Which of the following best describes the way that genes, chromosomes, and dna are related? a. genes contain several sequences of dna, which are made up of chromosomes. b. sequences of dna contain several genes, which are made up of chromosomes. c. chromosomes contain several genes, which are made up of sequences of dna. d. genes contain several chromosomes, which are made up of sequences of dna.

What is a traditional chinese touch therapy involving finger pressure applied to specific areas of the body to restore the flow of qi.

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.

Cells destroy body cells infected by a virus or bacteria.