The substance formed on addition of water to an aldehyde or ketone is called a hydrate or a/an: a. vicinal diol b. geminal diol c. acetal d. ketal

Choose the BEST reagents for carrying out each of the following conversions. a. 1. PhMgBr, ether   2. H3O+ b. 1. PhCH2MgBr, ether   2. H3O+ c. (C6H5)3P=CHC6H5, THF d. Li(C6H5)2Cu, ether

Which of the following is not a valid resonance form of the intermediate species in the reaction shown below?       

The major type of organic compound that results from treating 4-phenylbutene according to the following reaction sequence is: 1. BH3/THF 2.  OH-/H2O2 3.  PCC

Cyanohydrins are important intermediates in the synthesis of α-hydroxycarboxylic acids from ketones and aldehydes. The nitrile functional group can be hydrolyzed by aqueous acid to yield a carboxylic acid. Nitriles can also be hydrolyzed to carboxylic acids using aqueous base. Unfortunately, when a cyanohydrin is treated with aqueous base the original carbonyl compound is isolated. The reaction of an aldehyde with hydrogen cyanide is an example of _____ reaction. a. a nucleophilic substitution b. an electrophilic addition c. an electrophilic substitution d. a nucleophilic addition

Choose the BEST reagent for carrying out each of the following conversions. a. LiAlH4, THF b. NaBH4, ethanol c. 1. DIBAH, toluene   2. H3O+ d. H2/Pd

Which of the following would be classified as a Michael donor?

Which of the following is the product from the reaction sequence shown below?       

The enzyme responsible for laying down a nonsense, non-coding segment of DNA at the end of linear chromosomes is what?

Which of the following best describes how the Cas9 protein determines where to cut a DNA strand?