ABA is an . A: antiauxin B: anticytokinin C: antigibberellin D: ethylene inhibitor

中国大学MOOC: Using terephthalic acid and ethylene glycol, and by the reaction of carboxyl and hydroxyl groups, _________ is synthesized.

Which of the following hormones can replace vernalisation? A: auxin B: cytokinin C: gibberellins D: Ethylene

EMS is a commonly used chemical mutagen for the application of mutation breeding. The full name of this chemical substance is (). A: Diethyl sulfate B: Ethyl methanesulfonate C: Ethylene imine D: Nitrosoethyl urethane

When<br/>some fruits emit (),<br/>it causes other fruits to ripen. A: ammonia<br/>gas B: oxygen<br/>gas C: ethylene<br/>gas D: nitrogen<br/>gas

培养基中常添加何种生长调节剂，以促进植株生根？（） A: 奥克辛（Auxin） B: 激勃素（GA） C: 细胞分裂素（Cytokinin） D: 乙烯（Ethylene）

Which<br/>reactions is radical reaction () A: Ethylene reacted with Cl2 B: Carbon<br/>tetrachloride is prepared from methane with light C: Isoprene<br/>synthesizes natural rubber D: Ethanol<br/>reacted with HCl

Which statement is not true about quinidine ____. A: It<br/>is composed of quinolone ring and quinolone base ring. B: The<br/>two rings are connected by hydroxymethyl. C: Contains<br/>two substituents (methoxy and ethylene) D: It<br/>has four chiral carbons. E: The<br/>target is K+ channel blocker.

Which statements are true about quinidine: A: It is composed of quinoline ring and quinoline base ring B: The two rings are connected by hydroxymethyl C: Contains two substituents (methoxy and ethylene). D: It has four chiral carbons(3R,<br/>4S, 8R, 9S ), is the dextroisomer. E: The target is K+<br/>channel blocker.