During transcription, the sequence of one strand of a DNA molecule is copied into a related molecule, known as a
A) gene.
B) messenger RNA.
C) protein.
D) genome.
B) messenger RNA.
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What kingdoms composed the three kingdom classification system used by scientists in the late 1800s?
a. animals, plants, fungi b. animals, plants, bacteria c. animals, fungi, protists d. animals, plants, protists
Which one of the following is not required for a plant to grow and reproduce?
A. hydrogen peroxide B. carbon dioxide C. water D. light E. basic nutrients
Why must the life cycle of sexually reproducing species alternate between haploid and diploid stages?
A. Meiosis must occur at some point in the life cycle to prevent a doubling of chromosomes in each generation. B. Mitosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation. C. The diploid stage allows for genetic recombination. D. Meiosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation. E. Haploid cells cannot grow independently of diploid cells.
A thin filament of muscle is composed primarily of the protein
A. hemoglobin. B. myosin. C. myoglobin. D. actin. E. pectin.