Solve all parts otherwise I will downvote 4. Enzymatic activity can be regulated by:(I) The molecular weight of enzyme molecule.(II) Covalent modification such as phosphorylation of an enzyme.(II) Effector molecules that bind to the allosteric site of an enzyme.(A) (1) only(B) (I) and (II) only(C) (II) and (lII) only(D) All of the aboveWhich of the following statements about citric acid cycle is INCORRECT?5.(A) Some of the reactions are oxidation-reduction reactions.(B) It provides precursor for amino acid synthesis.(C) Three carbon atoms will be removed in each turn of the cycle as carbondioxide (CO2).(D) It can generate energy carrying biomolecules such as GTP (Guanosinetriphosphate) or ATP (Adenosine triphosphate).

Enzymes are proteinaceous molecules that increase the rate of any biochemical reaction by decreasing…

Answered: 4. Enzymatic activity can be regulated…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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2. Which statement accurately describes the difference between coenzymes and prosthetic groups? A) Coenzymes are covalently bound to their associated enzymes. ) Coenzymes are released from the enzyme's active site during a reaction. C) Prosthetic groups are metal ions that are located at the enzyme's core. D) Prosthetic groups can transport functional groups between enzymes
What kind of reaction does each of these enzymes catalyze?(a) A dehydrase(b) A carboxylase(c) A protease
Which of the following statements about enzyme character-istics is true?(a) Enzymes generally exhibit a high degree of specificityfor one particular substrate.(b) Enzyme-substrate complexes occur when a substratemolecule collides with the allosteric site of an enzyme.(c) Chemical bonds within a substrate are strength-ened when this substrate forms an enzyme-substratecomplex.(d) Enzymes have a region called the active site, which pro-vides an area where it can form a loose association withits substrate.(e) a and d.
8). Which statement best describes 1 point the enzyme represented in the graphs? O 10 20 30 40 50 60 O 2 4 6 10 12 Temperature ("C) PH (1) This enzyme works best at a temperature of 50°C and a pH of 12. (2) Temperature and pH have no effect on the action of this enzyme. (3) This enzyme works best at a temperature above 50°C and a pH above 12. (4) This enzyme works best at a temperature of 35°C and a pH of 8. Relative Rate of Enzyme Action Relative Rate of Enzyme Action
Cells carry out anabolic as well as catabolic pathways, with some enzymes functioning in both types of pathways. (a) Explain why these enzymes catalyze near-equilibrium reactions. (b) Explain why opposing anabolic and catabolic pathways must have different enzymes for at least one of the steps.
“Induced fit” means that when a substrate binds to an enzyme’s active site, (a) it fits perfectly, like a key in a lock (b) the substrate and enzyme undergo conformational changes (c) a site other than the active site undergoes aconformational change (d) the substrate and the enzyme become irreversibly bound to each other (e) c and d
5. Enzymes are incredibly effective at facilitating chemical reactions and must be controlled- or the chemical reaction won't stop and the reactant(s) might be used up. (A) Use 3 different colors to color the coding circles and corresponding structures in the figures. (B) Draw an arrow pointing to the active site in each figure. (C) Beneath each diagram, write the type of inhibition and briefly, in your own words, explain what is happening. PG al JartW Mool bluow nolsoeen er edw gni nobisvitae ert wori gniworla en qsp/ru to can't S uid can't weib (A) wole Ts w.bind b (8) bris bobl ewm bind oll omysne erlf yd beoue o.gons O Enzyme O Reactant (substrate) O Inhibitor Enzyme Enzyme Type of inhibition: Type of inhibition:
2. “Most enzymes are gene-encoded proteins." Using this lens, explain: A) effects of increased temperature on the rate of enzymatic reactions, and B) effects of decreased temperature on enzymatic reactions, and C) importance of optimal pH and ionic strength on enzymatic reactions.
Some bacteria are metabolically active in hot springs because(A) they are able to maintain a lower internal temperature.(B) high temperatures make catalysis unnecessary.(C) their enzymes have high optimal temperatures.(D) their enzymes are completely insensitive to temperature.
give the properties of the enzyme (e.g., shape, size, colour, price). a) amylase b) invertase
The active site of an enzyme is usually a groove or pocket on the surface that A) binds allosteric regulators of the enzyme. B) is involved in the catalytic reaction of the enzyme. C) is inhibited by the presence of a coenzyme or a cofactor.
In what way(s) are Trypsin, Chymotrypsin, and Elastase different? (choose 1) a) They target different amino acid residues in proteins. b) They use different reaction mechanisms c) Both of the above d) Neither of the above

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