If a codon has the sequence CAG, tRNA with which anticodon will bind to it?
A) GTC B) CAG C) GUC D) UGA E) CTG
Answer: C
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In some rocky intertidal habitats, the barnacle Chthamalus can survive across the same depths as can the barnacle Balanus
However, where the two occur together, Chthamalus adults are found only in the more stressful upper portions of the habitat where they are more prone to desiccation. This is an example of: A. the mutualistic form of symbiosis. B. intraspecific competition reducing the size of Chthamalus' fundamental niche to a smaller realized niche. C. mutualism reducing the size of Balanus' realized niche to a smaller fundamental niche. D. competitive exclusion reducing the size of Chthamalus' fundamental niche to a smaller realized niche. E. competitive exclusion expanding the size of Balanus' realized niche to a larger fundamental niche.
During prophase I, each chiasma represents:a
the remnants of the nuclear membrane. b. the remnant of the nucleolus. c. a newly formed haploid gamete. d. a site of crossing-over. e. the site where sister chromatids are connected
A plant is treated with a chemical that blocks the flow of electrons between photosystem II and photosystem I, such that protons are not transported from the stroma into the thylakoid compartment. What is the effect of this chemical on photosynthesis?
A. a decreased proton gradient will cause less ATP to be produced from the light reactions. B. the increased number of protons will be directly used in the thylakoid to produce glucose. C. an increased proton gradient will provide the energy needed to produce ATP from the light reactions. D. the increased proton gradient will be used to make NADPH for the Calvin cycle.
Alternative forms of a gene (producing differences in the trait) are called
What will be an ideal response?