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: 19709

#Unit 3. Fundamental Processes

Following are statements related to the telomere related to the stability chromosome
a) protecting the ends of chromosomes from degradation 
b) preventing chromosomal end fusion
c) protect genome from nucleolytic degradation
d) provide a mechanism for their replication by semiconservative length maintenance 
choose the correct statement 

TLS Online TPP Program

#Question id: 19710

#Unit 3. Fundamental Processes

Telomeric sequences can be written in the general form 

TLS Online TPP Program

#Question id: 19711

#Unit 3. Fundamental Processes

Telomere are marker for the healthy cell, if the cell shows indefinite replication (embryonic or stem cell) the size of telomere lies between the range of  

TLS Online TPP Program

#Question id: 19712

#Unit 3. Fundamental Processes

Size of telomeric sequences are marker for the cell division and healthy cell,  Below some of the stages and sizes of telomere are given below

i. 3 – 20 kb (TTAGGG)n

a. cancerous cell

ii. less than 3 kb (TTAGGG)n

b. apoptotic cell death

iii. Ends with no (TTAGGG)n

c. limited replication

iv. Up to 55 kb of (TTAGGG)n

d. indefinite replication

Match them correctly

TLS Online TPP Program

#Question id: 19713

#Unit 3. Fundamental Processes

Which of the followings is the incorrect statement regarding telomeric sequences 

TLS Online TPP Program

#Question id: 19714

#Unit 3. Fundamental Processes

The extension of GGGGTT is prioritize, while the extension of CCCCAA is not possible because of