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TLS Online TPP Program

#Question id: 30112

With respect to the de novo synthesis of nucleotides, which one of the following statements is INCORRECT?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. Biosynthesis of both purine and pyrimidine nucleotides begin with ribose‐5‐phosphate and purine or pyrimidine rings are built on it.
  2. The first purine nucleotide biosynthesized by de novo pathway is inosinic acid or inosine‐monophosphate.
  3. The first pyrimidine nucleotide biosynthesized by de novo pathway is orotidylic acid or orotidine monophosphate
  4. Thymidylate or TMP is synthesized as deoxy‐TMP from deoxy‐UMP by thymidylate synthetase.
More Questions
TLS Online TPP Program

#Question id: 4128

#Unit 3. Fundamental Processes

Which of the following statements about tRNA molecules is false?
TLS Online TPP Program

#Question id: 4129

#Unit 3. Fundamental Processes

Which of the following statements about the tRNA that normally accepts phenylalanine is false?  (mRNA codons for phenylalanine are UUU and UUC.)
TLS Online TPP Program

#Question id: 4130

#Unit 3. Fundamental Processes

Which of the following is not true of tRNA molecules?
TLS Online TPP Program

#Question id: 4131

#Unit 3. Fundamental Processes

Aminoacyl-tRNA synthetases (amino acid activating enzymes):
TLS Online TPP Program

#Question id: 4132

#Unit 3. Fundamental Processes

In E. coli, aminoacyl-tRNA synthetases:
TLS Online TPP Program

#Question id: 4133

#Unit 3. Fundamental Processes

Which of the following statements about aminoacyl-tRNA synthetases is false?