What happens during RNA splicing in eukaryotes?
A. The product of transcription, called the primary transcript, is cut and some pieces are joined back together to form the mature tRNA.
B. The product of transcription, called the secondary transcript, is cut and some pieces are joined back together to form the mature mRNA.
C. The product of transcription, called the primary transcript, is cut and some pieces are joined back together to form the mature mRNA.
D. The product of transcription, called the primary transcript, is cut and all pieces are joined back together to form the mature mRNA.
E. The product of translation, called the primary transcript, is cut and some pieces are joined back together to form the mature mRNA.
Answer: C
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A plant has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are being absorbed by this pigment?
A) red and yellow B) blue and violet C) green and yellow D) blue, green, and red E) green, blue, and yellow
A scientist is studying the lysogenic cycle of the lambda 1 phage of Escherichia coli. This means that she is investigating
A. the integration of the viral genome into the ribosomes present in the bacteria to direct protein synthesis for the capsid formation. B. the integration and stabilizing of a virus into its capsid, which provides protection until conditions are better for reproduction. C. the integration of the bacteria's genome with the viral genome outside of the bacteria's cell wall. D. the integration and stabilizing of the lambda 1 phase into a host cell's genome.
Which four elements make up approximately 96% of living matter?
A) Carbon, oxygen, calcium, sulfur B) Carbon, hydrogen, nitrogen, oxygen C) Oxygen, hydrogen, calcium, sodium D) Carbon, phosphorus, hydrogen, sulfur E) Carbon, sodium, chlorine, magnesium
To determine the evolutionary history of a gene, geneticists assume that the most prevalent alleles in a population
A) are dominant. B) have mutated the most. C) are the oldest. D) are the most recently acquired.