Imagine that you are conducting experiments and you have a cell line that responds to an external hormonal signal by entering the apoptotic pathway. how would these cells respond to this hormonal signal if you could instantly and completely inactivate the bcl-2 protein? a: since bcl-2 normally protects cells from apoptosis, loss of this protein would cause these cells to go through apoptosis. b: since bcl-2 normally protects cells from apoptosis, loss of this protein would prevent apoptosis. c: since bcl-2 normally promotes apoptosis, loss of this protein would prevent apoptosis. d: none of the choices is correct.

List two modern organisms that have pentameral symmetry

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?