Chapter 3 Quiz

Question 1

know how to label the cell

Answer 1

page 63

Question 2

know how to label plasma membrane

Answer 2

page 64

Question 3

simple diffusion

Answer 3

nonpolar and lipid soluble substances diffuse directly through the lipid bi layer

Question 4

which of the following would not diffuse through the plasma membrane by means of simple diffusion?

Answer 4

glucose

Question 5

which cell component helps to maintain the structural integrity of the cell?

Answer 5

cytoskeleton

Question 6

cytoskeleton

Answer 6

it acts as cells bones, muscles and ligaments by supporting cellular structures and providing the machinery to generate various cell movements

Question 7

During which phase of the cell cycle does DNA duplication, or replication, take place?

Answer 7

Interphase

Question 8

When a double helix of DNA is replicated, two complete helices are formed. Together, these helices are called sister __________.

Answer 8

chromatids

Question 9

During which phase of mitosis do sister chromatids line up at the center of the cell?

Answer 9

metaphase

Question 10

During which phase of mitosis do the sister chromatids move apart?

Answer 10

anaphase

Question 11

During which phase of mitosis do nuclear envelopes and the nucleoli reappear?

Answer 11

Telophase

Question 12

During which phase of mitosis do the nuclear envelope and nucleoli disappear?

Answer 12

prophase

Question 13

What is the name of the process by which the cytoplasm divides in two?

Answer 13

cytokinesis

Question 14

A primary active transport process is one in which __________.

Answer 14

molecules move through transport proteins that have been activated by ATP

Question 15

Some transport processes use transport proteins in the plasma membrane, but do not require ATP. This type of transport is known as _____.

Answer 15

facilitated diffusion

Question 16

The majority of water molecules moving across plasma membranes by osmosis do so via a process that is most similar to ____.

Answer 16

facilitated diffusion

Question 17

The sodium-potassium pump uses ATP to move sodium and potassium ions across the plasma membrane. This statement describes _____.

Answer 17

primary active transport

Question 18

A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. This statement describes _____.

Answer 18

exocytosis

Question 19

Solutions with a higher concentration of solutes than the concentration inside the cells are __________.

Answer 19

hypertonic

Question 20

Which organelle is responsible for synthesizing proteins?

Answer 20

ribosomes

Question 21

After DNA replication is completed, each DNA double helix consists of ______.

Answer 21

one old parent strand and one new daughter strand

Question 22

What must happen before a body cell can begin mitotic cell division?

Answer 22

Its DNA must be replicated exactly so that identical copies of the cell’s genes can be passed on to each of its offspring.

Question 23

The plasma membrane is made primarily of ________.

Answer 23

phospholipids

Question 24

Which mechanism requires energy input by the cell in the form of ATP hydrolysis?

Answer 24

page 69 NONE OF THE MECHANISMS REQUIRE ENERGY INPUT

Question 25

A red blood cell placed in pure water would ________.

Answer 25

swell and burst

Question 26

Which vesicular transport process occurs primarily in some white blood cells and macrophages?

Answer 26

phagocytosis

Question 27

Lysosomes perform digestive functions within a cell.

Answer 27

True

Question 28

What is the primary function of the mitochondria?

Answer 28

They are the main sites of ATP production.

Question 29

Which of the following is characteristic of cilia?

Answer 29

They are whiplike, motile cellular extensions that occur in large numbers on the exposed surfaces of certain cells.

Question 30

Which of the following is a function of the rough endoplasmic reticulum?

Answer 30

synthesis of the cell's membranes

Question 31

Houses DNA and RNA.

Answer 31

nucleus

Question 32

Dense spherical bodies in the nucleus that are the synthesis site for ribosomal RNA.

Answer 32

nucleoli

Question 33

Hollow cytoskeletal elements that act as organizers for the cytoskeleton.

Answer 33

microtubules

Question 34

The actual site of protein synthesis.

Answer 34

ribosomes

Question 35

Plays a role in the synthesis of steroid-based hormones and proteins

Answer 35

endoplasmic reticulum

Question 36

what is the function of the cell membrane?

Answer 36

defines extent of a cell; separating two of the bodies major fluid components. intracellular on the inside and extracellular on the outside

Question 37

what is the membrane constructed of ?

Answer 37

phospholipids, glycolipids, cholesterol and lipid rafts

Question 38

hydrophilic

Answer 38

water lover; polar head that is charged

Question 39

hydrophobic

Answer 39

fear of water; uncharged non polar tail

Question 40

function of the phospholipids in the membrane

Answer 40

hydrophobic heads lie on the surface of both intercellular and extracellular surface and the hydrophobic lie in the middle; self-assemble into closed generally spherical structures to reseal themselves when torn

Question 41

what is the function of glycolipids?

Answer 41

are lipids attached with sugar groups; polar; 5% of the membrane

Question 42

what is the function of cholesterol in the membrane?

Answer 42

20% of the membrane; has a polar region and a nonpolar region; it stabilizes the membrane while decreasing the mobility of the phospholipids and the fluidity of the membrane

Question 43

membrane proteins

Answer 43

allows communication with the environment