Where does RNA polymerase begin transcribing a gene into mRNA?
A. Transfer RNA acts to translate the message to RNA polymerase.
B. It looks for the AUG start codon.
C. It starts after a certain nucleotide sequence called a promoter.
D. It starts at one end of the chromosome.
E. The ribosome directs it to the correct portion of the DNA molecule.
Ans: C. It starts after a certain nucleotide sequence called a promoter.
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When solutions of host cells and infectious virions are mixed and spread on an agar plate, ________ form where viruses lyse the host cells
A) insertion sequences B) plaques C) prophages D) colonies
The chromatids detach from one another and
become visibly separate chromosomes during a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase
Sulfolobus are archaea that are commonly found in geothermal environments, with an optimum growth temperature of about 80°C. What feature allows archaea to thrive at such temperatures?
A. Archaea are highly adaptable to changing environmental temperatures. B. Archaeal membranes contain special lipids. C. Archaea use the heat from their environment to produce ATP. D. Archaea have two cell walls that helps prevent heat absorption.
All of the following are innervated by the Maxillary Nerve (V2 of the Trigeminal Nerve, CN V), EXCEPT
A. Alae of Nose B. Bridge of Nose C. Cheeks D. Lower Eyelid E. Upper Lip