Which of the following statements is true?
A. Lactic acid is a product of aerobic respiration; ethyl alcohol is a product of fermentation.
B. Oxygen is a product of cellular respiration; carbon dioxide is a product of photosynthesis.
C. Glucose is a product of aerobic respiration; lactic acid is a product of anaerobic respiration.
D. Oxidation is the loss of electrons; reduction is the gain of electrons.
Answer: D. Oxidation is the loss of electrons; reduction is the gain of electrons.
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E. coli SSB35 differs from SSB65 due to:
A. primary sequences at amino termini. B. number of protomers. C. number of OB folds. D. extent of interaction with DNA. E. regions of contiguous A=T pairs.
The source pool for an island can be
A. the mainland. B. another island. C. secondary succession. D. the mainland or another island. E. density transition.
Answer the following statements true (T) or false (F)
1. When Ron Evans generated transgenic mice in which the gene PPAR-delta was constitutively active (i.e., always expressed), he found that these mice showed a shift from fast glycolytic fibers to slow oxidative fibers. Based on this, faster sprint speeds in the transgenic mice would also be predicted. 2. The fact that a quarterback can throw a football at approximately 50 miles per hour means that the muscles powering this throw must also be shortening at 50 miles per hour. 3. Walking or running are more energetically expensive forms of locomotion than either swimming or flying. 4. The only chyme molecule that is absorbed in significant amounts by the stomach is water.
A heterozygous organism
A) always shows a recessive trait. B) can't produce gametes. C) has two identical alleles of a gene. D) has two different alleles of a gene.