Alpha helices Study guides, Class notes & Summaries

You're using anion exchange chromatography to purify a small globular protein. After passing the mixture through the column, you find that your protein did not "stick" to the resin and flowed right through. What is a plausible reason for this to have occurred? Correct Answer-The pH of the solution is close to the isoelectric point. Oxygen binding that affects the cooperatively of hemoglobin is an example of heterotrophic regulation. Correct Answer-False You have determined that a leucin...

Which of the following amino acid would not be commonly found in the middle of a an α-helical domain? - 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 affinity of hemoglobin for oxygen? a) decrease in protons b) increase in...

Entrance Exam Semmelweis 2024/2025 Questions with Complete Solutions Electron configuration for cations - Correct Answer Subtract 1 from exponent of highest n-value orbital (ex. remove from 4s before 3d) Ag+ = [Kr]5s^1 4d^9 Electron configuration for anions - Correct Answer Add 1 to closest orbital Cl- = [Ne]3s^2 3p^6 Atomic orbitals - Correct Answer s, p, d, f Primary vs secondary structures of proteins - Correct Answer Primary - AA chain (linked by peptide bonds) Secondary -...

Semmelweis Entrance Exam Questions and Answers Already Passed Electron configuration for cations Subtract 1 from exponent of highest n-value orbital (ex. remove from 4s before 3d) Ag+ = [Kr]5s^1 4d^9 Electron configuration for anions Add 1 to closest orbital Cl- = [Ne]3s^2 3p^6 Atomic orbitals s, p, d, f Primary vs secondary structures of proteins Primary - AA chain (linked by peptide bonds) Secondary - stabilized by non-covalent bonds (alpha helices & beta sheets) Mo...

DNA that encodes information for proteins is within the ________ - nucleus What makes up the transcription complex that transcribes DNA? - Polymerases and transcription factors Transcriptional complexes transcribe DNA into _______ - mRNA ________________ machinery reads mRNA after it has been shuttled into the cytoplasm - translational Where are ribosomes formed? - nucleus ______________ make up the translational machinery that reads mRNA - Ribosomes The amino acid chain that forms the p...

CMM 577 EXAM 2 2024 WITH 100% CORRECT ANSWERSWhat are the three different cytoskeletal elements? Describe them. - correct answer Actin: Responsible for cell protrusions Concentrated at the cell cortex Organize into bundles/networks Microtubules: Long, larger, Made of tubulin Give rise to cilia, mitotic spindles and interphase array Intermediate Filaments: Ropelike fibers made of IF proteins Mechanical strength and support for the entire cell and nuclear lamina Describe the classifi...

UNE Medical Biochemistry Midterm Already Graded A Which of the following proteins is likely to have quaternary structure? A multimeric protein that contains multiple peptide chains Prosthetic groups are complex nonprotein molecules that participate in catalysis by providing functional groups that form a covalent intermediate between the enzyme and the substrate. Which of the following is an example of a coenzyme or cofactor that participates in a covalent catalysis reaction? Pyridoxal phosphate...

If a thin lens with an index of 1.5 has a dioptric power of +4.00 in air, what is its power if placed in water? A) +1.18 diopters B) +11.76 diopters C) +1.36 diopters D) +4.00 diopters - Answer- C) +1.36 diopters Alpha helices and beta sheets are considered which level of protein structure? A) Quaternary B) Primary C) Tertiary D) Secondary - Answer- D) Secondary An amphipathic molecule will react in what manner when exposed to water? A) It will completely dissolve B) It wi...

How do most enzymes reduce the activation energy needed to move a reaction forward? correct answer: Providing an active site most complementary the transition state An enzyme has a mutation within the substrate binding of the coenzyme needed for covalent catalysis. Which of the following is likely to result as a consequence of this mutation? correct answer: The enzyme will not be able to form the transition state complex Hemoglobin has the ability to display cooperative binding while myo...

Electron configuration for cations - Answer-Subtract 1 from exponent of highest n-value orbital (ex. remove from 4s before 3d) Ag+ = [Kr]5s^1 4d^9 Electron configuration for anions - Answer-Add 1 to closest orbital Cl- = [Ne]3s^2 3p^6 Atomic orbitals - Answer-s, p, d, f Primary vs secondary structures of proteins - Answer-Primary - AA chain (linked by peptide bonds) Secondary - stabilized by non-covalent bonds (alpha helices & beta sheets) Most bonds in organic compounds are - Answer-cov...