Describe the process of site-specific recombination by the phage lambda
What will be an ideal response?
Ans: The DNA of the phage lambda inserts itself into the genome of the host bacterial cell by site-specific recombination. A region of the circular lambda DNA, attP, is homologous to a site on the bacterial chromosome called attB. Recombination between these two sites integrates lambda DNA into the chromosome, since both molecules are circular. The phage DNA is called a prophage while it is integrated. A second intramolecular recombination between the recombination att sites attL and attR will excise the prophage from the chromosome.
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Proteins in biological systems _____
A) store genetic information B) link with other proteins to form bilayers in cell membranes C) form high-energy intermediates such as ATP D) catalyze reactions
You are bitten by a venomous snake at a nature center. A snake handler is also bitten. You are rushed to the emergency room and given an antiserum
The snake handler does not receive treatment because he said he was exposed to venom so many times that he is immune. What is antiserum and will you have long-lasting immunity to snake venom after this? Is what the snake handler said possible or should he also receive treatment? If he does not receive treatment and is not affected, what is protecting him? What will be an ideal response?
Once a stimulus for inflammation subsides, ____ produce compounds that suppress inflammation and promote
healing.
a. neutrophils b. macrophages c. dendritic cells d. T lymphocytes e. monocytes
A color-blind woman with Turner syndrome (XO) has a father who is color-blind
Given that the gene for the color-blind condition is recessive and X-linked, provide a likely explanation for the origin of the color-blind and cytogenetic conditions in the woman.