Four-o’ clock flowers may be red, pink or white. in the crossing of true-breeding red and true-breeding white plants, all the offspring are pink. use a punnett square to determine the correct genotype of the offspring if the red parent has genotype rr and the white parent has genotype rr.
(a) rr and rr
(b) rr and rr
(c) rr only
(d) rr only

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.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

What molecule does hemoglobin decay into over time