Answer:
Passive transport moves molecules without energy
Explanation: hope this helps plz make brainlist
Answer:
A virus
Explanation:
It is also known as bacteriophage, but it is a virus
Answer:
a mutation that blocks the GTPase activity of Ras
Explanation:
A G protein in inactive state is GDP bound but as soon as a guanine exchange factor (GEF) exchanges it with GTP it gets activated which means that in GTP bound state it is active. G - protein has endogenous GTPase activity. Upon interaction of GAP, the GTPase activity of this protein is exhibited. When GAP is present, hydrolysis of GTP into GDP occurs which leads to inactivation of G protein. A mutation which will block GTPase activity of Ras will therefore result in constitutive active signaling even in the absence of ligand binding to it's receptor. In such scenario, GTP will not be hydrolyzed into GDP so signaling will be up-regulated.
Answer:
Un grupo de evolucionistas moleculares de los Institutos Nacionales de la Salud (NIH, en Bethesda, Estados Unidos) acaba de concluir que LUCA, el organismo primitivo del que provienen todos los seres vivos actuales -sean microbios, gladiolos o seres humanos- era una bacteria de vida autónoma con 572 genes.
