Exam 4: A Tour of the Cell

After reading the paragraph below, answer the questions that follow. Studies of the endomembrane system often involve the use of a protein that can emit a green fluorescence (glow). A researcher wants to make a video of cell behavior, so she initially tags the outer nuclear envelope of a cell with the fluorescent tag and records for several hours. Later, she sees that the tag is part of a secretory vesicle. -What likely happened during the intervening time?

Much of the intracellular structure of a eukaryote cell is involved in protein synthesis. The figure shows the amounts of protein in cells at different parts of the cell cycle between two cell divisions. G₁ is a stage just after the cell has divided, and G₂ is the stage just before the cell divides again. S is a stage when the cell is synthesizing material such as DNA, mitochondria, and other organelles. -Which of these conclusions cannot reasonably be drawn from the graph?

An immune system cell called the plasma cell produces thousands of antibodies per second for release into the body. What type of intracellular structure would you expect to be very prominent within the cell?

A child dies following a series of chronic bacterial infections. At the autopsy, the physicians are startled to see that the child's white blood cells are loaded with vacuoles containing intact bacteria. Which of the following explanations could account for this finding?

Insulin is a protein that is produced by pancreatic cells and secreted into the bloodstream. Which of the following options correctly lists the order of the structures through which insulin passes from its production to its exit from the cell?

Which location in the cell is unlikely to contain ribosomes or ribosomal subunits?

The diameter of most animal and plant cells ranges from

A scientist wants to examine living cells lining the respiratory tract to determine how the cells use tiny hairs to move dirt and mucus away from the lungs. Which of the following instruments would be best, and why?

A pathologist who wants to examine a patient's liver cells to determine if the mitochondria have an internal structural defect will likely need to use a

Which of the following statements about the cytoskeleton is false?

Which of the following statements about plant cell walls is false?

Contractile vacuoles

Archaea are composed of ________ cells.

One centimeter = ________ millimeters.

The Golgi apparatus

Your throat is dry, and you want the last cough drop in the box to last a long time in your mouth. What should you do?

The extracellular matrix attached to cells via glycoproteins may then bind to ________ in the plasma membrane.

A cell is exposed to a substance that prevents it from dividing. The cell becomes larger and larger. This situation

Which of the following statements about electron microscopes is true?

Tay-Sachs disease