A bacterium's large subunit is 60S and its small subunit is 40S. What is the size of the ribosome containing both subunits?
A) 70S B) 100S C) 20S D) 80S E) 120S
Answer: D
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The growth of viruses in a culture is described as a one-step growth curve, because
A) virion numbers show no increase during intracellular replication and can only be counted after the virions burst from the host cell. B) there is only one step in the viral life cycle which leads to only one replicative cycle in a culture. C) assembly and release actually occur in one step. D) the eclipse phase prevents the plating and enumeration of virions although new virions are produced at a steady rate during the eclipse phase.
Suppose you count 40 green tobacco seedlings and 2 white tobacco seedlings in one agar plate. Do your results show that both parent plants were heterozygous for the allele?
What will be an ideal response?
What are the predicted phenotypes of the female children from the union of a woman who is heterozygous for
hemophilia and a man who has normal blood clotting characteristics? (Use the Punnett square to verify your answer.) a. all carriers b. 3 homozygous normal : 1 carrier c. 1 homozygous normal : 1 carrier
d. 1 hemophilia: 2 homozygous; normal : 1 carrier e. all hemophiliacs
The sequencing method that cuts DNA segments into fragments, arranges those fragments based on overlapping nucleotide sequences, and then clones these fragments is called
A. RFLP sequencing. B. shotgun sequencing. C. clone-by-clone sequencing. D. consensus sequencing.