16. Gene transfer that requires cell-to-cell cont A. transformation. B. transduc
ID: 203680 • Letter: 1
Question
16. Gene transfer that requires cell-to-cell cont A. transformation. B. transduction. C. conjugation D. functional genomics. act is 17. All the bacterial cells that result from the replicat A population,ealcels that result from the replication of a single organism are said to be a B. pure culture. C. lag culture. D. mutant culture. 18. The scientist that A. Alexander Fleming. B. Louis Pasteur. C. Edward Jenner D. Robert Koch. E. Francesco Redi contributed most to the development of pure culture techniques was to 19. Whi ch of the following is not true of bacterial plasmids? A. They can replicate independently of the chromosome. B. They may carry genes for drug resistance. C. They are required for host growth and/or reproduction D. They may carry genes that enhance survival of the bacterium under certain conditions 20. The term used to describe bacteria that are shaped like curved rods is A. coccus. B. bacillus. C. vibrio D. coccobacillus. 21. A mutation does not alter the amino acid sequence of the resulting protein. A. missense B. nonsense C. silent/latent D. none of the choices 22. A mutation that results in a change in the amino acid sequence of the resulting protein by substitutio called a A. missense B. nonsense C. silent D. Frame shift mutation 23. The presence of capsule in bacteria A. may be used to resist phagocytosis B. may be used to help the bacteria adhere to surfaces. C. may be involved in movement D. may be involved in energy production E. may be used to resist phagocytosis AND may be used to help the bacteria adhere to surfaces.Explanation / Answer
Answer 16
Conjugation requires cell to cell contact during gene transfer. It is a method of reproduction in bacteria which brings variations in bacteria by exchanging genetic material. Sex pilus from donor cell make contact with recipient cell and gene transfer occurs through pilus.
Answer 17
Pure culture contains cell that arise from a replication of single cell.
Answer 18
Robert Koch
Answer 19
They are required for host growth and/or reproduction is correct option.
Because there is no significant role of plasmid in growth and reproduction in bacteria.
Answer 20
Vibrio is the term used for bacteria which are curved rod like in shape.
Answer 21
Silent/latent mutation doesnot alter the amino acid sequence of resulting protein because new codon formed after mutation codes for same amino acid.
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