Question

5. Which of the following single-stranded DNA sequences is most likely to form a stem-loop structure? a. GACCGTATGCACGGTC b. TCATAGGCGCCGTTCA c. GGATCACGTTACCGCC d. ATAAGATGGGAGCATG The structures below represent the 8 D stereoisomeric aldohexoses. Answer the following (6-7) based on this figure Si carbons ---OH H= =QH --OH H--OH CH,OH HO--- H=CHCH -- - OH CH,OH ---CH HỌC 6 -- - OH Chon D-Glucose HO-- H H -- - OH CH,OH -Marnese -- Hà QH HO--- - OH CHOH Giese HO-- H =CH HO--- H -OH Chon s e -- HỌC=H HO---- - OH CH,OH -Galactose HO-- HỌC HỆ HO--- -OH CHOM lose 6. D-Allose and D-glucose are a. Epimers at C-2. b. Epimers at C-3 c. Epimers at C-4. d. Epimers at C-5. e. Anomers. 7. If D galactose was oxidized at C-1 and C-6 to give a sugar alcohol this molecule would be a. Cyclic. b. Optically active. c. Optically inactive. d. Racemic. e. None of the above. 8. In order to amplify single stranded DNA by the polymerase chain reaction (PCR) one requires a. DNA, primer, Taq polymerase, 4dNTPs and Mg** b. DNA, a template, Taq polymerase, 4dNTPs and Mg** c. DNA, primer, Taq polymerase, 4ddNTPs and Mg** d. RNA, a template, Taq polymerase, 4dNTPs and Mg* e. DNA, primer, Taq polymerase, 4dNTPs, a ddNTP and Mg**

Answer 1

sten - IDHA loop means it is a type of etructure which is formed when ribonucleic ands a bolds onto itself to form a double helical structure that consist of two complimentary sequence

. 5'- Т - Т- С-1 – 4-д - CT- д -4-A-4--- Т- ит? complimentary can tom - Hydrogen bond 1 SEN, . г. тассат At at Ac441 complimentary 2) Тce Tech се атт CA . Complementary, but breat Chould . be there in between курст Сор. 34. 2 7 чадтс дъti Acc 4LC, i no complimentary АТА-Атила с.4 16 no complimentary .:: So option t' correct.