Ans. 3) they dissociate from the enzyme after the reaction
1 . In a typical biological oxidation reaction, hydride from an alcohol is transferred to NAD+ giving NADH so first statement it incorrect
2. Pyridine is a basic heterocyclic organic compound with the chemical formula C5H5N second statement is false
3. they dissociate from the enzyme after the reaction
In the reaction catalyzed by ADH, an alcohol is oxidized to an aldehyde as NAD+ is reduced to NADH and dissociates from the enzyme where NAD+ is functioning as a coenzyme
Which of the following statements are false regarding NAD+ and NADH? 1.) in a typical biological...
Given the roles of NAD+ NADH in oxidation reactions and NADPH- NADP+ reduction reactions, discuss which cofactor is more commonly used in catabolic pathways and which one is in anabolic pathways? What do you expect the intracellular ratios of NAD+/NADH and NADP+/NADPH to be high or low under homeostasis? Explain your answers. Explain the benefits of the Q cycle comparing to direct transfer of electrons from QH2 to two cytochrome c Distinguish substrate-level phosphorylation and oxidative phosphorylation. Provide specific examples...
Select all true statements regarding ETC: High-transfer-potential electrons from NAD+ and FAD+ are responsible for the oxidation of oxygen to synthesize ATP ETC components are arranged so that electrons always flow to the component with increasing reduction potential FADH2-derived electrons yield more ATP than the amount of ATP produced from NADH-derived electrons None of these statements are true. Electron flow from ETC generates proton gradient
Choose a False statement regarding step 6 of glycolysis Oxidation and phosphorylation are decoupled The oxidant is NAD+ ATP not required for phosphorylation Reaction is endergonic, but the product is consumed in the next step to move the pathway forward Rationale: generation of a high-energy phosphate compound which allows for net production of ATP via glycolysis none of the answers are correct
Which one of the following statements about glucose metabolism is correct? A. Prokaryotes do not perform Krebs cycle for respiration. B. Krebs cycle involves the breakdown of a molecule of pyruvate into 6 CO2, 8 NADH, 2 FADH2, and 2 GTP molecules. C. The enzyme that catalyzes the addition of phosphate molecules to ADP in order to make ATP is called a kinase. D. In both glycolysis and Krebs cycle, the energy released from the breakdown of molecules is being...
1. Which one of the following shows the correct sequence of energy transitions during chemiosmosis? A. NADH → electron acceptors → proton gradient → ATP synthase → ATP B. NADH → NAD+ → FADH2 → electron acceptors → ATP C. carbohydrates → acetyl CoA → CO2 → proton gradient → ATP D. NAD+ → NADH → protons → ADP → ATP E. glucose → pyruvate → acetyl CoA → NADH → ATP 2. Facultative anaerobes: A. prefer carbon dioxide. B....
Microbiology In the competitive inhibition of enzyme activity, which statement is correct? Inhibitor directly competes with the substrate. Less substrates must be added in order to reach Vmax. The number of active sites is unlimited. None of the above. In the noncompetitive inhibition of enzyme activity, which statement is correct?Inhibitors will cause a conformational change in the enzyme, more substrate must be added to reach Vmax, Enzymes bound to the inhibitor can still bind substrate, none of the above. ....
Which of the following statements is FALSE? Nucleotides are only ever linked to one another 5’ to 3’ DNA can contain Uracil as a result of a chemical reaction MutS/MutL only works to repair the lagging strand of synthesis Alternative splicing happens in every eukaryotic gene All of these statements are false The protein that phosphorylates the CTD to initiate transcription is called EF-Tu eIF4 TFIID TFIIH RNA polymerase Which of these enzymatic activities in DNA replication require the input...
Which one of the following statements about gluconeogenesis is false? A. For starting materials, it can use carbon skeletons derived from certain amino acids. B. It consists entirely of the reactions of glycolysis, operating in the reverse direction. C. It employs the enzyme glucose 6-phosphatase. D. It is one of the ways that mammals maintain normal blood glucose levels between meals. E. It requires metabolic energy (ATP or GTP). The steps of glycolysis between glyceraldehyde 3-phosphate and 3-phosphoglycerate involve all...
Which of the following statements is false? O Most enzymes are proteins. Enzymes are biological catalysts that speed up reactions O a single type of enzyme can facilitate many different types of reactions O Enzymes can be denatured at extremes of temperatre and pH.
Which of the following statements regarding a bacterium that is R+ is FALSE? A) It possesses a plasmid. B) R+ can be transferred to a cell of the same species. C) R+ can be transferred to a different species. D) It is F+. E) It is resistant to certain drugs and heavy metals.