Signals that stimulate the release of hormone
molecules are carried along
a. A.
b. B.
c. C.
d. D.
e. E.
B
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Which one of the following nucleotides could base pair with a pyrimidine?
A. uracil B. cytosine C. adenine D. thymine E. uracil, cytosine, adenine and thymine
If the side chains of amino acids contain the ammonium ion, they readily form ions that
A. are described as acidic amino acids. B. give positive electric charges to the amino acid. C. are described as basic amino acids. D. react with lipids to form lipoproteins. E. give positive electric charges to the amino acid AND are described as basic amino acids.
Which one of the following is a human blood type?
A) E+ B) B- C) ABO- D) Rh E) Rh+
Which group would be an ecological population of organisms?
A) all chipmunks in a wood lot B) all plants in a garden C) all animals in a zoo D) all plants and animals in a rainforest