Exam 3: Cell Structure and Internal Compartments

The contents of cells are often visualized with fluorescent (glow-in-the-dark)stains.You treat a cell with a stain that makes a certain part of the cytoskeleton glow green and another stain that makes mitochondria glow red.Under the microscope,you see a meshwork of green filaments throughout the cell.Red organelles appear to be traveling along the filaments.The green stain you used must stain

The smooth endoplasmic reticulum

Which of the following statements is true?

Ribosomes are very small,nonmembranous organelles associated with the synthesis of

A ribosome has internal cristae.

You are an astronaut and have discovered an alien photosynthetic organism.It has organelles that are responsible for photosynthesis;these organelles appear to work in much the same way as the chloroplasts in plants on Earth.The only difference is that they are red.Which color of light is NOT likely to drive photosynthesis in these alien organelles?

Membrane-enclosed structures in eukaryotic cells are called ________.

The ________ found in eukaryotic cells have cristae.

The ________ is the place where the majority of the genetic material in a eukaryotic cell is stored.

Which of the following would you find in the cells that produce the mucus that lines the nasal cavities?

Which of the following components contribute to the structure of the cytoskeleton of a cell?

Nuclear pores allow the nucleus to pass through the plasma membrane.

In general,chemical reactions occur more efficiently and quickly in ________ because the reactants of different reactions are concentrated within compartments in the cell specialized to contain those reactions.

Organisms whose cells lack internal,membrane-bound organelles are classified as ________.

The light-capturing pigments of photosynthesis like chlorophyll are contained in the membrane of a structure known as a(n)

Which of the following works like a propeller?

The Golgi apparatus

The nucleolus is

The inner membranes of both mitochondria and chloroplasts are folded into various arrangements.What is the advantage of having a folded membrane rather than a simple interior membrane that follows the same oval shape as the exterior membrane?

Mitochondria produce most of the energy used in a bacterial cell.