Aldosterone is a hormone that is released by the adrenal cortex when your blood pressure is low. it is a fat-soluble molecule and causes water conservation in the kidneys by causing more sodium pumps to be made when it binds with its receptors. which of the following would be true about his hormone?
1) aldosterone has receptors on the plasma membrane of kidney cells and activates a signal transduction pathway.
2) aldosterone has nuclear receptors inside kidney cells and activates gene expression.

Mouse liver cells were homogenized and the homogenate subjected to equilibrium density-gradient centrifugation with sucrose gradients. fractions obtained from these gradients were assayed for marker molecules (i. e., molecules that are limited to specific organelles). the results of these assays are shown in the figure. the marker molecules have the following functions: cytochrome oxidase is an enzyme involved in the process by which atp is formed in the complete aerobic degradation of glucose or fatty acids; ribosomal rna forms part of the protein-synthesizing ribosomes; catalase catalyzes decomposition of hydrogen peroxide; acid phosphatase hydrolysis monophosphoric esters at acid ph; cytidylyltransferase is involved in phospholipid biosynthesis; and amino acid permease aids in transport of amino acids across membranes. a) name the marker molecule and give the number of the fraction that is most enriched for each of the following cell components: lysosomes; peroxisomes; mitochondria; plasma membrane; rough endoplasmic reticulum; smooth endoplasmic reticulum.

Food contains a sugar called ( ), which is broken down in a process called cellular ( ). this process uses ( ) to break down food molecules and provide energy for cells. fill in the parentheses

When rutherford performed his metal foil experiment, he was surprised that most of the alpha particles