Textbook Question
For the experiment in Problem 26, another gene, g, was studied. It demonstrated positive cotransformation when tested with gene f. Predict the results of testing gene g with genes a, b, c, d, and e.
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5. Genetics of Bacteria and Viruses
Bacterial Transformation
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is the primary function of restriction enzymes in bacteria?
A
To protect the bacterial cell by cutting foreign DNA, such as that from bacteriophages
B
To facilitate the uptake of plasmids during transformation
C
To synthesize new strands of DNA during replication
D
To repair damaged regions of the bacterial chromosome
Verified step by step guidance1
Understand that restriction enzymes, also known as restriction endonucleases, are proteins produced by bacteria that recognize specific DNA sequences.
Recognize that the primary role of these enzymes is to cut DNA at or near these specific sequences, which is a defense mechanism.
Identify that bacteria use restriction enzymes to protect themselves from invading foreign DNA, such as that introduced by bacteriophages (viruses that infect bacteria).
Note that by cutting foreign DNA, restriction enzymes prevent the replication and integration of harmful genetic material into the bacterial genome.
Distinguish this function from other processes like plasmid uptake, DNA synthesis, or DNA repair, which are carried out by different proteins and enzymes.
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