When Mendel crossed true-breeding yellow seed plants with true-breeding green seed plants, the offspring were phenotypically:
A. yellow seed.
B. green seed.
C. a mixture of yellow and green seed.
D. made up of a combination of yellow and
green alleles.
A
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Which one of the following describes a tRNA molecule that specifically recognizes the codon for the amino acid histidine, but is covalently bound (charged with) to the amino acid serine?
A. histinyl-tRNASer B. histinyl-tRNAHis C. seryl-tRNASer D. seryl-tRNAHis
Which of the following is not true of telomerase function?
A. Telomerase carries a 9-base DNA template complementary to 1.5 repeat units of the telomere sequence. B. One strand of the telomere sequence is elongated 6 bp at a time. C. The telomerase repeats its reaction many times in one telomere-binding event. D. The telomeres extended 3' end is made double-stranded by lagging strand synthesis. E. The RNA template is repositioned after each extension of the 3' end.
Which of these processes is a reversal of the progression of the other three?
a. ingestion b. peristalsis c. emesis d. elimination
The figure below illustrates one possible
__________ structure of __________. a. primary; proteins b. primary; carbohydrates c. primary; lipids d. secondary; proteins e. tertiary; proteins