Blog

(03.07 MC)A Y-linked disease is a sex-linked disorder found on the Y chromosomes. Who can be afflicted with a Y-linked disease?

(03.06 MC)Duchene muscular dystrophy, or DMD, is a recessive, x-linked disease. What would you expect to see in the offspring of a woman who has DMD and a man who does not have the disease?

(02.01 MC)During winter’s freezing temperatures, some plants can remove water from their cells to reduce the amount of water that will freeze inside them. Why would plants need to do this?

(03.07 MC)In humans, the allele for a widow’s peak is dominant to the allele for a straight hairline. In a family with three children, two of the children have a straight hairline and one child has a widow’s peak. Which of the following is possible?

(02.02 MC)Which of the following is characteristic of a prokaryotic cell?

(02.04 MC)In terms of structure and function, how do the vacuoles in a typical plant cell compare to those of a typical animal cell?

(02.04 HC)Prior to the invention of refrigeration, meat was often preserved by soaking it in brine (a solution of water with a high concentration of salt) to kill any microorganisms that might have tried to use the meat as their own food source. Which of the following best explains how a brine solution could be lethal to those microorganisms?

(03.03 HC)   U   C   A   G       UUU Phenylalanine UCU Serine UAU Tyrosine UGU Cysteine U U UUC Phenylalanine UCC Serine UAC Tyrosine UGC Cysteine C   UUA Leucine UCA Serine UAA Stop UGA Stop A   UUG Leucine UCG Serine UAG Stop UGG Tryptophan G   CUU Leucine CCU Proline CAU Histidine CGU Arginine U C CUC Leucine CCC Proline CAC Histidine CGC Arginine C   CUA Leucine CCA Proline CAA Glutamine CGA Arginine A   CUG Leucine CCG Proline CAG Glutamine CGG Arginine G   AUU Isoleucine ACU Threonine AAU Asparagine AGU Serine U A AUC Isoleucine ACC Threonine AAC Asparagine AGC Serine C   AUA Isoleucine ACA Threonine AAA Lysine AGA Arginine A   AUG Methionine/Start ACG Threonine AAG Lysine AGG Arginine G   GUU Valine GCU Alanine GAU Aspartate GGU Glycine U G GUC Valine GCC Alanine GAC Aspartate GGC Glycine C   GUA Valine GCA Alanine GAA Glutamate GGA Glycine A   GUG Valine GCG Alanine GAG Glutamate GGG Glycine G If an error in transcription causes the last cytosine in an mRNA sequence that was supposed to read UUG AUC CAA UGC to be replaced with a guanine, which of the following do you predict would happen?

(02.04 MC)The contracting and relaxing of muscle is regulated by the amount of calcium present in the cells of muscle fibers. These cells must be able to move the calcium ions from areas with low concentrations to areas with high concentrations. What process would be necessary for this movement to occur?

(02.06 LC)Which statement correctly describes the process of photosynthesis?