An enhancer is a sequence that increases transcription of a gene ____
a. when its orientation is the same as that of the gene it controls
b. when it is located just downstream of the promoter
c. when it is located just upstream of the promoter
d. when it is distant from the gene it controls
e. independently of its position, orientation, and distance from a promoter
ANSWER: e
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What information cannot be determined from the DNA sequence of a cDNA clone?
A) exon sequences B) sequence of the promoter C) similarity to previously identified sequences D) amino acid sequence of the encoded polypeptides E) sequence of the spliced mRNA transcript
A cherry blossom has all four sets of modified leaves (sepals, petals, stamens, and carpels), so it is called a
__________ flower. Fill in the blank(s) with the appropriate word(s).
Which is the most recent plant adaptation to have evolved?
A) Seeds B) Vascular system C) Flowers D) Cones
A population:
a. is the unit of evolution b. consists of interbreeding members of the same species c. shares the same gene pool d. grows at an exponential rate when the birth rate exceeds the death rate at a constant differential, no matter how slight the difference. e. all of the above