(5 points) let’s take it one step further! use the data chart below to answer the following question. light intensity (%) o2 produced (ml/h) 30 8.8 40 26.1 50 31.3 60 31.3 the data above was collected during an elodea observation. notice what happens to the oxygen produced at light intensities of 50% or higher. everything has its limits, even chemical reactions! think about a powerful race car. if you give it more fuel and better tires, it can go very fast. but, eventually, its speed will top out due to the limitations of the motor. even if you kept adding fuel and tires, it couldn’t go any faster. explain how the data in this experiment suggests there is a maximum photosynthetic rate. be sure to discuss the reactants and products in your answer.

Dna is colied into chromosomes in a cell

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.

The chemical form of energy that is useable by the cell to do work