Draw a structural formula for each of the following branched alkanes.
a. 2,2,4-trimethylheptane

how many electrons does mg2+ have

Write the electron configuration for K$^+$.

Give the structure corresponding to each IUPAC name. a. 1,2-dimethylcyclobutane b. 1,1,2-trimethylcyclopropane c. 4-ethyl-1,2-dimethylcyclohexane d. 1-sec-butyl-3-isopropylcyclopentane e. 1,1,2,3,4-pentamethylcycloheptane

Each of the following IUPAC names is incorrect. Explain why it is incorrect and give the correct IUPAC name. a. 2,2-dimethyl-4-ethylheptane b. 5-ethyl-2-methylhexane c. 2-methyl-2-isopropylheptane d. 1,5-dimethylcyclohexane e. 1-ethyl-2,6-dimethylcycloheptane f. 5,5,6-trimethyloctane g. 3-butyl-2,2-dimethylhexane h. 1,3-dimethylbutane

Draw a structural formula for each of the following branched alkanes.
d. 3,3-dimethylpentane

Draw a structural formula for each of the following branched alkanes.
c. 2,2-dimethylpentane

Draw a structural formula for each of the following branched alkanes.
b. 2,4-dimethylpentane

List the basic principles of genetics that Mendel discovered in his experiments. Briefly describe each of these principles.

In regulation of the trp operon, when tryptophan is present, a. the repressor is able to bind to the operator.b. the repressor is unable to bind to the operator.c. transcription of the repressor in inhibited.d. transcription of the structural genes, operator, and promoter occurs.

If the lac repressor gene were mutated so that the allosteric site on the encoded protein no longer bound allolactose, what would be the effect on transcription of the lac operon? What about a similar mutation in the trp repressor gene?

Draw a structural formula for each of the following branched alkanes.
a. 2,3-dimethylpentane

In giving the name of a hydrocarbon with several substituents, in what order do we list the substituents?

What prefixes would be used in the systematic name of an alkane to indicate that the alkane contained three methyl branches?