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- Glucagon is a peptide hormone consisting of 29 residues that are released into the blood. It works with insulin to regulate blood sugar levels, when blood sugar is low, glucagon is a signal to release glucose into the blood from glucose stored in long chains called glycogen. When blood sugar is high, insulin signals to cells to take in glucose and convert into glycogen. Glucagon is an inherently unstructured peptide that does not adopt any definitive fold until it interacts with the glucagon receptor. Based upon what you know about the structure of CBP’s NCBD region. Which of the following are true? Before binding the structure is at the middle of the protein-folding funnel. Before binding the structure is at the bottom of the protein-folding funnel. It exists as a molten globule B and C A and Cwhat does it mean to be lactose intolerant?is this an alpha or beta sugar? How can you tell?
- To be considered a transcription factor, a protein must bind the DNA. True or FalseTrue or false: A fully assembled 70S ribosome is recruited to the mRNA just 5 ́ of the translation start site?Which of the following organisms incorporates peptides along with carbohydrates in its cell wall structures? plants animals bacteria fungi
- Which of the following statements about the post-translation modification of proteins by phosphorylation are true? Check all that apply it is usually reversible it is an important mechanism for regulating enzyme activity it changes a hydroxyl group to a phosphate group it is a modification of the R groups of proline (P), isoleucine (I) and glycine (G) 18 2 # 3 $ 4 % 5 MacBook Pro 6 v Ro 8 9 0True or False: In eukaryotes, transcription is generally regulated by a combination of many factors which determines the expression of any given gene. False TrueTo visualize the spatial arrangement of amino acid residues in an a-helix, it is helpful to imagine you are looking down the long axis of the helix, just as you would look down a soda straw. Viewed in this orientation, the residues form a circle, with each residue offset from its neighbor by 100 degrees. This representation is called a helical wheel. Use the circle below to indicate the position of each residue around the helix of the enzyme lysozyme. NH ...Arg - Cys - Glu- Leu - Ala Ala - Ala Met-Lys COO- The first two amino acids, Arg-1 and Cys-2, are shown as an example. Arg-1 O Glu-3 Which amino acid in the polypeptide is the first to pass the origin (i.e., which amino acid passes Arg- 1 first, completing one full circle)? Select the best answer. O Leu-4 O Ala-5 O Ala-6 O Ala-7 Met-8 O Lys-9 100° O none of the above Cys-2
- A few simple sugars attached together.Most proteins have more leucine than histidine residues, but more histidine than tryptophan residues. Correlate the number of codons for these three amino acids with this information.S-adenosylmethionine is an activated carrier molecule that transfers which of the following groups? the carboxylic acid group (with one carbon) the phosphate group (with zero carbons) the glucose group (with six carbons) the methyl group (with one carbon) the acetyl group (with two carbons)