In the breakdown of glucose, a phosphorylated six-carbon compound is split into two phosphorylated three-carbon sugars, which are named ____.
A. PGAL
B. pyruvate
C. acetyl-CoA
D. lactate
E. acetaldehyde
Answer: A
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Some complex viruses have icosahedral symmetry in the head region and helical symmetry in the tail. Overall, these viruses are said to have ________ symmetry.
A. none of these B. bilateral C. binal D. complex
Which portion of the photosynthetic apparatus is involved in the oxidation or splitting of water?
A. reaction center B. antenna complex C. P680 chlorophyll D. manganese cluster E. light-harvesting complex
An organism in which foreign genes have been incorporated is called a:
a. recombinant organism. b. transgene. c. polymorphism d. transgenic organism. e. recombinant
Some of your DNA may not code for any protein and has no known function in gene regulation; it is sometimes referred to as noncoding DNA. How do nucleotide sequences of "noncoding DNA" evolve?
A) They evolve through natural selection. B) They evolve through genetic drift and other chance processes. C) They evolve to be more useful by taking on new functions. D) They evolve by gradually being eliminated from the gene pool.