Use the information gathered in the nucleotides molecular structure tutorial to answer the question. select the phrases that accurately describe properties of the most common form of the dna double helix. the nitrogenous bases are exposed to the solvent, whereas the sugar–phosphate backbone of each nucleotide strand is in the interior of the double helix. the phosphodiester bonds between nucleotide residues run in opposite directions in the two strands. base pairs have a spacing of 20 å. dna contains equal amounts of adenine and thymine, and equal amounts of cytosine and guanine. a helical turn consists of about 10 base pairs.

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

Which of these best describes wde by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm

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.