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• 39.The tryptophan operon of E.coli is repressed by tryptophan added to the growth medium. The trypto
• 40. All are characteristics of transposons except: (A) segments of DNA moved non-enzymatically in th
• 2. In Figure 2, monochromatic light with a wavelength in air of λ= λ0 = 500 nm shines normally on a
• 2. Which functional groups of the common structure of amino acids are used to form peptide bonds? (
• 3. Which descriptions of the differences between eukaryotic and prokaryotic transcription are wrong?
• 4.How do eukaryotes generate various isoforms of RNA transcript from one gene? (A) Selective splici
• 5. Which descriptions of ribozyme are right? (A) Ribozyme is a protein. (B) Ribozyme is an RNA. (C)
• 6. Glucose can form 16 isomers. Mannose and galactose are glucose's: (A) D and L isomers (B) E
• 7. Tautomers are isomers of organic compounds that readily interconvert by a chemical reaction call
• 8. Which of the below is NOT involved in intron removal and the processing of mRNA precursors into m
• 9. Which one of the following descriptions about mutations is WRONG? (A) An adenosine replaced by
• 10. Which of the following product will be synthesized in platelets and upon release cause vasoconst
• 11. Prostanoids are synthesized by: (A) Pentose phosphate pathway (B) B-oxidation pathway (C) Lipox
• 12. In the lac operon, the CAP (cyclic AMP activator protein)-cAMP complex functions as: (A) A posi
• 13. The transcribed sequences complementary to the coding sequences above are: 5'-ACTGTATCGGAT-
• 14. Which one of the following descriptions is WRONG? (A) Caffeine is a trimethylxanthine. (B) Theo
• 15. Which one of the following subunits is NOT contained in the basic DNA-dependent RNA polymerase o
• 16. Which of the following descriptions about apolipoproteins is CORRECT? (A) Apo A-I is the ligand
• 17. Which of the following descriptions about acylglycerol and sphingolipid synthesis is CORRECT? (
• 18. Which of the following statements about lipoproteins is INCORRECT? (A) High density lipoprotein
• 19. Seahorse XFe analyzer is designed to measure oxygen consumption rate. Which of the following dru
• 20. Which of the following statements is NOT one of the major metabolic functions of liver? (A) Bil
• 21. Which of the following descriptions about cholesterol synthesis and metabolism is CORRECT? (A)
• 22. Which of the following description about nucleic acid is INCORRECT? (A) DNA synthesis involves
• 23. Which of the following description purine and pyrimidine de novo synthesis INCORRECT? (A) The i