Bacterial cells that are not competent a. do not exist b. cannot be transformed

Question

Bacterial cells that are not competent a. do not exist b. cannot be transformed c. bind single-stranded DNA d. are ready for transformation Transformation involves a. a process that requires the enzyme DNase b. the uptake of free DNA by a bacterial cell c. the transfer of DNA that requires a sex pilus d. processes that can only occur when bacteria are growing within a living animal Insertion of a G to a segment of a gene that codes for three amino acids a. causes a silent mutation b. causes a back mutation c. causes a frameshift mutation d. will have no effect on the gene or its information Metabolism of glucose usually begins with a. oxidative phosphorylation b. fermentation c. cellular respiration d. glycolysis The glycolytic products of glucose a. enter the ETS b. may enter either the Krebs cycle or a fermentation reaction c. always enter the Krebs cycle d. cannot be metabolized further Glucose is converted to _____ in order to enter the Krebs cycle a. glucose-6 phosphate b. citric acid c. pyruvate d. acetyl-CoA What is the function of a vector in biotechnology? a. destroys cells that do not contain cloned DNA b. allows cells to take up foreign DNA c. carries cloned DNA, enabling it to replicate in cells d. encodes herbicide resistance Enzymes that are constantly synthesized in prokaryotic cells a. inducible enzymes b. repressible enzymes c. constitutive enzymes d. none of these All of the following are directly involved in DNA replication, except a. elongation factors b. gyrase c. primase d. DNA polymerase Immunity produced when an infant consumes colostrum a. natural passive b. artificial passive c. artificial active d. natural active

Explanation / Answer

71)d. are ready for transformation.

72)b. the uptake of free DNA by bacteria cell.

73)c.causes a frameshift mutation.

74)d.glycolysis.

75)a. enter the ETS fermentation reaction

76)a. glucose-6- phosphate

77)b.allows cell to take up foreign DNA

78)a.inductive enzymes

79)b.gyrase

80)a. natural passive

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