Explain the difference between an intrinsic terminator and a Rho-dependent termination site
What will be an ideal response?
Answer: Intrinsic terminators occur at the nucleotide (DNA) level and require no additional protein involvement. They can develop into secondary structures such as loops, which freely form through base pairing with itself to ultimately halt transcription of RNA. Rho-dependent termination also stops RNA transcription but requires the protein Rho, which interacts with the DNA template-RNA polymerase complex to dissociate the complex at specific nucleotide sequences.
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Proteins and RNA molecules that are needed in the cell, at about the same level under all growth conditions, require constitutive expression
Indicate whether the statement is true or false.
When added to water at neutral pH (7.0), an acid will ____
a. act as a proton donor, raising the pH of the solution b. act as a proton acceptor, raising the pH of the solution c. act as a proton donor, lowering the pH of the solution d. act as a proton acceptor, lowering the pH of the solution e. do nothing since the aqueous solution is neutral
The "tunic" of tunicate refers to:
a. a body covering b. the type of food-gathering mechanism c. muscle arrangements in the larva d. the immature stage of a true fish e. the protective cover of the brain
Which of the following is associated with dental caries?
A. Lactococcus lactis B. Streptococcus mutans C. Enterococcus faecalis D. Streptococcus pneumoniae