What fraction of medical prescriptions filled in the United States are drugs extracted directly from flowering plants?
A) none
B) one-tenth
C) one-quarter
D) one-half
E) all
Ans: C) one-quarter
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Which of the following is a polysaccharide?
A. Fructose B. Cellulose C. Sucrose D. Glucose
Four of the five answers listed below are
events occurring during mitosis. Select the EXCEPTION.
a. crossing over b. division of centromeres c. chromosomes line up at the cellular equator d. attachment of spindle microtubules to centromeres e. migration of chromosomes to opposite ends of the cell
What is the product of the addition of O2 to RuBP by rubisco?
a. one molecule of G3P b. one molecule of 3PGA and one molecule of phosphoglycolate c. two molecules of phosphoglycolate d. three molecules of 3PGA
Which of the following is true of telomeres?
A. They have the sequence ATAGGG. B. They are at in the middle of chromosomes. C. Their sequence can change. D. They shorten with each round of cell replication. E. They have the sequence ATAGTG.