Codons are _____ of mRNA that specify different _____.
A) nuclei, DNA
B) proteins, genes
C) base triplets, amino acids
D) polypeptides, proteins
Answer: C) base triplets, amino acids
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In a karyotype, the chromosomes are arranged in order from
A. largest to smallest, including the sex chromosomes. B. largest to smallest, with the sex chromosomes at the end. C. smallest to largest, including the sex chromosomes. D. sex chromosomes first and then smallest to the largest. E. smallest to largest, with the sex chromosomes at the end.
The human immunodeficiency virus (HIV) primarily destroys which cells?
a. B b. neutrophils c. T1 d. helper T and macrophages e. suppressor T
When step "d" is completed, the two DNA molecules produced will be
a. identical to each other but not to the parent DNA. b. identical to the parent DNA but not to each other. c. different from each other and the parent DNA. d. identical to each other and to the parent DNA. e. identical to each other and almost the same as the parent DNA.
For persons with a certain types of heart defects, including artificial valves or a history of infective endocarditis, antibiotics are often prescribed prior to dental procedures to prevent possible infection. This strategy would be best described as
A) Combined antimicrobic therapy B) Synthetic therapy C) Synergy D) Prophylaxis