Which of the following is a process in translation in which tRNA molecules deliver amino acids in the correct sequence, causing peptide bonds to form and increasing the length of the polypeptide chain?
A) initiation
B) elongation
C) termination
D) transcription
B
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Some protists use multiple fission (cell division preceded by several nuclear divisions) as a means of reproduction. Multiple fission is also referred to as
A. budding. B. zygotic meiosis. C. schizogony. D. syngamy. E. intermediary meiosis.
In eukaryotic cells, sequences of mRNA removed before translation are called
A. introns. B. anticodons. C. exons. D. rRNA. E. terminators.
A DNA fingerprint of a suspect doesn't match a DNA fingerprint from a blood sample taken at a crime scene. What can you conclude?
A) The suspect was never at the crime scene. B) The blood sample was probably degraded or destroyed in some way. C) There is no DNA in a blood sample. D) The blood came from a different person, but the suspect may have been there.
Infection with some Salmonella enterica serotypes can progress to typhoid fever when the bacteria
A) attach to cells of the small intestine. B) induce endocytosis by intestinal cells. C) reproduce within cells of the small intestine. D) produce type III secretion system proteins. E) enter the blood and are engulfed by phagocytes.