Explain how the field of human biochemical genetics had its beginnings partly through the persistence of a young
mother. What will be an ideal response?
ANSWER: Borgny Egeland had two children with intellectual disability. Her daughter, Liv, did not walk until she was nearly 2 years of age and she spoke only a few words. Liv also had a musty
odor that could not be washed away. Liv’s younger brother, Dag, was also slow to develop
and never learned to walk or talk. He had the same musty odor as his sister. To learn what
was wrong with her children, she went from doctor to doctor, but to no avail. Finally, in the
spring of 1934, the persistent woman took the two children, then ages 4 and 7 years, to Dr.
Asbjorn Folling, who was a physician and a biochemist. Folling began the research that led to
the discovery of phenylketonuria.
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The process of phosphorylation
A. All of the answer choices are correct. B. may change the shape of the target molecule. C. adds a phosphate group to a molecule. D. removes a phosphate group from a molecule. E. may energize the target molecule.
Which statement is true?
a. The movement of solvent occurs from a hypotonic solution to an isotonic solution. b. The net movement from an isotonic to a hypotonic solution involves the movement of solute molecules only. c. The concentration of the solute is greater in an isotonic solution than in a hypertonic solution. d. The concentration of the solvent is greater in a hypertonic solution than in an isotonic solution. e. Osmosis involves only hypertonic solutions.
Classification.Respond to the following statements with reference to the fruit types listed below.
A. The wall of this type of fruit splits along a seam to release the seeds inside when they are mature. B. A strawberry is an aggregate of many of these types of fruits. C. This is a fleshy fruit with one seed enclosed by a hard pit. D. This fleshy fruit often has many seeds and no pit. E. This is a fleshy fruit in which tissues derived from the receptacle enclose a core derived from the ovary wall.
The actual gap between the axon terminal and the muscle cell is called a
a Motor Unit b. Synaptic Cleft c. Acetylcholine d. Action Potential