Which is not a direct precursor of pyrimidines in their de novo biosynthesis?

TLS Online TPP Program

#Question id: 24222

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following reaction of glycolysis is irreversible

1. Glucose is converted to glucose 6-phosphate in the presence of the enzyme hexokinase.

2. Fructose 6-phosphate is converted to fructose 1,6-biphosphate in the presence of the enzyme phosphofructokinase.

3. Phosphoenolpyruvate is converted to pyruvate in the presence of the enzyme pyruvate kinase.

4. isomerization of glucose 6-phosphate to fructose 6-phosphate

TLS Online TPP Program

#Question id: 24223

#Unit 1. Molecules and their Interaction Relevant to Biology

Phosphoglycerate mutase catalyses a reversible shift of the phosphoryl group between C-2 and C-3 of glycerate; which of the following ion is essential for this reaction

TLS Online TPP Program

#Question id: 24224

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following can be synthesized from pyruvate in one step, allosterically inhibits pyruvate kinase, slowing the production of pyruvate by glycolysis

TLS Online TPP Program

#Question id: 24225

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the incorrect option

TLS Online TPP Program

#Question id: 24230

#Unit 4. Cell Communication and Cell Signaling

Classical cadherin molecule do not contains: 

TLS Online TPP Program

#Question id: 24231

#Unit 4. Cell Communication and Cell Signaling

Match the following classes of classical cadherins with their functions.

 

a. E-cadherin      1.present on many types of epithelial cells

b. N-cadherin      2.present on nerve, muscle and lens cells

c. P-cadherin       3.present on cells in the placenta & epidermis