Which of these carry incoming messages toward the cell body of a neuron?
A) axons
B) dendrites
C) actin filaments
D) supporting cells
B
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Red blood cells, also known as __________, contain the hemoglobin that functions in rapid transport
of oxygen and, to a lesser extent, carbon dioxide.
A certain organism has a mutation in the shelterin gene that makes it non-functional. Which of the follow consequence would you expect from this mutation?
a) Nucleosomes would not be formed so DNA can not be compacted as tightly. b) Epigenetic control would not be possible. c) The phosphodiester bonds between nucleotides would not be formed. d) DNA could not be repaired if it underwent damage. e) The telomere overhand region would become accidentally repaired, thus lengthening the chromosomes unintentionally.
Genetic variability in sexually reproducing organisms arises within
A) crossover events between nonsister chromatids. B) crossover events between sister chromatids. C) egg and sperm genetic recombination from distinct individuals. D) egg and sperm genetic recombination from an individual. E) both choices B and C
A researcher wants to insert a DNA fragment into a plasmid. Which enzyme will join the two DNA molecules
together?
a. primase b. ?-galactosidase c. restriction endonuclease d. DNA ligase e. DNA polymerase