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Phenylketonuria is a severe form of mental retardation caused by a recessive allele. The condition affects about 1 in 25,000 newborn babies. In a population of 250,000 people, how many are expected to be heterozygote 'carriers' for this disease?
A weak acid (HA) has a pKa of 4.691. If a solution of this acid has a pH of 4.920, what percentage of the acid is not ionized? (Assume all H in solution came from the ionization of HA.)
Imagine that the sample of sediments are cemented together to form a sedimentary rock. After that, that rock is heated and compressed into a metamorphic rock.
Jill is motivated by money and the things money will bring her. Jack is motivated by a belief in the significance of doing good things, and his incentives are based on that belief. Which theory incorporates both these types of motivational causes.
The following experiments are carried out using a pure preparation of enzyme that catalyzes palmitate synthesis from acetyl CoA and malonyl CoA in presence of all the cofactors needed for reaction.If the acetyl CoA is labeled at the methyl carbon.
Cleavage of DNA with restriction enzymes provides landmarks and sequence information. How frequently are specific sites found? How many sites are expected? Does this change if the DNA is circular.
Is this an instance of a positive or negative feedback mechanisms? What is the initial stimulus? What is the result.
As a biologist it is your job to look for plants that have evolved structures with a selective advantage in dry hot conditions. Which of the adaptions would be least likely to meet the objective.
Why can there be dissimilarity between heart rate averaged over 15 seconds and instantaneous heart rates. Suppose that green turtle grass ingestion time for the sea urchins has an approximate normal distribution.
Elucidate results of all four crosses, using clearly defined gene symbols. describe origin of both of the original prototrophic colonies.
What is the function of the polymerase chain reaction (PCR) in genetic engineering? To cut DNA into many fragments.To carry DNA into a new cell.To make millions of copies of a specific segment of DNA.
Illustrate the main types of faults and corresponding directions of stress. Differentiate between fault and joint. How does the stress differ between the two? Of what importance are these fractures to other geological processes.
give difference between the free energy change for a reation and the standard free energy change (delta-G°') for the reaction.
List in order the higher taxons used in classification (domain, kingdom, phylum, genus, species) List the 3 domains and how they differ. Describe uses and effects of microbes for man.
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