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.
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TLS Online TPP Program

#Question id: 4807

#Unit 8. Inheritance Biology

Three incompletely link marker gene was found. There is a marker A gene present in middle. Cross between aaBBcc X AAbbCC to produce heterozygous were allowed test cross, which of the following test cross offspring should be least frequent?

TLS Online TPP Program

#Question id: 4808

#Unit 8. Inheritance Biology

When F1 female Drosophila of the genotype AaBbCc is test crossed, ( Gene A and B located at 10 map unit in transe configuration but gene C are independently assort for both gene. Which of the following test cross progeny that is that is more frequent?

TLS Online TPP Program

#Question id: 4809

#Unit 8. Inheritance Biology

The upper most following figure above shows the locations of four genes on the genetic map of an organism; the lower figure shows the locations of the same four genes on a physical map derived from the nucleotide sequence of the DNA of that organism. The maps are not identical because

TLS Online TPP Program

#Question id: 4810

#Unit 8. Inheritance Biology

In a haploid organism, the C and D loci are 8 m.u. apart. From a cross C d X c D, which of the following proportion following progeny classes: (a) C D; (b) c d; (c) C d

TLS Online TPP Program

#Question id: 4811

#Unit 8. Inheritance Biology

Three incompletely link gene as a B-A-C order. A cross allowed between AAbbcc X aaBBCC produce f1 progeny allowed test cross. Which of the following offspring is a result of double cross over?

TLS Online TPP Program

#Question id: 4812

#Unit 8. Inheritance Biology

Two character X and Y ,both follow law of dominance due to 3:1 F2 phenotypic ratio monohybrid cross separately If carry out dihybrid selfing cross for heterozygous genotype for both character does not follow law of independence assortment in normal environmental condition due to?