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TLS Online TPP Program

#Question id: 6999

The developmental precursors to the gonadal tissues of Caenorhabditis elegans uniquely contain ________.

#Unit 5. Developmental Biology
  1. proteins of maternal origin
  2. high concentrations of potassium ions
  3. T tubules for the propagation of action potentials
  4. P granules of mRNA and protein
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TLS Online TPP Program

#Question id: 28291

#Unit 5. Developmental Biology

cortical granules form an osmotic gradient which causing water to enter and swell the space between the vitelline envelope and the cell membrane. these cortical granules is released by____
TLS Online TPP Program

#Question id: 13194

#Unit 1. Molecules and their Interaction Relevant to Biology

If we have the sequence 5’-ATGTC-3’ on one chain, the opposite chain must have the complementary sequence 
TLS Online TPP Program

#Question id: 30118

#Unit 1. Molecules and their Interaction Relevant to Biology

The following enzymes are involved in the catabolism of AMP to uric acid. The correct order of their use is:

1. A deaminase
2. A nucleoside phosphorylase
3. A nucleotidase
4. Xanthine oxidase
TLS Online TPP Program

#Question id: 33240

#Unit 1. Molecules and their Interaction Relevant to Biology

Metal ions participate in the catalytic process
A. By binding to substrates to orient them properly for reaction.
B. By mediating oxidation–reduction reactions through reversible changes in the metal ion’s oxidation state.
C. By electrostatically stabilizing or shielding negative charges.
Which is/are correct statement
TLS Online TPP Program

#Question id: 7235

#Unit 5. Developmental Biology

Following statements are regarding to the wingless gene in drosophila.

A. In the cells transcribing the wingless gene, wingless mRNA is translocated by its 3’UTR to the apex of the cell. At the apex, the wingless message is translated and secreted from the cell.

B. The cells expressing engrailed can bind this protein because they contain Patched, which is the Drosophila membrane receptor protein for Wingless.

C. Binding of Wingless to Frizzled activates the hedgehog signal transduction pathway, resulting in the continued expression of engrailed.

D. Wingless protein also acts in an autocrine fashion, maintaining its own expression.

Which of the following combinations is correct?