Homework Answers
Phosphorylation generally happens on threonine (Thr), Serine (Ser), tyrosine (Tyr) and histidine (His) residues within eukaryotic proteins. And these are present in the side chains. SO the correct answer is Met i.e. D
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quaternary structure. d. This kinetic plot implies that compound "Y" is an activator of this...
Explain the basis for the following statement: As a coenzyme, pyridoxal phosphate is covalently bound to...
Explain the basis for the following statement: As a coenzyme, pyridoxal phosphate is covalently bound to enzymes with which it functions, yet during catalysis the coenzyme is not covalently bound. Match the words in the left column to the appropriate blanks in the sentences on the right. Reset Help e-amino carboxylic acid PLP forms a covalent between the carbon of the coenzyme and an group of a lysine residue in the active site of the enzyme. This bond must be...
1 2 3 4 5 6 7 8 9 Part A Which of the following is/are...
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Part A Which of the following is/are means whereby a catalyst can lower the activation energy of a reaction? quantum tunneling decreasing the number of reactive molecules permanently binding substrates inefficient collisions altering the temperature within the cell to one appropriate for reactions to proceed Subrnit Request Answer Part A An enzyme Obinds substrates in a manner that facilitates the formation of product decreases the rate of a reaction. is always...
What is the correct answer? Please explain. Consider the kinetic plot of an enzyme catalyzed reaction...
What is the correct answer? Please explain.
Consider the kinetic plot of an enzyme catalyzed reaction to the right. Which of the following is not correct concerning the this enzyme? a. Compound stabilizes the ''R state'' of this enzyme. This enzyme exhibits ''cooperative binding'' of the substrate. This enzyme is probably composed of multiple catalytic and regulatory subunits. d. This enzyme is composed of a single polypeptide chain with one one binding site for substrate. Compound binds to a regulatory...
3. It is uncommon for one molecule to act as both an activator and inhibitor in...
3. It is uncommon for one molecule to act as both an activator and inhibitor in metabolism. Which of the following molecules both activates glycolysis and inhibits gluconeogenesis? A. NAD B. Fructose 1,6-bisphosphate C. Pyruvate D. Fructose 2,6-bisphosphate E. Glucose 6-phosphate 4. Regulation of phosphorylase is by phosphorylation. However, this covalent modification increases or decreases activity without completely inhibiting it. The velocity plot is sigmoidal. What statement can be made about this enzyme? A. It likely follows a Michaelis-Menten kinetic....
12. Which of the following statements is true of enzyme catalysts? A B C To be...
12. Which of the following statements is true of enzyme catalysts? A B C To be effective, they must be present at the same concentration as their substrate. They can increase the equilibrium constant for a given reaction by a thousand-fold or more. They lower the activation energy for conversion of substrate to product. Their catalytic activity is independent of pH. They are generally equally active on D and L isomers of a given substrate. D E 13. In competitive...
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d....
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d. lactic acidemia e. pellagra syrup urine disease b, phenylketonuria c. galactosemia 10. Chemical modification by phosphorylation of pyruvate dehydros a. deactivates the enzyme b. activates the enzyme lation of pyruvate dehydrogenase complex : 17. Pyruvate carboxylase is positively ated through the allosteric mechanism by : a. ATP b. NADH c. Acetyl-SCOA d. TPP e. Biotin 18. Which of the listed coenzymes does not particip...
Can someone please check my answers and aid in #12? 1. The amide nitrogen of glutamine:...
Can someone please check my answers and aid in #12? 1. The amide nitrogen of glutamine: A. represents a nontoxic transport form of ammonia. B. is a major source of ammonia for urinary excretion. C. is used in the synthesis of asparagine, purines, and pynimidines. D. can be recovered as ammonia by the action of glutaminase. E. all of the above are correct. 2- Which of the following statements about glutamate is NOT true: a It can be synthesized in...
Match the term to the correct description. Choices may only be used once. Group of...
