DNA replication in eukaryotes is sped up by multiple origins of replication.
a. true
b. false
Answer: a. true
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If both parents are "carriers" due to the presence of one copy of the recessive allele responsible for the trait being studied, what are the odds that they would have a normal child?
a. 0 b. 25% c. 50% d. 75% e. 100%
Birds are the only modern amniotes with ____
a. wings b. feathers c. a four-chambered heart d. ectothermic metabolism e. more than one of these
In a marine ecosystem with an inverted biomass pyramid, which trophic level should have the smallest number of organisms?
A. phytoplankton B. zooplankton C. primary carnivores (sardines) D. secondary carnivores (tuna) E. detritivores
Which PCR step synthesizes complementary DNA strands?
A. Cool DNA to between 50°C and 65°C. B. Add primers. C. Repeat the cycle of heating and cooling. D. Add DNA polymerase and nucleotides at 72°C. E. Heat target DNA to 94°C.