Consider these statements about the structural features of nucleic acids. Some are true only for DNA or RNA, some are true for both, and some do not fit either. Which of the following statements is true for DNA only?

a. It contains the pyrimidine uracil.
b. It contains a 2 hydroxy group.
c. It contains the sugar 2-deoxyribose.
d. Bases are attached to sugars in an α-N-glycosidic linkage.

Which of the following statements is true for both DNA and RNA?

a. In base composition, %A = %C always.
b. Sugars are connected with a 3-5' phosphodiester link.
c. In base composition, %G = %C.
d. Both can be hydrolyzed in alkaline solution

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic

Using data from seismic waves, geologists have learned that earth’s interior is made up of several