Exam 3: The Cellular Level of Organization

The stage in a cell's life cycle in which the cell performs its normal functions and prepares for division is called

Organelles that break down fatty acids and hydrogen peroxide are

The transmembrane potential in an undisturbed cell is called its ________.

The DNA molecule is like a twisted ladder. What molecules form the "sides" of the DNA ladder?

Molecular motors that carry materials in opposite directions along microtubules are called

Masses of insoluble material that are sometimes found in cytosol are known as ________.

In cells that are not dividing,chromosomes uncoil to form a tangle of fine fibers known as ________.

Which of following properties of microtubules is true?

________ cells are all of the cells of the body except the reproductive cells (sperm and oocytes).(Note: Be sure to capitalize the first letter of your answer).

Figure 3-2 The Plasmalemma Use Figure 3-2 to answer the following questions: -What part of the plasmalemma is hydrophobic?

Nuclear division of somatic cells is known as ________.

Which of these transport processes always requires metabolic energy?

In order to maintain cellular homeostasis,an exchange pump ejects ________ ions from the cell and imports ________ ions.

Histones are found in

The plasmalemma includes

Figure 3-1 The Anatomy of a Representative Cell Use Figure 3-1 to answer the following questions: -Which organelle renews the cell membrane and modifies and packages proteins for secretion?

Some cells contain large numbers of mitochondria while others have relatively few or none.This suggests that

The cytoplasm contains the fluid cytosol and the suspended ________.

The nucleus is surrounded by the ________.

Figure 3-2 The Plasmalemma Use Figure 3-2 to answer the following questions: -Which structure is water most likely to pass through?