The conditions in the Miller–Urey experiment produced amino acids but not peptides. Subsequent experi-ments have adjusted the conditions and have produced other amino acids and stable peptide bonds. What is the significance of stable peptide bonds?
What will be an ideal response?
ANS:
Stable peptide bonds are essential for the formation of proteins. Without such bonds, life as we know it today could not exist.
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Describe the basic two-component regulatory system, and compare the function of each component
What will be an ideal response?
The club fungi are placed in the phylum Basidiomycota
(a) because of their social nature. (b) because they form basidia. (c) because of the presence of an ascocarp. (d) because they are dikaryotic.
In Africa and other parts of the world, malaria parasites can cause deadly illness. Individuals who are heterozygous for sickle-cell anemia can produce a resistance to the malaria infection. This is known as
A. heterozygote disadvantage. B. heterozygote advantage. C. polygenic inheritance. D. pleiotropy. E. homozygote advantage.
Mutations that arise in nature, from no particular artificial agent, are called ________
A) chromosomal losses B) induced mutations C) nutritional mutations D) spontaneous mutations E) cosmic mutations