In spliceosome-mediated pre-mRNA splicing:
A. U2 snRNA basepairs to both sides of the of the splice junction.
B. U2 and U6 snRNAs basepair during the two transesterification reactions.
C. U6 snRNA basepairs to the 3' end of the intron.
D. U5 snRNA basepairs to the 3' end of the intron.
B
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Maternal-effect genes:
A. are expressed by the mother. B. affect maternal phenotype. C. affect offspring phenotype. D. are expressed by the mother and affect maternal phenotype. E. are expressed by the mother and affect offspring phenotype.
Which of the following characteristics of DNA-dependent DNA synthesis is not the same for
DNA-dependent RNA synthesis? A. Synthesis requires a template. B. Initiation involves the recognition of a specific DNA sequence. C. Initiation of synthesis requires a primer. D. Synthesis is catalyzed in the 5' to 3' direction. E. All of the choices given are the same for both DNA and RNA synthesis.
In radishes, two incompletely dominant genes control color and shape. Red and white radishes are
homozygous, while the hybrid is purple. Long and round are homozygous and, if crossed, will produce an oval hybrid. Give the F2 genotypic and phenotypic ratio produced by crossing pure-breed red and long radishes with white and round varieties. What will be an ideal response?
The American kangaroo rat is characteristic of the desert biome
____________________ Indicate whether the statement is true or false.