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1) Describe the process of muscle contraction. Includea description of the sarcomere structure and what happens to itduring muscle contraction and relaxation. Also describe howthe process is regulated, including the roles of ATP andCa2+. Be sure to include the names and activitiesof relevant molecules.
2) Describe the process of X-chromosome inactivation neededfor X chromosome dosage compensation in femalemammals. Include a description of the two phases (initiationand maintenance) and what is involved in each. Be sure toinclude the names and activities of relevant molecules.
Explain the four main stages of food processing in mammals and indicate where each process occurs along the tubular digestive tract.
The oldest rocks on Earth date from about 4.2 billion years ago. What does this propose about the interval between 4.6 billion years ago, while the Earth started to form, and 4.2 billion years ago.
Briefly explain bacterial disease, viral disease, fungal disease and parasitic disease, and give an example of each.
Many infectious diseases are becoming difficult to treat because of bacterial resistance to antibiotics. Populations of bacteria can become resistant when they are exposed to an antibiotic. What is the best general explanation for how this occurs?
which of the following statements best describes DNA polymerase?
Compare and contrast the metabolic changes in each tissue under the absorptive state and fasting state (liver, adipose, skeletal muscle).
Create the psychometric function that you would expect if the returned echo is shifted by 90 degree relative to the outgoing pulse of the echolocating bat, Eptesicus .
What structures in cells indicate an evolutionary relationship between bacteria, plants and animals?
Which of the following best describes the process of gas exchange in insects?
Two strains of the same species both contain known PCR primer sites for a gene that encodes for a virulence factor. However, the avirulent strain has a long insertion mutation in the PCR primer site that is not present within the virulent stain. H..
What methods would be used to determine the arrangement of atoms within a protein? This method has also been used to detect and locate the spatial arrangement of the atoms of DNA.
Illustrate four organelles or structures that all eukaryotic cells have in common. In adding, describe two eukaryotic cell features that would be found only in autotrophic cells.
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