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1.Ice water has a lower density than liquid water, making it float. Describe why this property was essential for the development of life on this planet.
2. Unbuffered or weakly buffered basic solutions slowly become more acidic with time, unless they are stored in tightly sealed containers. Explain.
Hypothesize how recombination might adversely affect the functioning of an operon such as the lac operon or the trp operon. What might be the metabolic implications for an E. coli cell that experiences a disruption of one of these operons?
A circular coil enclosing an area of 160 cm2 is made of 210 turns of copper wire. The wire making up the coil has resistance of 7.0 ?, and the ends of the wire are connected to form a closed circuit.
You wish to fuse a cDNA sequence to the end of two tandem"HA" antibody epitope tags within the MCS-HAHA region of the vector given below.
Which of the following peptide sequences is likely alpha helical structure?
A major evolutionary trend among plants is: A reduction in size of the gametophyte and an increase in size of the sporophyte. A reduction in size of the sporophyte and an increase in size of gametophyte.
The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic of all of these extracellular structures.
Face and body creams that are marketed to women in order to "rejuvenate the skin, and get rid of the fine lines and wrinkles" consists of large quantities of collagens.
The both endocrine and the nerve system are major regulating system of the body; however, the nervous system has been compared to an airmail system and the endoncrine system to the pony express. What is the resemblance.
why does Beer's law hold more accurately for the relationship between absorbance and concentration than that between % transmittance and concentration?
Most general functions of a cell occur during G1 of interphase. What events that occur during other phases of the cell cycle might inhibit general metabolism?
Thiol proteases are a widely distributed group of proteases with a mechanism somewhat similar to that of the serine proteases the family of enzymes which includes chymotrypsin.
Explain any possible reasons why different plasmids isolated after the ligation reaction might contain recombinant pieces with different single base changes even though they are all of identical length.
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