WGU Biochemistry

DNA is a type of _____________ Correct Answer: nucleic acid __________ are found in virtually all cells Correct Answer: Nucleic acids What is the function of nucleic acids? Correct Answer: To encode heritable information and pass it on from generation to generation What three things make up nucleotides? Correct Answer: Phosphate, pentose sugar, and pyrimidine or purine base What are the four bases in DNA? Correct Answer: Adenine, guanine, cytosine, and thymine What are the fo...

DNA replication is ___________, which allows each of the two strands to serve as a _______ for the new strands. b. semiconservative, template Correct Answer: DNA replication is semiconservative, meaning that each new duplex has one original (parent) strand and one new strand. Because the two parent strands are separated during replication and the base pairing is predictable, each parent strand can serve as a template for the new strand synthesis. Which of the following enzymes does NOT as...

Which mRNA sequence results in a polypeptide that contains three amino acids? Correct Answer: 5' - CUU GAU ACU UAG - 3' Which template strand DNA sequence would result in the amino acid (Ser)? Correct Answer: 5' - CGA - 3' Pay attention. The TEMPLATE STRAND DNA is a 3'-5' so it's flipped. What is the complementary sequence for the following DNA sequence? 5' - GCC ATC TCG AAT - 3' Correct Answer: 5' - ATT CGA GAT GGC - 3' Assuming 100% reaction efficiency, how many D...

saturated fatty acid Correct Answer: A fatty acid that doesbt contain double bonds between carbons with the hydrocarbon chain Unsaturated fatty acid Correct Answer: A fatty acid with one or more double bonds within the hydrocarbon chain Phosphate group Correct Answer: Contains a phosphorus atom surrounded by four oxygens Essential fatty acid Correct Answer: Include Unsaturated fatty acids that contain and omega-3 and/or an omega 6 double bond. The acid portion of a fatty acid cor...

Enzymes have an ________ ________ which serves as the binding platform for its specific substrates and acts as the site of the chemical reaction. Correct Answer: Active Site A molecule similar in structure to a substrate that can bind to an enzymes active site even though the molecule is unable to react; can be overcome by adding additional substrate; Ifs there's too much substrate and not enough inhibition, the substrate will win. Correct Answer: Competitive Inhibitor Binds to the allo...

Which level of protein structure is disrupted through the hydrolysis of peptide bonds? Correct Answer: primary Secondary, tertiary, and quaternary levels of protein structure can all be impacted by exposing a protein to which treatment? Correct Answer: placement of the protein in a solution with a low pH An increase in beta-pleated sheet structure in some brain proteins can lead to an increase in amyloid deposit formation, characteristic of some neurodegenerative diseases. What is the pr...

Which level of protein structure is disrupted through the hydrolysis of peptide bonds? Correct Answer: Primary The primary structure of a protein is the sequence of amino acids held together by peptide bonds. How are peptide bonds formed? Correct Answer: Dehydration reactions What are the processes of Central Dogma? Correct Answer: Replication, Transcription and Translation A mutation in the DNA that changes the sequence of a codon but does NOT change the amino acid sequence of th...

hemoglobin has how many subunits that can bind heme to iron to oxygen? Correct Answer: 4 myoglobin has how many subunits? Correct Answer: 1 myoglobin vs hemoglobin: has higher affinity for oxygen? Correct Answer: myoglobin _______________ is more saturated with O2 in smaller amounts of O2 myoglobin vs hemoglobin Correct Answer: myoglobin. oxygen dissociation curve is more steep at first. when hgb is bound to oxygen, what shape is taken and color? Correct Answer: Relaxed stat...

Which property of enzymes is illustrated in the final step of the enzymatic cycle? A. Enzymes increase the reaction rate for a reaction. B. Enzymes lower the activation energy for a reaction. C. Enzymes are specific. D. Enzymes are reusable. Correct Answer: Enzymes are reusable. In the enzyme cycle, which step immediately follows induced fit? A. Formation of the enzyme-substrate complex B. Release of the product and enzyme complex C. Formation of the enzyme-molecule complex D. Format...

Replication, transcription and translation in this order. Correct Answer: The biological process depicting the central dogma of life. The Central dogma Correct Answer: The a process in which information is used to direct the synthesis of proteins that carry out the cell's activities. Genome Correct Answer: Organism's complete set of genetic information. coding strand, Correct Answer: The DNA strand whose base sequence corresponds to the base sequence of the RNA transcript produced...