Transketolation mRNA is complementary to ?
**Core Concept**
Transketolase is an enzyme involved in the pentose phosphate pathway, a metabolic pathway that generates NADPH and pentoses from glucose-6-phosphate. The transketolation reaction is a key step in this pathway, where transketolase catalyzes the transfer of a 2-carbon ketol group from xylulose-5-phosphate to ribose-5-phosphate, resulting in the formation of sedoheptulose-7-phosphate and glyceraldehyde-3-phosphate.
**Why the Correct Answer is Right**
The mRNA for transketolase is complementary to the template strand of DNA that codes for this enzyme. The process of transcription involves the unwinding of DNA and the synthesis of a complementary RNA molecule from the template strand. The correct answer is the one that represents the correct complementarity of the mRNA to the DNA template.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not represent the correct complementarity of the mRNA to the DNA template.
**Option B:** This option is incorrect because it is not the correct sequence of nucleotides that would be complementary to the DNA template.
**Option C:** This option is incorrect because it does not accurately represent the transketolase enzyme or its mRNA sequence.
**Clinical Pearl / High-Yield Fact**
The pentose phosphate pathway is an important source of NADPH, which is required for various cellular processes including fatty acid synthesis and antioxidant defenses.
**Correct Answer: C. The sequence complementary to the DNA template that codes for transketolase mRNA.**