Which of the following is a function of a modified histone tail?

#Question id: 1259

#Unit 4. Cell Communication and Cell Signaling

Following statements are regarding to the phosphoinositide pathway.

A. many activated RTKs and cytokine receptors initiate phosphoinositide pathway by recruiting the enzyme phosphatidylinositol-3 kinase (PI-3 kinase) to the membrane.

B. PI-3 kinase adds a phosphate to the 3′ carbon in one of two separate phosphatidylinositol substrates, leading to formation of two phosphatidylinositol 3-phosphates: PI(3,4)P2 or I(3,4,5)P3

C. PI-3 kinase pathway can trigger cell division and prevent apoptosis, thus ensuring cell survival by the activation of PKB.

D. Activated PKB phosphorylates FOXO3a, which induces the expression of several antiapoptotic genes.

Which of the following combination is correct?

#Question id: 15763

#Unit 5. Developmental Biology

#Question id: 1165

#Unit 4. Cell Communication and Cell Signaling

DAG activates:

#Question id: 176

#Unit 1. Molecules and their Interaction Relevant to Biology

A peptide has the sequence Glu–His–Trp–Ser–Gly–Leu–Arg–Pro–Gly. What is the net charge of the molecule at pH 3

#Question id: 30115

#Unit 1. Molecules and their Interaction Relevant to Biology

The antibacterial trimethoprim is an inhibitor of