Match the term to the correct description. Choices may only be used once. Group of answer choices [ Choose ] An inhibitor molecule binds to the active site. Part of an enzyme where the substrate binds to Protein molecules that function as biological catalysts An inhibitor molecule binds to an allosteric site and prevents the substrate from binding to the active site. A substance...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum and Golgi apparatus? A. lipids and steroids B. DNA polymerase and RNA polymerase C. lysosomal enzymes D. cytoskeletal proteins 30. Which of the following are processed in the Golgi apparatus? A. integral membrane proteins of the plasma membrane B. proteins that are secreted from the cell C. proteins that will be broken down by lysosomes D. all of the above E. none of the...
this are very difficult questions for my environmental biology class. These are examples from the practice...
this are very difficult questions for my environmental biology
class. These are examples from the practice homework so can anyone
please help me check my answers.
-) The temperature classes of microorganisms are based on optimum temperatures of microbi A) cell wall C) cell membrane B) enzymes D) All of the above 20) Aerobic respiration, anaerobic respiration, and fermentation are all pathways of which involve the of nutrients. A) Catabolism, reduction B) Anabolism; oxidation C) Catabolism; oxidation D) Anabolism, reduction...
Explain the basis for the following statement: As a coenzyme, pyridoxal phosphate is covalently bound to enzymes with which it functions, yet during catalysis the coenzyme is not covalently bound. Match the words in the left column to the appropriate blanks in the sentences on the right. Reset Help e-amino carboxylic acid PLP forms a covalent between the carbon of the coenzyme and an group of a lysine residue in the active site of the enzyme. This bond must be...
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Part A Which of the following is/are means whereby a catalyst can lower the activation energy of a reaction? quantum tunneling decreasing the number of reactive molecules permanently binding substrates inefficient collisions altering the temperature within the cell to one appropriate for reactions to proceed Subrnit Request Answer Part A An enzyme Obinds substrates in a manner that facilitates the formation of product decreases the rate of a reaction. is always...
What is the correct answer? Please explain.
Consider the kinetic plot of an enzyme catalyzed reaction to the right. Which of the following is not correct concerning the this enzyme? a. Compound stabilizes the ''R state'' of this enzyme. This enzyme exhibits ''cooperative binding'' of the substrate. This enzyme is probably composed of multiple catalytic and regulatory subunits. d. This enzyme is composed of a single polypeptide chain with one one binding site for substrate. Compound binds to a regulatory...
3. It is uncommon for one molecule to act as both an activator and inhibitor in metabolism. Which of the following molecules both activates glycolysis and inhibits gluconeogenesis? A. NAD B. Fructose 1,6-bisphosphate C. Pyruvate D. Fructose 2,6-bisphosphate E. Glucose 6-phosphate 4. Regulation of phosphorylase is by phosphorylation. However, this covalent modification increases or decreases activity without completely inhibiting it. The velocity plot is sigmoidal. What statement can be made about this enzyme? A. It likely follows a Michaelis-Menten kinetic....
12. Which of the following statements is true of enzyme catalysts? A B C To be effective, they must be present at the same concentration as their substrate. They can increase the equilibrium constant for a given reaction by a thousand-fold or more. They lower the activation energy for conversion of substrate to product. Their catalytic activity is independent of pH. They are generally equally active on D and L isomers of a given substrate. D E 13. In competitive...
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d. lactic acidemia e. pellagra syrup urine disease b, phenylketonuria c. galactosemia 10. Chemical modification by phosphorylation of pyruvate dehydros a. deactivates the enzyme b. activates the enzyme lation of pyruvate dehydrogenase complex : 17. Pyruvate carboxylase is positively ated through the allosteric mechanism by : a. ATP b. NADH c. Acetyl-SCOA d. TPP e. Biotin 18. Which of the listed coenzymes does not particip...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum and Golgi apparatus? A. lipids and steroids B. DNA polymerase and RNA polymerase C. lysosomal enzymes D. cytoskeletal proteins 30. Which of the following are processed in the Golgi apparatus? A. integral membrane proteins of the plasma membrane B. proteins that are secreted from the cell C. proteins that will be broken down by lysosomes D. all of the above E. none of the...
this are very difficult questions for my environmental biology
class. These are examples from the practice homework so can anyone
please help me check my answers.
-) The temperature classes of microorganisms are based on optimum temperatures of microbi A) cell wall C) cell membrane B) enzymes D) All of the above 20) Aerobic respiration, anaerobic respiration, and fermentation are all pathways of which involve the of nutrients. A) Catabolism, reduction B) Anabolism; oxidation C) Catabolism; oxidation D) Anabolism, reduction...
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