Question
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I. Read the following passage and answer the subsequent questions using the answer sheet. As widely known, genetic information is transferred through a nucleic acid, I 1 1 is a macro molecule in which large number of nucleotides, consisting of 2 deoxy ribose and four kinds of 3 are combined. In a 1 molecule, the portions of 2 and deoxyribose form a long chain, and two such chains face each other, intertwined and connected horizontally by two 3 J, with the special combinations of 4 j and I 5 or 6 and 7 showing the 8 J structure. Generally in higher plants, 1 1s form chromosomes and are located in 9 in cells, but 1 some L 1 S are found in other organelles. 1 Jincludes basic information for organisms; information to synthesize proteins. Within a 1 molecule, it is 3 that contain information to synthesize proteins and function as genes. Information in 1 located in 9 lis transferred to 10 l, one of organelles, enabling specific proteins to be synthesized. Thus, for gene expression two processes are necessary; 2 a process in which necessary information in Ll is copied to L11 l, and 3 another process in which specific proteins are synthesized based on the copied information 3 I encode the information of amino acid synthesis necessary for protein synthesis by their arrangements. 4 Each amino acid is encoded by the various combinations of L3 l. Four kinds of 3 are capable of producing 64 cryptic codes, indicating 20 amino acids and codes for the start and cessation of amino acid synthesis. 1. Fill in the blanks (I 1 H 11 in the above passage from the list given below and record the appropriate letter (A-Z) in the designated space (-1 (1) (11) on the answer sheet. A adenine B adenosine C ADP D ATP E cortex. F cytosine H double helical G DNA I endoplasmic reticulum fatty acids K Golgi body L guanine M lysosome N malates O nuclei P nucleobases Q NADP R oxaloacetates S phosphate T pyruvates U ribosome W single helical V RNA stairs Y thymine Z uracil
Explanation / Answer
1.g.DNA
2.S. Phosphate
3.p. Nucleoobases
4.a. Adenine
5.L. Guanine
6.F .Cytosine
7. Y. Thymine
8.H. Double helical
9. O. Nucleus
10.U. Ribosomes
11.V. RNA
