The bases of RNA are the same as those of DNA with the exception that RNA contains
A. cysteine instead of cytosine.
B. cytosine instead of guanine.
C. uracil instead of adenine.
D. uracil instead of thymine.
Answer: D
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In pea plants, flowers are either white or purple; the purple color is produced by pigments called anthocyanins. The production of anthocyanins is a two-step process; the first is controlled by the C gene and the second by the P gene
Both genes must produce functional proteins for anthocyanin to be produced. For each gene, the dominant (C and P) alleles produce functional proteins. You cross two pea plants, each with the genotype CcPp. What proportion of their offspring will have white flowers? A. 13/16 B. 9/16 C. 7/16 D. 3/4 E. 1/4
Which of the following is NOT found in every
nucleotide? a. ribose b. a phosphate group c. a single-ring base d. a double-ring base e. nitrogen
What does this figure suggest is responsible for increasing species diversity?
A) time alone B) increasing leaf litter C) decreasing leaf litter D) increase in agriculture
Which of the following is transmitted by the fecal-oral route?
A) Entamoeba histolytica B) Plasmodium C) Schistosoma D) Trichomonas E) Schistosoma and Trichomonas