Exam 3: Cells: the Living Units

Myocardium (cardiac muscle tissue)must rhythmically contract for a lifetime.This requires a considerable amount of energy production by the cells.You would expect to see a relatively high amount of which organelle in these cells?

A gene can best be defined as ________.

Which of the following statements is correct regarding RNA?

A type of transport protein found in the plasma membrane of cells lining the inside of the intestine allows sodium ions to diffuse down their concentration gradient.The ions move through the transport protein,and into the cell.These transport proteins will use the kinetic energy of the diffusing sodium ions to bring glucose into the cells as well.Which of the following would stop transport of glucose through this transport protein?

Which of the following is a function of a plasma membrane protein?

Match the following: -Chromosomes uncoil to form chromatin.

What are cell exons and introns?

A type of transport protein found in the plasma membrane of cells lining the inside of the intestine allows sodium ions to diffuse down their concentration gradient.The ions move through the transport protein,and into the cell.These transport proteins will use the kinetic energy of the diffusing sodium ions to bring glucose into the cells as well.This transport protein would best be described as ________.

Microfilaments are thin strands of the contractile protein composed of myosin.

Figure 3.2 Using Figure 3.2, match the following: -Peripheral protein.

The functions of centrioles include ________.

Concentration differences cause ionic imbalances that polarize the cell membrane,and active transport processes.

Osmosis is the passive movement of water but it follows almost completely opposite laws of physics when compared to the diffusion of ions or other small particles.

Match the following: -Nuclear membrane and nucleolus disintegrate.

Match the following: -Chromosomes align on the spindle equator.

Other than the nucleus,which organelle has its own DNA?

Match the following: -Chromosomal centromeres split and chromosomes migrate to opposite ends of the cell.

The speed of individual particle diffusion is influenced by temperature and particle size,not by concentration.

Which of the following structures would aid a cell in allowing more nutrients to be absorbed by the cell?

Figure 3.1 Using Figure 3.1, match the following: -Site of enzymatic breakdown of phagocytized material.