Quiz 3 class Flashcards

During the G1 phase of the cell cycle:

A. Growth and normal metabolism occur

B. The DNA replicates

C. The nuclear membrane disappears

D. The centrioles separate

Facilitated diffusion differs from ordinary diffusion in that

A. Facilitated diffusion never eliminates the concentration gradient

B. Facilitated diffusion moves molecules from an area of higher concentration to
lower concentration.

C. The rate of molecular movement is not limited by the number of available carrier molecules.

D. Facilitated diffusion consumes no ATP.

E. The rate of molecular movement is limited by the number of available carrier
molecules

The control center for cellular operations is the

A. Mitochondria

B. Golgi Apparatus

C. Endoplasmic Reticulum

D. Nucleus

E. Ribosome

Lysosomes function in:

A. Formation of new cell membrane

B. Synthesis of proteins

C. Digestion of foreign material

D. Synthesis of lipids

Mitochondria are called the 'powerhouse' of the cell because their main
function is:

A. Generating ATP

B. Producing lipids

C. Hydrolysis

D. Protein Synthesis

Which organelle is most prominent in cells that make large amounts of
protein?

A. Nucleolus

B. Nucleus

C. Mitochondria

D. Chromosome

E. Proteasome

During this phase of cell division, the chromosomes uncoil, the nuclear
membrane forms, and cytokinesis occurs.

A. Metaphase

B. Anaphase

C. Interphase

D. Prophase

E. Telophase

The movement of water across a semi-permeable (selectively permeable)
membrane is:

A. Diffusion

B. Osmosis

C. Endocytosis

D. Facilitated Diffusion

A transport process that does not require the expenditure of cellular energy
is:

A. Phagocytosis

B. Receptor Mediated Endocytosis

C. Facilitated Diffusion

D. Active Transport

The plasma (cell) membrane

A. Is composed of a bilayer of proteins

B. Is composed of a bilayer of phospholipids

C. Is composed of chains of carbohydrate molecules

D. Is a complex of carbohydrates and proteins

Which of the following components of the cytoskeleton form the mitotic
spindle fibers during mitosis?

A. Microtubules

B. Microfilaments

C. Intermediate Filaments

D. Thick Filaments

Crenation of a cell may occur when it is placed in a(n)________ solution

A. Neutral

B. Isotonic

C. Hypertonic

D. Hypotonic

During mitosis, two daughter cells form, each of which has

A. A lesser number of chromosomes than the original cell.

B. A different number of chromosomes than the original cell

C. Twice as many chromosomes as the original cell.

D. Half as many chromosomes as the original cell.

the same number of chromosomes as the original cell

The potential difference across the cell membrane is due to the separation
of

A. Cations and Anions

B. Phospholipids and proteins

C. Acids and bases

D. Carbohydrate molecules

E. Water molecules

Which of the following is not a function of membrane proteins?

A. Act as carrier molecules for various solutes

B. Cell nutrient

C. Act as anchors or stabilizers for the cell membrane

D. Regulate the passage of ions

E. Bind to ligands

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

A. Prophase

B. Telophase

C. Interphase

D. Metaphase

E. Anaphase

Some of the endoplasmic reticulum appears rough because

A. Large proteins are attached to its surface

B. It is still in the process of formation

C. Ribosomes are attached to the surface

D. It is digesting molecules

The DNA of the cell replicates itself during:

A. Prophase

B. Telophase

C. Interphase

D. Metaphase

Cellular materials are packaged for secretion by the

A. Nucleoli

B. Golgi Complex

C. Ribosomes

D. Smooth ER

During mitosis, chromatids separate into daughter chromosomes during

A. Telophase

B. Interphase

C. Metaphase

D. Anaphase

E. Prophase