Many errors made during DNA replication are corrected during DNA replication through proofreading by ____.
a. DNA polymerase
b. primase
c. telomerase
d. DNA ligase
e. helicase
A
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A desert plant called Kalanchoe can reproduce, either with sexual reproduction through flowers, or asexually by budding off miniature leaf and root clusters from its leaves. When buds are produced, they land on the ground, take root, and grow, genetically identical to the original. If budding is used for several years, a large area may be covered with these descendents from the same original plant. The resulting population of plants will
A. automatically experience more genetic mutations, so that some of the plants will survive environmental change. B. None of the answer choices is correct. C. be more strongly able to adapt to environmental change, compared to the Kalanchoe that are reproducing sexually. D. not be as strongly able to adapt to environmental change, compared to the Kalanchoe that are reproducing sexually. E. adapt to environmental change, by shifting from asexual budding to conjugation, so they can sexually reproduce.
The largest bone in the body is the
a. femur. b. humerus. c. tibia. d. fibula. e. hipbone.
Which stage of cellular respiration requires oxygen that you breathe?
A) Glycolysis B) Citric acid cycle C) Electron transport chain D) All of the above
What is a codon?
A) a segment of a chromosome that encodes an RNA B) three genes in a bacterium that are all regulated together C) three amino acids in a row in a protein D) a three-base sequence of mRNA that codes for a specific amino acid E) a sequence in DNA that is the binding site for RNA polymerase