The virulence factors of a pathogen are established by how strong or weak a patient's body defenses are at the time of infection.
Answer the following statement true (T) or false (F)
False
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Answer the question using the accompanying figure. Which letter represents the littoral zone?
a. A only b. B only c. C only d. A and B e. B and C
Match the terms with the best description. _____ base pair substitution _____ promoter _____ polysome _____ exon _____ genetic code _____ intron _____ base pair deletion
a. protein-coding segment b. causes a shift in the mRNA reading frame c. may result in the replacement of one amino acid for another d. removed before translation e. many ribosomes translating the same mRNA f. complete set of 64 codons g. binding site for RNA polymerase
Suppose an individual is heterozygous for alternate alleles of gene A (Aa). Under what conditions would a crossover in a somatic cell of this individual lead to a clone of cells that are homozygous for a? (Pick the most precise answer.)
A) The crossover would have to occur between the A locus and the centromere and involve two homologous (nonsister) chromatids. B) The crossover would have to occur between the A locus and the end of the chromosome and involve two homologous (nonsister) chromatids. C) The crossover would have to occur between the A locus and the end of the chromosome and involve two nonhomologous chromosomes. D) The crossover would have to occur between the A locus and the centromere and involve two sister chromatids.
Light reactions use ATP as energy source The light reactions use ATP as the energy source.
a. true b. false