The genome of Pelagibacter ubique ________.
A. is the smallest one thus far sequenced for a non-parasitic bacterium
B. has a very limited number of nucleotides between coding regions
C. contains no pseudogenes
D. All of the choices are correct.
Answer: D
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DNA codes for the production of
a. proteins. b. minerals. c. inorganic molecules. d. vital gasses. e. water.
There is an autosomal gene that controls baldness, and
its expression is sex-influenced, so that the gene for baldness (B) is dominant in males but recessive in females. In females the allele B1 for nonbaldness is dominant over the gene for baldness. If a heterozygous nonbald woman marries a nonbald man, what will be the appearance of their children? Work out the possibilities for each sex. What will be an ideal response?
The order of the structural genes in the lac operon is
A) 5'-lacY-lacZ-lacA-3'. B) 3'-lacZ-lacY-lacA-5'. C) 5'-lacZ-lacY-lacA-3'. D) 3'-lacY-lacA-lacZ-5'. E) 5'-lacA-lacY-lacZ-3'.
Which of the following statements about plants grown in hydroponic culture is true?
A. They cannot be used for commercial purposes. B. They are suspended with their roots in a nutrient solution. C. They are unable to photosynthesize. D. They no longer need to transport water through their xylem. E. They rarely get enough micronutrients.