The following statements are either True or False. Please label accordingly. a. L-Amino reductase is an enzyme. b. Allosteric enzymes are composed of two or more protein chains. Heavy metals are examples of inhibitors. They function by binding to sulfur on cysteine amino acid residues. C. d. A reversible noncompetitive inhibitor temporarily blocks an enzyme's active site. Enzymes don't denature as easily as smaller proteins when heated or stressed due to their complex secondary and tertiary structure. e. Oxidative phosphorylation is the biochemical process by which ATP is synthesized from ADP when protons cross the inner mitochondrial membrane. f. g. DNA and RNA strands differ only in the fact that DNA forms a double helix. h. There is no secondary structure in RNA strands.

The following statements are either True or False. Please label accordingly. a. L-Amino reductase is an enzyme. b. Allosteric enzymes are composed of two or more protein chains. Heavy metals are examples of inhibitors. They function by binding to sulfur on cysteine amino acid residues. C. d. A reversible noncompetitive inhibitor temporarily blocks an enzyme's active site. Enzymes don't denature as easily as smaller proteins when heated or stressed due to their complex secondary and tertiary structure. e. Oxidative phosphorylation is the biochemical process by which ATP is synthesized from ADP when protons cross the inner mitochondrial membrane. f. g. DNA and RNA strands differ only in the fact that DNA forms a double helix. h. There is no secondary structure in RNA strands.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter4: How Cells Obtain Energy

Section: Chapter Questions

Problem 5RQ: Which of the following is not true about enzymes? a. They are consumed by the reactions they...

See similar textbooks

Similar questions

a) what happens if an enzyme is not made correctly? b) what is the function of the major RNA is it proteins synthesis? c) what is the primary source of all glucose, and why is it such an important monosaccharide?You need to include its molecular formula. d) when you react ammonia with a halogenated alkane will you get only one organic product? Why or why not? (do not talk about inorganic products) e) emulsifiers are pretty important compounds for daily life, externally and internally to us humans. Describes the two parts of an emulsifier molecule, and how most emulsifiers work and what they actually do. f) consider the ring structure of B-D glucose. it will give a positive test as a reducing sugar. Describe how that can happen in a pH=7 solution such as fehlings'?
Suicide substrates are molecules that resemble the substrate. When these molecules enter into the active site, they form a covalent bond with the enzyme, thereby permanently inhibiting it. These molecules have been used to label the amino acid side chains that are involved in the catalytic reaction occurring within the active site. This is usually accomplished by hydrolyzing the inhibited enzyme. How could an investigator identify the amino acid bound to the suicide substrate molecule?
Streptokinase is an enzyme produced by Streptococci bacteria and is used to digest fibrin clots. It is therefore very effective at eliminating blood clots that cause heart attacks and strokes. Why does a physician not worry that injecting streptokinase will also destroy healthy tissue in their patients? – this answer should discuss the specificity of enzymes for their substrates, defined by the shape of the active site.
Complete the sentences below using information from the viewer.These six amino acid residues are split between two subunits. Together, they form an (acidic/basic) tunnel that appears to connect the two active sites. Mutation of several of these residues to Ala results in a significant decrease in the decarboxylation activity of the enzyme. Researchers propose that this region may be important for proton shuttling between the two active sites to ensure that only one is catalytically active at a time.
Protease acts on proteins to convert them into amino acids. Which of the following statements is correct? a. Protease is produced in the salivary glands. b. All of the answers. c. The enzyme is protease and amino acids are the products. d. Amino acid is the substrate which acts on the enzyme. e. Protease is the substrate while amino acids are the products.
a) What amino acid is metabolite 1? b) What kind of reaction occurs when 1 is converted to 2? c) What kind of enzyme performs the reaction converting 1 to 2? d) What biomolecule (a) is needed for the reaction to occur? e) What biomolecule (b) is produced in addition to 2? f) What happened to metabolite 3 when it was converted to 4? g) What kind of enzyme might perform the conversion of 3 to 4? h) What cofactor(s) would be required in the conversion of 3 to 4? i) What kind of reaction happens when 4 is converted to 5? j) What kind of reaction happens when 5 is converted to 6? k) What is the name of metabolite 7? l) What is the name of metabolite 8?
Which of the following would best explain how an enzyme catalyzes two different reactions? A) The enzyme contains a-helices and B-pleated sheets. B) The enzyme is subject to cooperativity C) Either the enzyme has two distinct active sites or the substrates involved in the two reactions have very similar structures D) The enzyme is subject to competitive inhibition and allosteric regulation E) The enzyme is composed of at least two subunits
Although all of these play a part, the most important factor which drives protein folding is: a) hydrogen bond formation b) salt bridge formation c) ion-dipole interactions d) the hydrophobic effect The active site of an enzyme binds which type of molecule? a) allosteric activator b) coenzyme c) substrate d) product A coenzyme is also considered to be a prosthetic group if it: a) assists in enzyme catalysis b) binds to the active site c) acts as an allosteric inhibitor d) is covalently bound to the enzyme Proteases catalyze the cleavage of proteins into smaller peptides and amino acids by reaction with water. Proteases fall into the broader class of: a) transferases b) lyases c) hydrolases d) oxidoreductases 13. The Michaelis - Menten constant Km represents: a) 1/2 Vmax b) the substrate concentration at 1/2 Vmax c) 1/2 the substrate concentration at Vmax d) the minimum amount of substrate needed to initiate the reaction Enzymes alter which of these…
Four important properties of enzymes are high catalytic rate,high degree of substrate specificity, negligible formation ofside products, and _____________________.
Beta oxidation is ______. a. the breakdown of sugars b. the assembly of sugars c. the breakdown of fatty acids d. the removal of amino groups from amino acids
If a person’s liver does not produce the enzyme at #2, what implications does this have for the person’s diet? Check all that apply. Group of answer choices a. The person cannot store fat in the body and would need to eat constantly b. The person cannot produce a glucose alternative fuel c. The person cannot store glucose in the body and this nutrient become essential d. The person would not be able to maintain a low-carb diet for long periods e. The person’s brain would not function properly
Which of the following statements helps best explain the reaction specificity of an enzyme? a) The shape and charge of the substrates are compatible with the active site of the enzyme. b) The free energy of the reactants is greater than the free energy of the products. c) The equilibrium constant of the reaction is much greater than 1. d) The concentration of the enzyme inside living cells is greater than the concentration of substrate.