南开2006生化(国外英文资料).docVIP

南开2006生化(国外英文资料) Nankai university graduate school entrance examination biology test in 2006 One, to judge whether the following statement is true or not (to square root, the wrong person x, each question 1 point, total 15 points) A nucleotide is a six-membered ring structure. Two of adenine have a replacement. In the biosynthesis of RNA, the alpha phosphorus atoms of GTP infiltrate the RNA chain. The reverse transcriptase has proofreading function. The introns dont need ATP. The highly repetitive sequence of eukaryotic DNA is also called satellite DNA. The limit and the genetic map are the same. Tryptophan manipulation has a negative regulatory mechanism. The transgenic process of plasmid is called transduction. Eukaryotes produce a variety of protein products. The glucose-6-phosphate pathway is dependent on the ratio of NADP + to NADPH. No oxygen is involved in fermentation and fermentation, which is known as the oxygen-free decomposition of sugar. The allosteric enzyme is the indwelling enzyme. Glycerin and acetyl CoA are precursors of glycogeniform. Steroid hormones can also be effective through the membrane receptors. Two. Fill in the blanks (1 point, 23 points) A 3150bp covalently closed circular DNA molecule with a superhelical density of -0.05 and its Lk, Tw and Wr values (), (), (). The eukaryotic mRNA is usually at the end of the 5 (), 3 at the end (), and they are the product of the () process. Protein biosynthesis can be divided into five phases, they are (), (), (), (), (). The secondary keys that maintain the tertiary structure of the protein have (), (), (), (), (). There are many sequences in the collagen polypeptide chain that are repeated (). The dihedral Angle phi is () in the alpha helical structure, and psi is (). The main function of vitamin K is (). The ubiquitination of proteins eventually leads to proteins (). The coenzyme of the Glu decarboxylase is (), the coenzyme of pyruvate carboxylase is (). Nitrogenase catalysis () produces NO. Three