The given question incomplete. However, the missing part is given below:
1.Which of the following are substrates of the ribonucleotide reductase reaction? 2.Which of the following are products of the ribonucleotide reductase reaction? 3.What is the best description of the reaction? 4. what is the ultimate electron donor? 5.Which of the following can directly donate an electron to ribonucleotide reductase?
Answer:
The correct answer is-
1. NDP (ADP, CDP, GDP, or TDP)
2. dNDP ( dADP. dCDP, dGDP, or dTDP)
3. Oxidation-reduction
4. NADPH
5. Thioredoxin
Step-by-step explanation:
Ribonucleotide reductase reaction is catalyzed by the enzyme called ribonucleotide reductase which is a key enzyme that synthesizeS the deoxyribonucleotide from ribonucleotide, Deoxyribonucleotide is the precursor of DNA.
This reaction is an oxidation-reduction reaction that reduces all ribonucleotides ADP, CDP, GDP, or TDP to dADP. dCDP, dGDP, or dTDP. The ultimate electron donor in this oxidative-reductive reaction is NADPH however thioredoxin directly transfers an electron to ribonucleotide.