Which of the muscles is the rectus abdominis? This diagram shows the muscles of the human body. There are four labeled arrows (A-D). “A” is pointing to the large muscle occupying the most exterior muscle of the chest. “B” is pointing to the row of square shaped muscles on the anterior side of the abdomen. “C” is pointing to a long, ribbon-like muscle that runs from lateral to medial across the anterior side of the right thigh. “D” is pointing to the muscle that occupies the posterior side of the lower portion of the leg.

© Image Courtesy of 3DScience. com 2013

A
B
C
D

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The human genome project is devoted to mapping the general dna sequence of our species. this could lead to the development of new medicines, as well as the possibility of using gene therapy to treat certain diseases. however, there are some ethical issues surrounding the mapping of individual genomes. one concern is a) that your genes may change over time, making the project useless. b) that insurance companies could discriminate based on genetic make-up. c) that since this has never been done before, we should probably not do it now. d) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.

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.