Pseudoephedrine, based on the chemical structure of ephedrine from the Gnetophyte genus Ephedra was used as a treatment for:
A. cancer
B. nasal blockage
C. headache
D. malaria
E. erectile dysfunction
B. nasal blockage
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In which of the following stages does each
chromosome consist of two DNA molecules? I. metaphase II. telophase III. prophase IV. anaphase
a. III and IV b. I, III, and IV c. I and III d. I, II, and III e. I, II, III, and IV
What effect does pruning flowers have on a plant?
A) The plant will make more flowers than normal. B) The new flowers that grow will be larger. C) The plant will produce more leaves. D) The plant will produce fruits instead of flowers.
The "motor unit" in vertebrate skeletal muscle refers to _____
A) one actin binding site and its myosin partner B) one sarcomere and all of its actin and myosin filaments C) one myofibril and all of its sarcomeres D) one motor neuron and all of the muscle fibers on which it has synapses
Which is mismatched?
A. plasmids - genes essential for growth and metabolism B. cytoplasm - dense, gelatinous solution C. ribosomes - protein synthesis D. inclusions - excess cell nutrients and materials E. nucleoid - hereditary material