Which of these trends occurred first in hominid evolution?
A) bipedalism B) tool use C) large brain D) writing
Answer: A
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Although Watson and Crick are credited with the discovery of the structure of DNA, they based this
discovery on the bench work of many other scientists of the time. Name at least three different pieces of knowledge that Watson and Crick used in their discovery that was based on work from someone else.
What will be an ideal response?Which of the following tubes would you expect to have a higher MPN after subculture?
A) BGB broth tube B) EC broth tube
What is the function of bactoprenol?
A) It is a hydrophobic alcohol that transports peptidoglycan precursors across the cytoplasmic membrane. B) It is responsible for forming the peptide cross-links between muramic acid residues in adjacent glycan chains. C) It triggers the recruitment of FtsZ and the initiation of the divisome. D) It supplies the energy necessary for transpeptidation to occur.
How can specialized transduction contribute to the transfer of antibiotic resistance genes in a bacterial population?
a. The prophage takes an antibiotic resistance gene with it and is packaged with the newly synthesized viral DNA. b. The phage lyses the bacterium and releases resistance genes into the local environment, which can then be taken up by recipient cells. c. The phage causes the destruction of any antibiotic present during the specialized transduction process.