Many enzyme-catalyzed reactions are freely reversible; however, some key steps require separate enzymes for the reverse step in order to provide for independent regulation of anabolic and catabolic pathways.
Answer the following statement true (T) or false (F)
True
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Based on the evolutionary tree, which letter represents the common ancestor of all
eukaryotes?
a. A b. B c. C d. D
Which of the following determines genetic sex (male or female) in mammals?
A. the Y chromosome contained in the egg B. the SRY gene on the Y chromosome C. the temperature of the developing fetus D. the genetic makeup of the parents E. the acrosome of the sperm
What fraction of offspring of the cross AaBb × AaBb would be homozygous for both the dominant alleles, assuming that they are on different chromosomes?
A: 1/16 B: 1/32 C: 1/4 D: 1/8 E: 1/64
Which of the following statements about the tongue is true?
A. The tongue mixes food with saliva and assists in swallowing. B. The tongue consists of striated muscle under voluntary control. C. The tongue can detect taste, touch, and pressure. D. All of the choices are correct.