A scientist makes three artificial mRNA strands: (x) 5' AAAUUUAAAUUUAAAUUUAAAUUUAAA 3'(y) 5' UUUCCCUUUCCCUUUCCCUUUCCCUUU 3'(z) 5' AUAUAUAUAUAUAUAUAUAUAUAUAU 3'When he analyzes the polypeptides produced, he finds that:x produces a polypeptide that is 50% phenylalanine and 50%lysine.y produces a polypeptide that is 50% phenylalanine and 50% proline.z produces a polypeptide that is 50% isoleucine and 50% tyrosine.Based on these results only, the best conclusion to make is that
A. AAA codes for phenylalanine and AUA codes for isoleucine
B. AUA codes for isoleucine
C. AAA codes for phenylalanine
D. AAA codes for lysine and AUA codes for isoleucine
E. AAA codes for lysine
Answer: E
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A heart murmur is caused by
A. a greater-than-normal force of contraction of the right atrium. B. a constriction of the pulmonary artery. C. blockage of the aorta. D. the heart valves not functioning properly. E. a greater-than-normal force of contraction of the left atrium.
White fruit color in summer squash is influenced by a dominant allele W, whereas colored fruit must be ww. In the presence of ww, a dominant gene G results in yellow fruit, and homozygous gg results in green fruit. The F2 phenotypic ratios resulting from a cross of a true-breeding plant with white fruit (genotype WW GG) with a plant with green fruit will result in which phenotypic ratios?
A. 8/16 white, 4/16 yellow, 4/16 green B. 12/16 white, 3/16 yellow, 1/16 green C. 4/16 white, 8/16 yellow, 4/16 green D. 12/16 white, 2/16 yellow, 2/16 green E. 8/16 white, 8/16 green
A cartilage disk that joins the two pelvic bones in the anterior region of the pelvic girdle is known as the ________
A) sacrum B) pubic symphysis C) patella D) pelvis
Mark suffers from nosebleeds and gastrointestinal bleeding due to increased breakdown of platelets outside the marrow. This is called
A. hemophilia. B. sickle-cell anemia. C. thromboembolism. D. prothrombin disease. E. thrombocytopenia.