Exam 7: Inside the Cell

You arrive late to lecture and your professor is describing a feature of the nucleus that provides it with structural support.You are not sure which feature is being discussed,but because you read the book before you came to class,you are fairly certain that it is

What is a purpose of the cell wall for both prokaryotes and plant cells?

Mitochondria are separated into two compartments,the matrix and the intermembrane space,by their inner and outer membranes.How does the presence of two compartments contribute to the function of mitochondria?

Scientists found that polypeptides that are normally synthesized in the endoplasmic reticulum are about 20 amino acids longer when they are synthesized by ribosomes not attached to the endoplasmic reticulum.What is/are possible explanations for the greater length of these polypeptides?

Which of the following represents a major difference between prokaryotic cells and eukaryotic cells?

A cell is found to contain a series of damaged organelles.Which process will play a role in removal of these damaged organelles from the cytosol?

How is the nuclear membrane related to the endoplasmic reticulum?

Which of the following is not a characteristic that chloroplasts and mitochondria share?

You have a distant cousin,age 4,who is always tired and fatigued and is not able to play games and sports like other healthy children.He is most likely to have an enzyme deficiency or defect associated with which intracellular organelle?

Which of the following components would you expect to find in any type of living organism?

What is the site of synthesis of proteins for export (secretion from the cell)?

Which of the following would be true for lysosomes that lack mannose-6-phosphate receptors?

Spherocytosis is a defect associated with a defective cytoskeletal protein in red blood cells.What do you suspect is one consequence of defective cytoskeletal proteins in red blood cells?

Flagella and cilia bend or move,imparting mobility to cells.How do these structures move?

Researchers tried to explain how vesicular transport occurs in cells by attempting to assemble the transport components.They set up microtubular tracks along which vesicles could be transported,and they added vesicles and ATP (because they knew the transport process requires energy).Yet,when they put everything together,there was no movement or transport of vesicles.What were they missing?

You are sitting in lecture and you decide to leave the room for a minute.When you return,the professor is describing a cytoskeletal component and states that these fibres are thin and consist of two rows of protein subunits wound around each other in a long spiral.Since you left the room,you did not hear which cytoskeletal component is being referred to,but,since you read the book before you came to class,you know that it is

The small intestine is the site of digestion and absorption of nutrients.A single layer of epithelial cells lines the small intestine.In the duodenum (the first section of the small intestine),these epithelial cells secrete large quantities of digestive enzymes.Which of the following features would be typical of these epithelial cells?

Flagella are found in both eukaryotic cells and prokaryotic cells.Despite the functional similarities of all flagella,scientists suspect that eukaryotic and prokaryotic flagella have evolved independently.Why don't they think there is a common evolutionary origin for prokaryotic and eukaryotic flagella?