Pairs of chromosomes that are similar in size and genetic composition are
a. chromatids.
b. diploid.
c. haploid.
d. chromatin.
e. homologous chromosomes.
E
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Soaps are classified as disinfectants
a. true b. false
The antibiotics streptomycin and erythromycin work by inhibiting the function of ____ in bacteria but not eukaryotes
a. RNA polymerases b. aminoacyl-tRNA synthetases c. spliceosomes d. DNA polymerases e. ribosomes
Which phrase best describes chromosomal nondisjunction?
a. failure of homologous pairs or sister chromatids to separate during meiosis b. failure of sister chromatids to pair during mitosis c. improper pairing of nonhomologous chromosomes during meiosis d. failure of homologous pairs to separate during meiosis
Which of the following is NOT a characteristic of cellular immunity?
A) The cells originate in bone marrow. B) Cells are processed in the thymus gland. C) It can inhibit the immune response. D) B cells make antibodies. E) T cells react with antigens.