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• 71.下列化合物的立體異構物構型為 (A)R (B)S (C)E (D)Z
• 2.Nitrogen fixation can occur in which of the following organisms?(A) prokaryotes(B) plants(C) anima
• 3.The use of mRNA and reverse transcriptase is part of a strategy to solve the problem of(A) epigene
• 4.What is the most common transported sugar in the plant?(A) Glyceraldehyde 3-phosphate(B) Fructose(
• 5.The best time to measure an animal's basal metabolic rate is when the animal(A) is resting an
• 6.When human beings choose a mate, they usually prefer people with the same skin color, same culture
• 7.Cytoskeleton of a eukaryotic cell is made up of (a)microtubule, (b)microfilament and(c)intermediat
• 8.Mitochondria are thought to be the descendants of certain alpha proteobacteria. They are, however,
• 9.What controls sex determination in American alligator?(A) Temperature(B) Behavioral interactions(C
• 10. Why are action potentials usually conducted in only one direction along an axon?(A) The nodes of
• 11. Which statement about biological homology is correct?(A) Paralogs: Insect wings and bat wings ar
• 12. Which of the following statements regarding photoperiodism is false?(A) Photoperiodism is the ph
• 13. All female mammals have one active X chromosome per cell instead of two. What causes this tohapp
• 14. A genetic map shows the map distance. The units of genetic distance are called map units (mu)or
• 15. A researcher is analyzing the immune response of a patient following the patient's exposure
• 16. What is the name of the protein that is used to form the initial glycogen primer?(A) phosphopori
• 17. Which of the following pairs of amino acids could form electrostatic interactions by their side
• 18. In humans, gluconeogenesis:(A) can result in the conversion of protein into blood glucose.(B) he
• 19. Which of the following is (are) NOT found as covalently attached anchors in lipid-linked protein
• 20. Aspirin inhibits the synthesis of which of the following sets of eicosanoids?(A) Prostaglandin E
• 21. In which metabolic pathway does glucose-6-phosphate dehydrogenase play a key role?(A) glycogenes
• 22.Which of the following explains are the enzyme effects?(A) Enzymes release products very rapidly(
• 23. Enzymes are biological catalysts that enhance the rate of a reaction by:(A) decreasing the activ
• 24. To determine the isoelectric point of a protein, first establish that a gel:(A) contains a denat
• 25 Which of the following lipids can be formed by the methylation of phosphatidylethanolamine?(A) Ph