In nonsense-mediated decay, how is a premature termination codon distinguished from the normal termination codon?
What will be an ideal response?
Ans: A premature termination codon will have a downstream exon junction complex (EJC) marking the position at which an intron had been spliced out. The normal termination codon will be at the end of the last exon and will have no downstream EJC. Additionally, the termination codon can be recognized as premature if the 3? UTR is recognized as being abnormally long.
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a. environmental adaptations and morphology b. genetic data and environmental adaptations
c. morphology and environmental adaptations d. morphology and genetic data e. species response to adverse conditions and genetic data
Which of the following phrases is used to describe J. B. Lamarck's hypothesis of evolutionary change?
a. inheritance of ancestral identity b. inheritance of acquired characteristics c. natural selection d. survival of the fittest e. intelligent design
Signals from motor neurons result in action
potentials in muscle fibers, which in turn causes the __________ to release stored calcium ions. Fill in the blank(s) with the appropriate word(s).
The sperm in the figure below were most likely produced by:
a. nondisjunction.
b. mutation.
c. X-linkage.
d. translocation.
e. normal meiosis.