Alpha helices - Study guides, Class notes & Summaries

Honors Biology Semester 1 Final Study Guide with Complete Solutions How do plasmodesmata function in plant cell communication? Plasmodesmata are channels that connect plant cells, allowing the transfer of water, nutrients, and signaling molecules between them. What is the significance of operons in prokaryotic gene regulation? Operons allow prokaryotes to regulate the expression of genes by controlling the transcription of multiple genes simultaneously. How does the secondary str...

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...

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...

Biochemistry Study Guide Questions and Answers Rated A+ What unique feature of enzymes allows them to be highly specific for their substrates? The unique three-dimensional shape of an enzyme allows it to fit only specific substrates, much like a key in a lock. How does the structure of glycogen contribute to its function as an energy reserve? Glycogen's branched structure allows for rapid mobilization of glucose when energy is needed quickly. What is the significance of the ...

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...

MCMP 442 Exam 2 Questions and Answers 100% Pass Which is the most likely reason that HIV-infected people with heterozygous HLA loci have a delayed progression to AIDS compared with patients who are homozygous at one or more HLA loci? A. The greater number of HLA alleles provides a wider variety of HLA molecules for presenting HIV-derived peptides to CD8 T cells even if HIV mutates during the course of infection. B. Heterozygotes have more opportunity for interallelic conversion and can t...

Biology Major Field Test Study Set Rated A+ "4 Biomolecules and Monomers Protein (amino acids) Carbohydrates (simple sugars) Lipids (glycerol and fatty acids) Nuclei acids (nucleotides)" dipeptides two amino acids bonded together what is the general fatty acid formula CH3(CH2)nCOOH where n= an even number between 12 and 24 explain identifying saturated vs. unsaturated fats saturated: only single bonds in hydrocarbon chain... unsaturated: one or more double bonds glycerides...

MCMP 442 Exam 2 Questions and Answers 100% Pass Which is the most likely reason that HIV-infected people with heterozygous HLA loci have a delayed progression to AIDS compared with patients who are homozygous at one or more HLA loci? A. The greater number of HLA alleles provides a wider variety of HLA molecules for presenting HIV-derived peptides to CD8 T cells even if HIV mutates during the course of infection. B. Heterozygotes have more opportunity for interallelic conversion and can t...

BCHM 307 EXAM 1 QUESTIONS WITH ANSWERS Secondary structure - Answer-the local 3-dimensional structure of the peptide backbone - there are 4 major classes of secondary structure (alpha helix, beta sheet, turns, and random coil) The alpha helix of the secondary structure - Answer-the alpha helix is a helical region of the peptide backbone that is stabilized by hydrogen bonding - carbonyl residue of each amino acid residue is hydrogen bonded to the amide group 4 residues further toward the c...

BPK 110 Practice Exam Questions and Answers 2024/2025 | A+ GRADED 100% VERIFIED Differentiate between complete and incomplete proteins and provide typical sources of each. Complete proteins: Have all nine essential amino acids. Ex. Animal sources of protein (milk, meat) Incomplete proteins: Lack one or more of the essential amino acids. Ex. Plant sources of proteins (legumes) Describe the molecular structure of proteins and the four levels of protein structure. Which bonds are essential ...