About twenty-five of the ninety-two natural elements are known to be essential to life. Which four of these twenty-five elements make up approximately 96 percent of living matter?
A) carbon, sodium, hydrogen, nitrogen
B) carbon, oxygen, phosphorus, hydrogen
C) oxygen, hydrogen, calcium, nitrogen
D) carbon, hydrogen, nitrogen, oxygen
E) carbon, oxygen, nitrogen, calcium
Answer: D
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In order to add a single amino acid to a growing polypeptide chain, a grand total of ________ molecules or ATP or GTP are utilized.
A. three B. four C. six D. two
Which is the proper order of organization?
a. Cells, organs, tissues b. Cells, tissues, organs c. Organs, tissues, organs systems d. Organs, cells, tissues e. Tissues, organs, cells.
The most extreme form of female genital cutting (FGC) involves the removal of the clitoris, all of the inner lips, and part of the outer lips. The remaining parts of the outer lips are then stitched together. This form of FGC is called _____.
A. ovariotomy B. excision C. infibulation D. clitoridectomy
The Human Genome Project, which got under way in 1990, is an international effort to ________
A) clone deleterious genes from humans and study their mode of action B) collect plant seeds in order to reduce the impact of human activity on plant extinction C) collect samples of cells from all parts of the world in order to preserve human genetic diversity D) clone beneficial genes from humans for eventual use in gene therapy E) determine the base sequence of the human genome and to identify all the genes within