________ attaches DNA sequences at the ends of eukaryotic chromosomes.
A. Polymerase
B. Ligase
C. Telomerase
D. Topoisomerase
E. Primase
C. Telomerase
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The building blocks which animals need for life include
A. sugars. B. nucleotides. C. fatty acids. D. amino acids. E. All of the answer choices are correct.
On the outer surface of the plasma membrane there are marker molecules that identify the cell type. Often these molecules are
A. amino acids. B. carbohydrate chains. C. nucleotides. D. ATP. E. inorganic ions.
The most commonly occurring mutation in people with cystic fibrosis is a deletion of a single codon. This results in _____
A) a base-pair substitution B) a frameshift mutation C) a polypeptide missing an amino acid D) a nonsense mutation
What mechanism of reproduction is most common in bacteria?
a. sexual reproduction: binary fission b. asexual reproduction: binary fission c. asexual reproduction: budding d. sexual reproduction: meiosis