Key sequences exist within promoters, which vary somewhat among various promoters but are sufficiently constant that they can be represented by a sequence of bases most often found at each position. These representations are called ________ sequences.
A. idealized
B. common
C. consensus
D. convergence
Answer: C
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How would you best follow the timing of expression of a given protein during development in a live animal?
A) in situ hybridization B) RT-PCR C) using a transgenic organism that expresses a GFP fusion protein D) microarray analysis E) using antibodies against the protein of interest
To visualize the structure of DNA, which has a width of 10 nm, which microscope would be best?
a. fluorescence microscope b. light microscope c. staining microscope d. polarized microscope e. electron microscope
Which of the following statements regarding animal digestive systems is false?
A) We expect that an herbivore will have a longer alimentary canal than a carnivore of similar body size. B) Meat is more difficult to digest than vegetable matter because of its protein content. C) Many herbivorous animals have cellulose-digesting microbes in their colon and cecum. D) When cows chew their cud, it helps to soften and break down plant fibers, making these more accessible to digestion by microbes.
A urine dipstick test can diagnose urinary tract infections by indicating
A) elevated levels of leukocyte esterase. B) the presence of glucose in the urine. C) conversion of nitrite to nitrate in the urine. D) direct detection of Gram-positive or Gram-negative bacteria. E) elevated creatine and BUN levels.