Review the ABC model for flower development in Arabidopsis shown below. If additional B activity was expressed in all four whorls, what floral organs would develop from each whorl?
A. whorl 1: sepals; whorl 2: petals; whorl 3:
stamens; whorl 4: carpels
B. whorl 1: carpels; whorl 2: stamens; whorl
3: stamens; whorl 4: carpels
C. whorl 1: petals; whorl 2: petals; whorl 3:
stamens; whorl 4: stamens
D. whorl 1: sepals; whorl 2: sepals; whorl 3:
carpels; whorl 4: carpels
E. whorl 1: sepals; whorl 2: petals; whorl 3:
petals; whorl 4: sepals
C
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Which of the following is NOT a common step in creating a genomic library?
A) Fragment DNA into small segments. B) Hybridize DNA sequences to form inserts of a target size range. C) Ligate DNA into vectors. D) Transform the vectors into a host.
The "charging" or activation of a tRNA molecule includes:
A. the covalent attachment of an amino acid to the 3'-terminal cytosine of the tRNA. B. the covalent attachment of the amino group of an amino acid to the tRNA. C. the covalent attachment of the carboxyl group of an amino acid to the tRNA. D. the covalent attachment of an amino acid to the 5'-terminal adenosine of the tRNA.
Viruses can be used to identify bacteria because of viral specificity for a host cell. This identification method is called ________.
A. ELISA B. immunochromatography C. phage typing D. probing
According to this plot, how are growth rate and doubling time related?
A) directly proportional B) inversely proportional C) not related to one another D) equally proportional to one another