Biology quiz assessment

4) Paxlovid is treatment for COVID-19 that was recently approved for use because it can drastically reduce the risk for hospitalization and death when taken early in the infection. It is actually a package of two different antiviral drugs. One of those is Nirmatrelvir, which is a modified tripeptide protein mimetic designed to covalently bind to and inhibit the main protease (MPro) from the SARS-CoV-2 virus. This protease recognizes and hydrolyzes peptide bonds at specific points in their sequence, and it is essential for viral replication. a. Below is one of the sequences that Mpro recognizes and cleaves. It cleaves the peptide bond between the glutamine and the glycine. Draw out the structure of a peptide with this sequence, including the appropriate stereochemistry for biological amino acids and assuming the peptide is at physiological pH (pH = 7.4). SGVTFQGKF b. What would the net charge of the peptide be at physiological pH?. c. At what pH would the peptide be net neutral?

Q23: Dr. Alghe has just performed a restriction digest on DNA she extracted from her samples. She must now run her DNA out on a gel to separate the fragments based on size. To do this she must prepare a 1.1% agarose gel, where the percentage is determined as mass/vol. How many grams of agarose must she add to 413 mL of buffer in order to arrive at the correct percentage? (answer to 2 decimals) **Assume the dissolution of agarose will not alter the final volume of the solution**

One strand of DNA has the base sequence: C G A T T G G C A G T C A T. Determine the sequence of bases in the complementary strand of mRNA that would form next to this DNA strand.

Attenuation of the trp operon functions by controlling                                         .     A. translational termination   B. transcriptional initiation   C. transcriptional termination   D. translational initiation

The interaction of many different protein factors to stimulate or repress transcription forms a complex called: combinatorial control synergy ALL OF THESE mediator. NONE OF THESE

The coding (sense) strands of two complete (double-stranded) DNA molecules have the base sequences shown in the table below. Two replication experiments are done with each molecule: 1. In Experiment #1, samples of each DNA molecule are incubated with radioactive thymine, along with appropriate replication enzymes, ATP, adenine, thymine, and cytosine. Experiment #1 is stopped when each DNA molecule has replicated once. 2. In Experiment #2, all the DNA molecules from #1 are purified, and then incubated with again with the same reaction mixture. Experiment #2 is stopped when each DNA molecule has replicated one more time. Predict the percentage of DNA in each sample that radioactive after each experiment. Round your answers to the nearest percent. onesty sponse al offers DNA coding strand sequence 5-GAAGCGACCT-3' 5'-CCCCCCGGGC-3' Explanation Check 10 # 80 % of DNA radioactive after ... Experiment #2 0% 0% Experiment #1 0% 0% U 8 K X © 2023 McGraw Hill LLC. All Rights Reserved. Terms of…

The enzyme chymotrypsin catalyzes the hydrolysis of a peptide containing phenylalanine. Using the data below at a given temperature, calculate the maximum rate of the reaction, Rate Enzyme catalysis follows the Michaelis-Menten model. Rate Peptide Concentration (mol/L) 2.5 x 10-4 5.0 x 10 10,0 x 104 15.0 x 10 Submit Answer Reaction Rate (mol/L. min) 2.4 x 10⁰ 4.3 x 10- 7.4 x 10- 9.6 x 10-6 mol/L min Try Another Version tam attempts remaining

5:20 KB/s. 84% ← Seatwork 3-Nucleic acids.pdf Seatwork 3: Nucleotides and Nucleic acids A segment of DNA has the following sequence of bases ......5'-ATGCAATGATATTGAAGCTTA-3'...... a.) what sequence of bases would appear in mRNA transcribed from this segment b.) assume that the first base in this mRNA is the beginning of a codon. What order of amino acids would be translated into a polypeptide synthesized along this segment? c.) give anticodons for each tRNA associated with the translation in part (b) 」 о vo = III

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The template (antisense) strands of two complete (double-stranded) DNA molecules have the base sequences shown in the table below. Two replication experiments are done with each molecule: 1. In Experiment #1, samples of each DNA molecule are incubated with radioactive cytosine, along with appropriate replication enzymes, ATP, adenine, thymine, and cytosine. Experiment #1 is stopped when each DNA molecule has replicated once. 2. In Experiment #2, all the DNA molecules from #1 are purified, and then incubated with again with the same reaction mixture. Experiment #2 is stopped when each DNA molecule has replicated one more time. Predict the percentage of DNA in each sample that is radioactive after each experiment. Round your answers to the nearest percent. DNA template strand sequence % of DNA radioactive after... Experiment #1 3'-CATAATTT-5' 0% 3'-GGTC GAAG-5' 0% Experiment #2 0% 0%

Marie: The cell lines produce recombinant FIX and other proteins. Which biomolecule can specifically detect the presence of a certain protein, such as recombinant FIX, in a sample full of other proteins? a) Androgens b) Antigens c) Immunoglobulins d) Integrins

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