Living things use enzymes in the chemical reactions of metabolism. When 2 points food is digested, it is metabolized to release energy. Which statement
best describes the role of an enzyme in this process?

Because enzymes are proteins, they only react with other protein molecules, resulting
in the production of glucose.

The active site of an enzyme attached to a substrate prevents the chemical
reactions involved in metabolism from happening too quickly

The active site of the enzyme binds to a substrate on a food molecule and the enzyme
changes shape slightly, causing a chemical reaction to happen.

Approximately 90% of all cases of polycystic kidney disease are inherited in an autosomal dominant fashion. the disease is typically related to mutations to genes (pkd1 and pkd2). pkd genes can be found on chromosome 16. the disease occurs in approximately 1: 800 to 1: 1000 people. here is a hypothetical example. the dominant allele d will cause the development of pkd. the recessive allele is known as d. what genotypes would correspond to suffering from pkd? dd, dd what genotypes would correspond to being normal (not suffering from pkd)? dd consider that 1: 1,000 people have pkd in your population of 325million. consider that pkd is inherited in an autosomal dominant fashion. show you math for all of the following questions: what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is p? what is q? how many people in your population would have pkd?

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

Match the description of each organism to the appropriate category