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TLS Online TPP Program

#Question id: 973

What is the source of the atoms 5 and 7 during de novo biosynthesis of purines?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. glycine

  2. glutamine 

  3. aspartate

  4. arginine

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TLS Online TPP Program

#Question id: 28210

#Unit 5. Developmental Biology

Morphogen specifies cells in___
TLS Online TPP Program

#Question id: 7190

#Unit 5. Developmental Biology

In amphibia, few mutants (Column A) and their affected event or organ (Column B).

            Column A

        Column B

I. mRNA of cadherin is destroyed by antisense oligonucleotides

a. Epiboly

II. Loss of methylation on H3K4

b. Convergent extension

III. Loss of function of tbxt gene

c. Blastocoel

IV. Knockdown of C3a with antisense morpholinos

d. MBT

V. Inhibition of PCP pathway

e. Notochord

 

Which of the following is correct?
TLS Online TPP Program

#Question id: 7207

#Unit 5. Developmental Biology

Which of the following statements is true about formation of the primitive streak ?

A. by the cellular dance mechanism, the cells came down the sides of the epiblast to undergo a medially directed intercalation of cells in the posterior margin where primitive streak forms.

B. Cellular dance is mediated by wnt planar cell polarity pathway in the hypoblast cells, at the posterior edge of the embryo.

C. The Wnt pathway activated by fibroblast growth factors (FGFs) produced by the hypoblast.

D. The Wnt planar cell polarity pathway activated by b-catenin produced by the epiblast.
TLS Online TPP Program

#Question id: 13226

#Unit 6. System Physiology – Plant

Mengel and Kirkby  have proposed that the essential elements be classified instead according to their biochemical role and physiological function, It shows such a classification, in which plant nutrients have been divided into some basic groups these are;
a.) The first group is nutrients that are part of carbon compounds
b.) The second group is important in energy storage reactions or in maintaining structural integrity
c.) The third group has important roles in reactions involving electron transfer or redox reaction
d.) The fourth group is present in plant tissue as either free ions or ions bound 
Which one of the following group represents CORRECT statements
TLS Online TPP Program

#Question id: 4256

#Unit 2. Cellular Organization

With respect to CpG islands in our genomic DNA, which, if any, of the following descriptions do not apply?

1) frequently occurring (there are about 30,000 in the human genome).

2) long DNA sequences (typically from 10 kb to 100 kb in length).

3) low CG dinucleotide frequency.

4) frequently associated with transcriptional start sites.