How long does it take for the daughter cells from one round of replication to replicate themselves?
a. 20 minutes
b. No time is required -- they are ready to divide immediately after DNA replication and separation of the daughter cells is complete if conditions are right.
c. After the cells have matured fully.
d. No time is needed -- the daughter cells cannot replicate further.
Answer: b. No time is required -- they are ready to divide immediately after DNA replication and separation of the daughter cells is complete if conditions are right.
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Neurons may be classified by their morphology (shape). Alpha motor neurons consist of 1 axon with many dendritic trees. Which type of morphology does this describe?
a. Multipolar b. Bipolar c. Pseudounipolar d. Interneuron
Which of the following would be considered a
type of eugenics?
a. gene therapy to cure a disease b. gene replacement to improve normal memory c. xenotransplantation of a healthy organ d. consumption of genetically enhanced foods e. more than one of these would be considered a type of eugenics
Why is it unlikely that genetically engineered strains of bacteria would pose a threat to the
environment? a. Genetically engineered bacteria cannot survive exposure to UV radiation. b. Genetically engineered strains of bacteria are strictly regulated, making accidental release unlikely. c. Genetically engineered strains of bacteria cannot survive exposure to oxygen. d. Genetically engineered strains of bacteria are poor competitors of wild strains. e. Genetically engineered strains of bacteria require supplemental nutrients to survive.
During elongation, a charged tRNA first enters the ribosomal ________ site and then moves into the ________ site
A) A; E B) P; A C) P; E D) A; P E) E; A