Exam 3: Cell Structure and Function

The phosphate "head" of a phospholipid is

Anticodons are found on which molecule?

________ processes move substances across a membrane regardless of concentration gradients.

The stage of the cell cycle during which DNA replication and synthesis of histones occur is called

Figure 3-2 A Process Use Figure 3-2 to answer the following questions: -Using the preceding image, determine the correct sequence of events in the primary process, which begins when target molecules (ligands)bind to receptors in the plasma membrane. 1. Target molecules are removed and absorbed into the cytoplasm. 2. The membrane containing the receptor molecules detaches from the lysosome. 3. Pockets pinch off, forming coated vesicles. 4. Areas coated with ligands form deep pockets in the membrane surface. 5. The vesicle fuses with the plasma membrane. 6. Coated vesicles fuse with lysosomes.

Immersion of red blood cells into a(n)________ solution results in lysis of the cell.

Figure 3-4 Protein Synthesis Use Figure 3-4 to answer the following questions: -Identify the organelle shown in the figure, which is described as stacks of flattened membranes containing chambers.

There are chemicals that bind to microfilaments and block the elongation of actin in a cell. This would damage

Synthesis of phospholipids is a function of the

Which of the following is true of the sodium-potassium exchange pump?

If a cell lacked centrioles, it probably would not be able to

Two solutions are separated by a semipermeable membrane with the same properties as a cell membrane. Solution A is 5 percent glucose and solution B is 10 percent glucose. Under these circumstances,

The job of a sperm cell, or spermatozoan, is to get to the egg as soon as possible and fertilize it. Sperm cells would be expected to have a lot of

How does facilitated diffusion differ from simple diffusion?

Which of the following contains an unusual double membrane?

Which statement is true about cells?

Photo Credit: Steve Gschmeissner / Photo Researchers, Inc. Figure 3-1 A Red Blood Cell Use Figure 3-1 to answer the following question: -Choose the correct description for the preceding image.

The process by which cells become specialized is called

Figure 3-7 Translation Use Figure 3-7 to answer the following questions: -Determine the identity of the structure labeled #7. The structure contains the specific base sequence AUG, which codes for

Flu viruses enter into a prospective host cell (along the respiratory tract)and direct it to produce many copies of the viruses. As those viruses bud off of the infected cell, they take the cell membrane of the host cell with them. How might this kill the host cell?