We can examine the effect of -amylase on starch with a simple experiment that you may have already done. Take a piece of bread or a cracker and chew it. Do not swallow the piece of bread, but allow it to sit in your mouth for a few minutes. What do you notice about the bread? Based on the results, what would you assume are the building blocks of starch? Are the results similar for different types of starchy foods?

All eukaryotic cells contain small bodies called

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.