What molecule is responsible for translation of the four-letter "nucleic acid language" (A, T, G, and C nucleotides) into the 20 "amino acid language" of proteins by bringing in amino acids to the ribosome?
A) Messenger RNA B) Ribosomal RNA C) Transfer RNA D) DNA
C
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Which of the following is a characteristic of temperate forests?
a. being dominated by deciduous trees b. having significant tree species diversity c. having shrubs that adapt to occasional fires d. being shaded mostly by evergreen conifers
Fragile X syndrome is a human disease caused by a trinucleotide repeat expansion that results in loss-of-function of the FMR1 gene on the X chromosome. An animal model with most features of this syndrome could be created by
A) adding a transgene containing a mutant copy of the FMR1 gene to a mouse or primate genome. B) adding a transgene containing a wild-type copy of the FMR1 gene to a mouse or primate genome. C) knocking out both copies of the FMR1 gene from a mouse or primate genome. D) knocking out one copy of the FMR1 gene from a mouse or primate genome.
What is the ultimate source of genetic variation in populations?
What will be an ideal response?
What can best be defined as a contest between two species for limited resources?
a) competition b) transition c) predation d) parasitism