The transcription factor CREB is phosphorylated by a kinase in response to a signal the cell receives. The kinase hydrolyzes ATP and transfers a phosphate group to CREB. Phospho-CREB will bind specific DNA sequences and activate transcription of target genes. Therefore, target gene expression is low in the absence of a signal and high in the presence of the signal. What will happen to target gene expression if you add excess non-hydrolyzable analog of ATP to the cells

You have a solution that contains phospholipid vesicles in a test tube. these vesicles have phospholipid bilayers, but do not contain any membrane transporters. you add a number of different molecules to the solution, and wait a period of time for them to equilibrate. if you could measure the concentration of each molecule, for which of the following would you expect to measure equal concentrations inside and outside of the vesicles? assume for this question that the overall osmolarity inside and outside the vesicles is the same (that is, there is no appreciable diffusion of water across the membrane). (select two answers) an amino acid with a hydrophobic side-chain a small non-polar molecule a negatively charged ion a small polar molecule a small lipid hormone

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere