QUESTION 14 Feedback inhibition is best descibed as O substrate binding to DNA b

Question

QUESTION 14 Feedback inhibition is best descibed as O substrate binding to DNA blocking enzyme transcription O Product binding to DNA, blocking enzyme transcription O substrate birding to enzyme in non-competitive site O Product binding to enzyme in non-competitive site O None of the choices are correct QUESTION 15 A holoenzyme is a combination of a protein and one or more substances called O Substrates O Catalysts O Cofactors None of the choices are correct QUESTION 16 Which of the following is not a process that regenerates ATP? O Oxidative phosphorylation O Reductive phosphorylation O Substrate level phosphorylation Photophosphorylation QUESTION 17 How many carbon dioxide molecules are produced by the complete aerobic breakdown of one glucose molecule? 02 03 06 QUESTION 18 Building block molecules for biosynthetic pathways come from the celfs catabole pathways and from the environment O True False QUESTION 19 What chemical causes death in many eukaryotes because it blocks cytochrome c oxidase? o Copper O Iron

Explanation / Answer

14. product binding to enzyme in noncompetitive site

Feedback inhibition is a control mechanism in which an enzyme's activity is inhibited by the enzyme's end product.It works by deactivating an enzyme using the product of the reaction the enzyme catalyzes

15. Cofactors

A holoenzyme is a catalytically active enzyme consisting of an apoenzyme combined with its cofactor.

16 Reductive phosphorylation

17. 6

C6H12O6 + 6 O2 6 CO2+ 6 H2O

18. True

19. Cyanide

Acute cyanide toxicity is attributed to inhibition of cytochrome c oxidase (CcOX), the oxygen-reducing component of mitochondrial electron transport;

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