A particular mRNA is 300 nucleotides long. If a mutation in the middle of the sequence changed a codon from a AAA to a UAA then what would be a reasonable prediction?
A) The protein coded by this mRNA would be the same size.
B) The protein coded by this mRNA would be longer.
C) The protein coded by this mRNA would be shorter.
D) The protein coded by this mRNA would not form due to a failure in initiation.
E) The protein coded by this mRNA would kill the cell.
Answer: C
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In models of logistic population growth, _____
A) the population growth rate slows dramatically as N approaches K B) new individuals are added to the population most rapidly at the beginning of the population's growth C) new individuals are added to the population as N approaches K D) only density-dependent factors affect the rate of population growth E) carrying capacity is never reached
Members of which fungal phylum are also called sac fungi?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
An organ is defined as
a. a single tissue grouped together to perform a specific function. b. 2 or more tissues in specific proportions grouped together to perform a specific function. c. cells of different tissues linked together by the circulatory system to allow multiple functions. d. only the reproductive parts in plants. e. none of these.
A virus reproduces by
A. laying eggs in a host cell. B. taking control of a host cell and directing it to produce viral components. C. the exchange of gametes. D. binary fission.