Chapter 7

_____ are surface appendages that allow a bacterium to stick to a surface.

What is the function of a bacterium's capsule?

The DNA-containing region of this bacterial cell is indicated by the letter _____.

Where is a bacterial cell's DNA found?

In a bacterium, where are proteins synthesized?

What name is given to the rigid structure, found outside the plasma membrane, that surrounds and supports the bacterial cell?

The _____ is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell.

The structure that regulates the passage of material into and out of this bacterial cell is indicated by the letter _____.

For prokaryotic cells, which statement is correct concerning how the structure of a particular cell component correlates with its function?

Choose the letter that indicates the organelle that contains most of a cell's DNA.

Which of these organelles carries out cellular respiration?

Which of these is the double membrane that encloses the nucleus?

The _____ is composed of DNA and protein.

Ribosomal subunits are manufactured by the _____.

_____ are the sites of protein synthesis.

Which of these manufactures cellular membranes by adding membrane proteins and phospholipids to its own membrane?

The _____ is a selective barrier, regulating the passage of material into and out of the cell.

Where is calcium stored?

Which of these structures stores, modifies, and packages products?

Which of these are hollow rods that shape and support the cell?

_____ is/are identical in structure to centrioles.

Which of these organelles produces H2O2 as a by-product?

Which of these provides the cell with structural support?

Which of the following cell structures is only found in algal and plant cells?

Which of the following is a correct match of cell type with structure?

Molecules move into and out of the nucleus through the _____.

Which organelle plays a role in intracellular digestion?

Pancreatic cells, which secrete a large amount of digestive enzymes, are labeled with radioactive leucine and then chased for several hours with nonradioactive leucine. Photographic emulsions are prepared at different times during the chase. Where would the black spots appear on an emulsion prepared 3 hours after the pulse?

What path does a protein in the secretory pathway take, starting from its site of synthesis?

During a pulse-chase experiment, photographic emulsions were prepared at different times during the chase, and radioactive spots were detected at the following times and locations: 5 minutes: rough ER; 10 minutes: Golgi apparatus; 40 minutes: endosomes; 70 minutes: lysosomes; 140 minutes: lysosomes. Which of the following conclusions can be drawn from these results?

What scientific hypotheses can be tested by a pulse-chase experiment?

True or false? Proteins produced during the "chase" phase of a pulse-chase experiment are labeled with radioactive material

What is the first step in a pulse-chase experiment?

Which statement most accurately describes what happens to proteins that lack an ER signal sequence?

The cilia and flagella of eukaryotic cells are composed of _____.

What three distinct elements make up the cytoskeleton in eukaryotic cells?

Which answer most accurately summarizes the (1) structural and (2) functional properties of actin filaments, intermediate filaments, or microtubules?

Which of the following results provided evidence of a nuclear localization signal in the nucleoplasmin protein?

How are these signals read?

Using concepts from Chapter 3, which statement best explains why proteins—and not RNA, DNA, carbohydrates, or lipids—are the molecules responsible for "reading" the array of molecular zip codes in cells?