Genetic recombination can occur ____
a. during DNA replication
b. during asexual reproduction
c. during mitosis
d. from an Hfr X F- conjugation
e. from an F+ X F- conjugation
ANSWER: d
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You are trying to design a protein that will be expressed in Escherichia coli and secreted outside of the cell for purification and use as a pharmaceutical. E. coli is a gram-negative cell and the protein folds after it has exited the cell. Which secretion system would work best for this project? Support your answer with evidence based on the properties of E. coli, the protein, and the secretion system.
What will be an ideal response?
Which of the following processes does notcontribute to the formation of a biologically active form of a protein?
A. posttranslational modification of amino acids B. degradation of mRNA C. removal of one or more amino acid residues D. formation of intrachain or interchain disulfide bonds
________ can usually repair DNA damage caused by ultraviolet light.
A) Photoreactivation B) Ionizing radiation C) DNA replication D) Chromatin remodeling
Design a complete ecosystem that would sustain a number of living organisms for several years in a sealed container
The only thing that can be added is sunlight. Explain why you have selected each organism. What will be an ideal response?