Which sequence of events CORRECTLY describes the initiation and elongation steps of translation in prokaryotic cells?
(1) initiator tRNA binds start codon on mRNA
(2) small ribosomal subunit binds to mRNA
(3) large ribosomal subunit binds
(4) tRNA entry and peptidyl transfer reaction
(5) translocation of ribosome and release of tRNA
A. 1, 2, 3, 4, 5
B. 1, 2, 3, 5, 4
C. 1, 3, 2, 4, 5
D. 2, 3, 1, 5, 4
E. 2, 1, 3, 4, 5
E. 2, 1, 3, 4, 5
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Cladograms include in the phylogenetic tree shared primitive characters and shared derived characters. The derived characters can also be called ______ while the primitive characters can also be called __________.
A. character states; symplesiomorphy B. symplesiomorphy; ingroup C. outgroup; synapomorphy D. synapomorphy; outgroup E. synapomorphy; symplesiomorphy
Brittle stars are members of the class ____ of the phylum Echinodermata
a. Asteroidea b. Ophiuroidea c. Echinoidea d. Holothuroidea e. Crinoidea.
Mendel referred to the expressed trait in the F1 generation as _____. The unexpressed trait in the F1 generation was referred to as _____. For example, the purple flowering trait is dominant and the white flowering trait is recessive.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about the types and subtypes of the influenza (flu) virus is FALSE?
A. Flu subtype is determined by the kinds of proteins representing the H and N protein spikes making up the capsid of the virus. B. The A(H2N2) and the A(H3N2) strains of the virus require different vaccines. C. Of the three major types of flu virus (A, B, and C), only Type A can occur in humans, other mammals, and birds. D. High mutation rates create more diversity in strains of flu than does genetic recombination. E. Genetic recombination between influenza and other types of viruses is common.