Alcohol acts predominantly as a(n)
a. stimulant.
b. analgesic.
c. hallucinogen.
d. depressant.
e. anesthetic.
D
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Hoogsteen base pairing:
A. can result in the formation of a tetraplex DNA from stretches of G residues. B. causes additional paring of an A to an existing A-T pair such that the T is bound to both Abases. C. can result in triplex DNA formation in stretches of DNA containing alternating purines and pyrimidines. D. results in triplex DNA in which all three strands are composed of purines only. E. can result in the formation of triplex DNA within long sequences containing only pyrimidines or only purines in a given strand.
his4 trp1; his4 trp1; HIS4 TRP1; HIS4 TRP
A haploid yeast strain has mating type a and genotype his4 TRP1. A different haploid yeast strain has mating type ? and genotype HIS4 trp1. The two strains mate and produce diploid offspring with genotype his4 TRP1 / HIS4 trp1. The diploid cells undergo meiosis to produce a variety of tetrad types. In the following questions, the genotypes of the spores in a tetrad are shown. For each tetrad, tell what type it is: parental (PD), non-parental (NPD), or tetratype (T). A) PD B) NPD C) T D) cannot be determined
The diversity of haploid daughter cells is increased by the independent assortment of chromosomes at anaphase and by
a. crossing over and recombination. b. somatic mutation. c. chromosome elimination. d. the selection of the fittest sperm.
The pulmonary artery carries blood away from the following structures?
a) aorta b) right atrium c) right ventricle d) left atrium e) left ventricle