In yeast, one haploid strain is unable to synthesize uracil but able to synthesize leucine, while another haploid strain is able to synthesize uracil but not leucine. You think that the ability to synthesize uracil and leucine has a genetic basis. Your goal is to determine the genotypes of the […]

1. In compost tea made by incubation dry leaves in sterile water, many aquatic life forms can be detected after 2-3 weeks old. Where did these and other microbes com from? Were they present at the start? 2. Eastern hognose snakes (Heterodon platirhinos) are dietry specialists feeding almost exclusively on […]

Biology Assignment: Central Nervous System 1.The central nervous system (CNS) consists of the brain and spinal cord . 2.The epidural space contains primarily fat . Epidural anesthetics therefore have to cross the dura mater order to reach the nerve roots within the subarachnoid space. 3.Cerebrospinal fluid is created from blood […]

1) A wild-type polypeptideconsists of 27 amino acids. Many mutants have been discovered that produce versions of this polypeptide that are longer than normal.These mutations are each due to a substitution of a singlebase. a. What kind of mutation isresponsible? b. Do you expect the first 27amino acids in the […]