Steroid hormomes are an example of an effector which regulates regulatory transcription factor activity
Indicate whether the statement is true or false
TRUE
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Why might an individual with an STI need to be checked for other STIs, even though he/she has no symptoms of any others?
A. Several STI-causing pathogens are known to 'piggy back' on each other, being carried into the genital tract together. B. A diagnosis of an STI implies that the individual engaged in unprotected sexual intercourse. Several STIs are largely asymptomatic, so it is wise to test for a variety of typical STIs when the patient admits to or shows signs of engaging in such risky behavior. C. They don't need to be tested-all STIs are highly obviously symptomatic, so there is no need to test for other diseases than the one currently manifesting itself in the patient. D. It's a public health issue-it's best to know who is positive for what in the population of sexually-active individuals. This lets healthcare professionals act to best safeguard the population as a whole from the range of STIs.
Catabolite repression refers to the repression of the lac operon in the presence of which catabolite?
What will be an ideal response?
The number of similarities in certain DNA or RNA nucleotide or amino acid sequences may be used as a molecular
clock to indicate how much time has passed since the groups branched from a common ancestor. ________________ Indicate whether the statement is true or false.
Which of the following statements about cellular metabolism is false?
A) Cellular metabolism includes different processes that require different conditions. B) Cellular metabolism can occur within organelles. C) Cellular metabolism occurs in animal but not plant cells. D) Cellular metabolism often occurs on the surfaces of internal membranes.