Which of the following statements describes Neanderthals?
A. They are also called Cro-Magnons for the
site where they were first discovered.
B. They are believed to have given rise to
Homo sapiens.
C. They were the first bipedal hominins
discovered.
D. They are a separate species that is closely
related to Homo sapiens.
D
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A first exposure to an allergen is likely to activate ________ to make and secrete ________
a. B cells, IgG b. T cells, IgA c. B cells, IgA d. T cells, IgE e. B cells, IgE
In the unlikely event that a tRNA has been charged with the wrong amino acid, what high-fidelity enzyme is likely to blame?
A) peptidyl transferase B) DNA polymerase I C) DNA polymerase III D) aminoacyl synthetase E) aminoacyl peptidase
Choose the answer that correctly completes the statement:
In deoxyribonucleotides, the pyrimidines are bound to the 1' carbon of pentose sugar by a ____________¬¬_ to _____________of the base. A. glycosidic bond; N-1 B. glycosidic bond; N-9 C. hydrogen bond; N-1 D. phosphodiester bond; N-3 E. glycosidic bond; N-3
A bacterium possessing a tuft of flagella at one end of its cell would be called what kind of bacterium?
A) amphitrichous B) lophotrichous C) monotrichous D) peritrichous