A good plasmid for gene cloning will
have genes that make it easily detectable
or
have multiple sites that correspond to a particular restriction enzyme
or
be small enough to pass easily through a pilus during bacterial conjugation.
or
have more base pairs than a normal bacterial chromosome.
To determine which of the options provided is a good plasmid for gene cloning, let's analyze each option:
1. "Have genes that make it easily detectable": This is a valid characteristic of a good plasmid for gene cloning. By having genes that make it easily detectable, researchers can confirm the successful insertion of the gene of interest into the plasmid.
2. "Have multiple sites that correspond to a particular restriction enzyme": This is another desirable feature of a good cloning plasmid. Multiple restriction sites allow for flexibility in inserting the gene of interest into the plasmid using specific restriction enzymes.
3. "Be small enough to pass easily through a pilus during bacterial conjugation": While plasmids need to be able to transfer between bacterial cells during conjugation, the size of the plasmid is not the deciding factor in this process.
4. "Have more base pairs than a normal bacterial chromosome": Plasmids typically have fewer base pairs than bacterial chromosomes. Having more base pairs is not a characteristic of a good gene cloning plasmid.
Based on this analysis, options 1 and 2 are valid characteristics of a good plasmid for gene cloning. Therefore, a good plasmid for gene cloning will have genes that make it easily detectable and/or multiple sites that correspond to a particular restriction enzyme.