Amino acids and other organic molecules were formed in the laboratory of Miller and Urey from which of the
following?
a. hydrogen, methane, water, ammonia, and electrical discharge
b. heat, ultraviolet radiation, water, carbon dioxide, and amines
c. heat, infrared radiation, water, carbon dioxide, and free nitrogen
d. heat, electrical discharge, water, nitric oxide, and carbon dioxide
e. ultraviolet radiation, electrical discharge, carbon dioxide, nitrogen, and ammonia
a
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What is the relationship between recombination frequency and the actual physical distance on a chromosome?
A. As physical distance increases, the recombination frequency increases in a linear fashion. B. As physical distance increases, the recombination frequency decreases in a linear fashion. C. As physical distance increases, the recombination frequency first increases in a linear fashion, but gradually levels off to a frequency of 0.5. D. As physical distance increases, the recombination frequency first increases, but then decreases.
Biosynthesis of glucose can occur by compounds other than sugars via gluconeogenesis
Indicate whether the statement is true or false.
Congenital deafness in humans is due to the homozygous condition of either or both of the recessive
genes d or e. Both dominant D and E are necessary for normal hearing. Gene D/d affects the middle ear, while gene E/e affects the inner ear. It does not matter how good the normal inner ear (as indicated by E_) is; if there is something wrong in the middle ear, the individual is unable to hear. The same applies for the other gene. Give the phenotypic results of the following crosses: (a) Dd EE ? Dd EE (b) Dd Ee ? Dd Ee (c) dd EE ? DD ee (d) Dd EE ? Dd ee (e) Dd EE ? DD Ee What will be an ideal response?
Rank the sensory receptors in order, from the ability to detect the widest variety of molecules, to the least variety of molecules (or none).____ Photoreceptors____ Gustatory receptors____ Olfactory receptors____ TRP channel temperature receptors
What will be an ideal response?