Choose the correct term for each definition or example. cell engulfs molecules in cell 'drinking*:
molecules helped by protein; move insoluble molecules across plasma membrane:
molecules move in and out freely from high to low concentration:
cell engulfs microorganisms in cell "eating*:
molecules "pumped" in or out from low to high concentration:
oxygen, carbon dioxide:
transports sodium, potassium:
transports glucose, amino acids:

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.

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.