In some organisms, a normal stop codon, UGA, encodes for the amino acid ________.

A) leucine
B) arginine
C) isoleucine
D) selenocysteine
E) pyrrolysine


D) selenocysteine

Biology & Microbiology

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Which of the following is sometimes useful against viral infections?

A. Zidovudine B. Rifampin C. Trimethoprim D. Streptomycin

Biology & Microbiology

Which STD is characterized by a foul-smelling, yellow-green frothy discharge and itching of the vulva/vagina?

A. yeast infection B. genital warts C. gonorrhea D. genital herpes E. trichomoniasis

Biology & Microbiology

During aerobic respiration, H2O is formed. Where does the oxygen atom for the formation of the water come from?

A) carbon dioxide (CO2) B) glucose (C6H12O6) C) molecular oxygen (O2) D) pyruvate (C3H3O3-)

Biology & Microbiology

The two populations are _____

A) different subspecies, under the morphological species concept B) different species, under the biological species concept C) different species, under the phylogenetic species concept

Biology & Microbiology