A galvanic cell was constructed using Zn/Zn2+ and Cu/Cu2+. Given the standard reduction potentials for Zn and Cu, which metal would be the anode?Cu2+ + 2e- –> Cu             = 0.34VZn2+ + 2e- –> Zn             = -0.76V

What is the equilibrium expression in concentration (Kc) for the following reaction in the forward direction: 2NO2(g) ↔ 2NO(g) + O2(g)

Consider the following reaction at equilibrium: N2O4 (g) ↔ 2NO2 (g). What is the equilibrium constant in concentration (Kc) of the forward reaction if the concentration of N2O4 is 0.124 M and the concentration of NO2 is 0.0258 M?

What happens when a small amount of strong base is added to a buffer?

Label each of the following changes as:  i) a synonymous mutation, ii) a non-synonymous substitution, iii) a stop-loss mutation, iv) a nonsense (stop-gain) mutation. (A genetic code table is below).   A) UGA –> UCA   B) UAC –> UAA   C) AGA –> AAA   D) AGA –> CGA    

What should you have prepared before starting a quiz or exam?

Colorblind 1 Your next project is to genetically map the locus for color blindness, an X-linked recessive trait, with respect to simple sequence repeat (SSR) markers. Like many X-linked recessive traits, colorblindness is usually found in males. However, the mutant allele frequency is sufficiently high that colorblind females do occur. In this problem, + is the allele that leads to normal vision, and clr is the allele associated with color-blindness. Assume complete penetrance and no new mutations. The family below has been genotyped for two SSR markers – there are 2 alleles for SSR 72 (Z&W) and 3 alleles for SSR 73 (a,b, & c).  The mother is deceased; thus, her DNA has not been analyzed.  Below the pedigree are the results from the DNA analysis – the heavier bands indicate more DNA.    A) What is the (deceased) mother’s genotype at SSR72?   B) What is the (deceased) mother’s genotype at SSR73?   C) What is the most likely phase relationship between the alleles at SSR72 and the color blindness locus in the mother. D) What is the most likely phase relationship between the alleles at SSR73 and the color blindness locus in the mother.        

A certain X-linked dominant disease in humans occurs when there are more than 40 repeats of a CGG trinucleotide in a particular gene. 5′ CAGTATGCA——(CGG)n——-ATGCGTAAT 3′ 3′ GTCATACGT——(GCC)n——-TACGCATTA 5′ Where n refers to the number of CGG repeats. In the lab freezer, you find PCR primers that are complementary to the sequence on either side of the repeats, which will allow you to amplify DNA fragments containing the repeat.  Shown below are the outline of a pedigree for the disease described above, and a representation of a gel showing PCR-amplified fragments detecting the number of CGG repeats in 8 siblings. The DNA corresponding to each individual is directly below his or her place in the pedigree. Which individuals are male?  Which individuals are female? Which individuals are affected?

The California Poison Control System coordinated a response with the California Department of Public Health Toxicological Outbreak Program. 

Which of the following is not part of the case definition for wild mushroom poisoning?