In a bacterial cross of an Hfr donor a+b+ with a recipient F– a–b–, what would be a possible recombinant?
What will be an ideal response?
a+b– or a–b+
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Penicillin-binding proteins
A. primarily function in the cell to bind to beta-lactam drugs. B. are enzymes. C. are involved in cell wall synthesis. D. inhibit non-growing bacteria. E. are enzymes AND are involved in cell wall synthesis.
What tissue type produces the tough coverings that package organs?
A. loose connective tissue B. dense irregular connective tissue C. collagen D. dense regular connective tissue E. adipose
The ribosome binding site in an mRNA transcript is located ____ and is where ____
a. at the start codon; the large ribosomal subunit binds to the mRNA-tRNA complex in prokaryotes b. just upstream of the start codon; the large ribosomal subunit binds to mRNA in eukaryotes c. at the start codon; the small ribosomal subunit binds to the mRNA-tRNA complex in eukaryotes d. on aminoacyl-tRNA; the large ribosomal subunit binds to tRNA in prokaryotes e. just upstream of the start codon; the small ribosomal subunit binds to mRNA in prokaryotes
Among the common features shared by prokaryotes and eukaryotes are
a. the same types of movement b. the same shapes and sizes c. ribosomes of the same weight d. common organic molecules such as proteins and carbohydrates