In the Olestra experiment conducted by researchers at the Johns Hopkins University School of Medicine, the people
who ate the Olestra potato chips were the ____.
a. experimental group
b. control group
c. research group
d. hypothetical group
e. independent group
ANSWER: a
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Multiple alleles are common because
A) RNA is an informational molecule, and many sequences are possible for a particular gene. B) proteins are informational molecules, and many amino acid sequences are possible. C) a gene sequence can vary in different ways and still encode a functional protein. D) there are many humans on the planet.
Reiji Okazaki discovered what are now called "Okazaki fragments" produced during DNA replication. These
fragments are ____.
a. short lengths of new DNA on the leading strand b. RNA primers on the lagging strand c. RNA primers on both the lagging and leading strand d. short lengths of new DNA on the lagging strand e. RNA primers on the leading strand
Which of the following statements does NOT describe prokaryotic cells?
a. They are ten times smaller than typical eukaryotic cells. b. They vastly outnumber all other types of organisms. c. They are less versatile biochemically than eukaryotes. d. They have much less internal membrane organization than eukaryotes.
The ________ is a flagellated cell that sweeps water through a sponge's body
A) choanocyte B) amoebocyte C) spicule D) spongin