In the experiments performed on bacteriophage T4 by Francis Crick and others, in which it was shown that the genetic code was triplet, what were the researchers trying to identify?
What will be an ideal response?
They were trying to identify revertants from mutant rII to wild-type r+ phage that would have resulted from frameshift mutations due to the addition or deletion of a single base pair.
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Aphids are small insects that suck sugars from the phloem of plants. The ecological relationship between plants and aphids is:
A. mutualism. B. parasitism. C. competition. D. None of the responses is correct.
A culture of E. coli bacteria is used to establish several subcultures. Each subculture is then plated and individulal colonies that grow on the agar plates are then tested for their sensitivity to the bacteriophage T1
There is a spectrum of sensitivities where some plates have a high number of resistant colonies and some plates had very few. This data supports which theory? A. Physiological adaptation theory B. Random mutation theory C. Both theories D. Neither theory
Which of the following are common causative agents of STIs?
a. Hepatitis A virus b. Streptococcus pyogenes c. Neisseria gonorrhoeae d. HIV e. Trichomonas f. Candida albicans g. Hepatitis B virus h. Shigella
An affected father with faulty enamel trait, a sex-linked dominant trait, will pass the condition on to
a. his sons. b. half of his daughters. c. half of his sons. d. half of his daughters and half of his sons. e. all of his daughters.