Question

Which of the following molecules contains the most chemical potential energy? ADP AMP ATP Adenosine Why is the shape of enzyme activity as a function of temperature shaped like a shark fin and declines above a certain temperature? substrate molecules slow down as temperature increases DNA cannot form hydrogen bonds at high temperatures the enzyme structure is denatured by heat and cannot bind the substrate. the amino acid sequence of the protein changes with heat. You are hired to develop a drug to competitively inhibit an enzyme. Where should the drug on the enzyme? to a site on the enzyme far away from the active site directly to the active site directly to the substrate to the mRNA that encodes the enzyme Which of the following is NOT an example of a secondary messengers? Ca^2+ IP_3 cAMP NADPH How many carbon atoms are in one molecule of pyruvate? 1 2 3 4
Please solve

Answer 1

21. ATP contains most chemical potential energy as it transfers chemical energy to various metabolic processes and can obtain phosphate groups from ADP and AMP through substrate level, photo and oxidative phosphorylation processes. Hence, option C is correct.

22. The increase in temperature increases the kinetic energy of reaction initially. The further increase in temperature may cause break of bonds in the substrate and this will slow down or decline the rate of reaction over certain temperature. therefore, the option A is correct.

23. The drug must be bind to the active site of enzyme to competitively inhibit the binding of substrate at active site of enzyme. Option B is correct.

24. Secondary messengers initiate the intracellular signalling cascades. Ca²⁺ , IP₃ and CAMP are examples of secondary messengers. NADPH is a reduced cofactor NADP. Option D is correct.

25. A pyruvate molecule contains 3 carbon atoms. Molecular formula of pyruvate is C3H4O3. Option C is correct.