Chapter 3

Front 1

Which of the following statements best describes the fluid mosaic model of the plasma membrane?

Back 1

a lipid bilayer with protein molecules dispersed within it

Front 2

Which item below is NOT a function or role performed by proteins found in the plasma membrane?

Back 2

synthesis of proteins

Front 3

In which stage of mitosis do the chromosomes align along the cell equator?

Back 3

metaphase

Front 4

Lysosomes perform which of the following cellular functions?

Back 4

intracellular digestion

Front 5

Which of the following organelles produces secretory vesicles?

Back 5

golgi apparatus

Front 6

Which type of membrane transport process uses ATP as a source of energy?

Back 6

primary active transport

Front 7

Which of the following organelle maintains cell shape, supports cellular structures, and generates cell movements?

Back 7

cytoskeleton

Front 8

Which of the following organelles is responsible for generating most of the energy the cell uses to perform work?

Back 8

mitochondrion

Front 9

Which of the following organelles possesses oxidase enzymes that function in neutralizing harmful free radicals?

Back 9

peroxisome

Front 10

Which of the following organelles serves as the site of protein synthesis?

Back 10

ribosome

Front 11

Which of the following molecular components of the lipid bilayer of the plasma membrane possesses a charged polar "phosphate" head and uncharged nonpolar fatty acid "tails"?

Back 11

phospholipid

Front 12

Which nucleic acid molecules are involved in transcription but not translation in the synthesis of a particular polypeptide?

Back 12

DNA

Front 13

The mRNA start codon, AUG, matches up with a tRNA anticodon,

Back 13

UAC

Front 14

Which of the following cell structures are involved in propelling substances across cell surfaces?

Back 14

cilia

Front 15

Which of the following cell structures is the largest organelle in the cell and functions as the control center of the cell?

Back 15

nucleus

Front 16

Which of the following is the correct sequence for the stages of mitosis?

Back 16

prophase, metaphase, anaphase, telophase

Front 17

Which of the following transport mechanisms specifically involves the movement of water?

Back 17

osmosis

Front 18

Cells may said to be "sugar-coated" because of the presence of

Back 18

glycocalyx

Front 19

Proteins in the cell membrane that bind hormones and relay messages into the interior of the cell

Back 19

perform a function known as signal transduction

Front 20

Definite changes in the ___________ of the cell membrane can be seen in a cell that is becoming cancerous

Back 20

glyococalyx

Front 21

All of the following cells are considered "footloose", as they lack cellular junctions, EXCEPT

Back 21

epithelial cells

Front 22

Which of the following are considered anchoring junctions?

Back 22

desmosomes

Front 23

Simple diffusion is best described as substances

Back 23

moving passively down a concentration gradient

Front 24

Crenation takes places when a cell is placed in a(n)

Back 24

hypertonic solution

Front 25

Vesicular transport is involved in all of the following transport processes EXCEPT

Back 25

solute pumps

Front 26

The resting membrane potential is mainly determined by

Back 26

the differential permeability of the plasma membrane to K+ and other ions

Front 27

All of the following are functions of membrane receptors EXCEPT

Back 27

cell adhesion

Front 28

Cristae are found in which of the following cell organelles?

Back 28

the mitochondria

Front 29

The underlying cause of Tay-Sachs disease is

Back 29

the lack of the enzymes needed to break down a glycolipid abundant in nerve cell membranes

Front 30

Which of the following types of RNA contains regions that act as a switch to turn protein synthesis on and off for the protein they code for?

Back 30

riboswitches

Front 31

The basic structural and functional unit of living organisms is the

Back 31

cell

Front 32

The outer boundary of a human cell is the

Back 32

plasma membrane

Front 33

Which of the following would NOT be found in the plasma membrane of a human cell?

Back 33

RNA

Front 34

Tight junctions

Back 34

prevent molecules from passing through the extracellular space between adjacent cells

Front 35

Desmosomes

Back 35

anchor junctions found in areas subjected to pulling forces

Front 36

Gap junctions

Back 36

important for cell communication

Front 37

Water can pass via osmosis through the lipid bilayer

Back 37

true

Front 38

Osmosis is

Back 38

the diffusion of water across a semi-permeable membrane

Front 39

Which of the following is a correct match regarding active/passive transport processes?

Back 39

exocytosis: active membrane transport process

Front 40

A cell will swell, and likely burst, if it is placed in __________ solution

Back 40

a hypotonic

Front 41

Primary active transport is driven by secondary active transport

Back 41

false

Front 42

Pinocytosis is a type of

Back 42

endocytosis

Front 43

Cells of the body mainly use _________ for the selective endocytosis of most macromolecules

Back 43

receptor-mediated endocytosis

Front 44

At rest, the plasma membranes of most body cells are NOT polarized

Back 44

false

Front 45

The primary site of cellular ATP production in most cells is the

Back 45

mitochondrion

Front 46

Ribosomes are found

Back 46

in the cytosol and on the rough endoplasmic reticulum

Front 47

Ribosome

Back 47

synthesizes proteins

Front 48

Nucleolus

Back 48

synthesizes ribosomes

Front 49

Endoplasmic reticulum

Back 49

fold, package, and modify proteins

Front 50

Peroxisomes

Back 50

neutralize dangerous free radicals

Front 51

Cytoskeleton

Back 51

support cellular structures

Front 52

Lysosomes

Back 52

contain digestive enzymes

Front 53

DNA is replicated during the __________ phase of the cell cycle

Back 53

S

Front 54

A gene is best defined as

Back 54

a segment of DNA that carries out instructions for the production of one polypeptide chain

Front 55

During transcription,

Back 55

DNA is used as a template to make RNA