Virulence refers to the ability of an organism to cause disease
Indicate whether the statement is true or false.
Answer: FALSE
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Organisms that require increased pressure for optimum growth are called
A. osmotolerant. B. osmophilic. C. barotolerant. D. barophilic.
Which one of the following is a key advantage that eukaryotic cells have over prokaryotic cells?
A. Eukaryotic cells have a cell membrane, which allows them to ship materials into and out of the cell. B. Eukaryotic cells have ribosomes, which allow them to make more complex proteins. C. Eukaryotic cells have a flexible cytoskeleton, which allows them to change shape and gives them the ability to engulf other materials. D. Eukaryotic cells have a rigid cytoskeleton, which allows them to withstand greater stress. E. None of the answers options is correct.
During the elongation step of translation, ____
a. the small ribosomal subunit pairs with an anticodon b. amino acids are added to a growing polypeptide chain c. methionine is inserted at the beginning of all proteins d. mRNA is transformed into tRNA e. release factors bind to stop codons
A frameshift mutation:
A) leaves the amino acid sequence unchanged. B) results from an insertion or deletion in a DNA sequence. C) substitutes a pyrimidine for a purine, or vice versa. D) substitutes a purine for a pyrimidine only. E) is the result of an unequal crossing-over.