The tryptophan codons of the attenuator sequence help speed up transcription of downstream trp genes at high concentrations of tryptophan
Indicate whether the statement is true or false
FALSE
Explanation: These codons are readily read by trp-tRNA at high tryptophan concentrations, leading to the attenuator formation that terminates transcription.
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The striated muscles in most invertebrates have thick and thin filaments arranged in sarcomeres
entirely similar to those of vertebrates.
Indicate whether the statement is true or false.Mendel's principle of segregation states that:a
alleles from one parent mask the expression of alleles from the other parent. b. alleles separate from each other before forming gametes. c. hybrids will express a phenotype intermediate between the two parental phenotypes. d. true-breeding parents produce offspring of the same phenotype. e. dominant and recessive alleles segregate during meiosis.
Which type of immunoglobulin molecule is passed on to nursing infants in breast milk?
A. IgG. B. IgM. C. IgA. D. IgE.
Human tapeworm infections occur by
A. ingesting eggs in contaminated water. B. eating insufficiently cooked infected pork or beef. C. eating freshly peeled fruit. D. being bitten by a mosquito. E. All of the choices are correct.