, this predictable orientation...