The odontophore of molluscs is part of the:
a. digestive system.
b. nervous system.
c. excretory system.
d. defense system.
e. reproductive system.
A
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In bacteria, a unique RNA that binds the A site of the ribosome and directs the addition of approximately 12 amino acids to the nascent peptide when no stop codon is present is called the ________.
Fill in the blank(s) with the appropriate word(s).
You are a botanist surveying a previously unstudied island. You discover a plant that has a small freeliving
gametophyte that requires external water for fertilization. After fertilization, a large sporophyte with xylem and phloem develops. The gametophyte dies, and the free-living sporophyte eventually releases spores from sporangia on the margins of its leaves. Into which group should you classify this plant?
a. cycads b. seedless vascular plants c. gymnosperms d. angiosperms e. monocots
If an mRNA carries CUCGAU as a sequence,
what would be the complementary sequence on the DNA?
a. CTCGAT b. GUGCUA c. GTGCAT d. GAGCTA e. ACATGC
Glucagon raises blood glucose levels by:
a. stimulating the liver to take up glucose. b. inhibiting gluconeogenesis. c. stimulating glycogenolysis. d. inhibiting fatty acid mobilization. e. inhibiting amino acid mobilization.