2. Cell Chemistry & Cell Components
Introduction to the Cytoskeleton
- Textbook QuestionGeorge Palade's research group used the pulse–chase assay to elucidate the secretory pathway in pancreatic cells. If they had instead performed this assay on muscle cells, where would you expect the labeled proteins to end up during the chase? (Muscle cells consist primarily of actin and myosin filaments and have high energy demands for muscle contraction.)
- Multiple ChoiceWhich statement about the cytoskeleton is true?2views
- Multiple ChoiceWhich of the following best describes actin filaments?
- Multiple ChoiceWhich of the following statements about microtubules during anaphase is true?
- Textbook Question
Dynein is missing from the cilia and flagella of individuals with a specific inherited disorder. These individuals have severe respiratory problems and, if males, are sterile. What is the structural connection between these two symptoms?
1views - Multiple ChoiceWhat are the three types of protein structures that contribute to the cytoskeleton?
- Multiple ChoiceWhich of the following is a feature common to all three components of the cytoskeleton?
- Textbook Question
Mark the following statements about the cytoskeleton as true or false. If a statement is false, correct it to make a true statement.
Microtubules are hollow tubes that align organelles and shuttle them to their proper places in the cell.
- Multiple ChoiceBasal bodies are most closely associated with which of the following cell components?2views
- Multiple ChoiceWhich statement about intermediate filaments is NOT true?
- Multiple ChoiceWhich statement best describes an actin filament?
- Textbook Question
Mark the following statements about the cytoskeleton as true or false. If a statement is false, correct it to make a true statement.
The cilia found on sperm cells propel the cells through a liquid medium.
- Textbook Question
Mark the following statements about the cytoskeleton as true or false. If a statement is false, correct it to make a true statement.
Actin filaments combine with myosin motor proteins to provide the cell with mechanical strength.
4views - Textbook Question
What effect would the hypothetical poison of question 3 have on other functions of the cell? Explain.
1views - Textbook QuestionDescribe two different ways in which cilia can function in organisms.1views