Rio Salado Bio156 Lesson 3-4

Front 1

Light microscopes

Back 1

use light and glass lenses to magnify an image.

Front 2

A scanning electron microscope is used to study __________, whereas a transmission electron microscope is used to study __________.

Back 2

cell surfaces . . . internal cell structures

Front 3

Which of the following statements is consistent with the Cell Theory?

Back 3

The cell is the basic structural and functional unity of life.

Front 4

We can characterize the fluid mosaic model of a membrane as ____________ floating in a sea of ___________

Back 4

proteins; lipid

Front 5

Large, round cells can overcome surface area to volume problems by

Back 5

becoming smaller, narrower or flatter.

Front 6

As cell size increases, the

Back 6

volume increases faster than the surface area.
v^3 sa^2

Front 7

Cells that lack a membrane-bound nucleus are __________ cells.

Back 7

prokaryotic

Front 8

The membranous compartmentalization of a cell

Back 8

allows different metabolic processes to occur simultaneously.

Front 9

If a biologist said that eukaryotic cells get their power from bacteria, they would be referring to

Back 9

the mitochondria in our cells that may have originated as endosymbiotic bacteria.

Front 10

Long fibers of DNA and protein are called a

Back 10

chromatin

Front 11

Smooth endoplasmic reticulum

Back 11

stores calcium ions in muscle cells.

Front 12

Secretory proteins are

Back 12

released from the cell through the plasma membrane.

Front 13

The Golgi apparatus

Back 13

stores, modifies, and packages proteins.

Front 14

Lysosomes
help to digest worn-out or damaged organelles.
recycle materials within the cell.
fuse with food vacuoles to expose nutrients to lysosomal enzymes.
destroy harmful bacteria engulfed by white blood cells.

Back 14

all)
help to digest worn-out or damaged organelles.
recycle materials within the cell.
fuse with food vacuoles to expose nutrients to lysosomal enzymes.
destroy harmful bacteria engulfed by white blood cells.

Front 15

Contractile vacuoles

Back 15

prevent cells from bursting as a result of the influx of excess water.

Front 16

Cilia differ from flagella in that

Back 16

cilia are typically more numerous and shorter than flagella.

Front 17

Plants with rigid cell walls are unable to do which process?

Back 17

phagoctyosis
process by which certain living cells called phagocytes ingest or engulf other cells or particles

Front 18

Which of the following cell structures is not associated with the breakdown of harmful substances or substances that are no longer needed by the cell?
lysosomes
mitochondria
peroxisomes
vacuoles

Back 18

mitochondria

Front 19

Small, nonpolar, hydrophobic molecules such as fatty acids

Back 19

easily pass through a membrane's lipid bilayer.

Front 20

Membrane phospholipids
have hydrophobic heads that face the center of the membrane and are shielded from water.
have hydrophilic tails that face outward and are exposed to water.
often have "kinks" in their tails caused by the presence of a single rather than a double bond between carbons.
remain fluid because they are tightly packed against one another.
None of the choices are correct.

Back 20

None of the choices are correct.

Front 21

Which one of the following is not a function of membrane proteins?
serve as enzymes.
attach the membrane to the cytoskeleton.
provide cellular identification tags.
form junctions between cells.
All of the choices are membrane protein functions.

Back 21

All

Front 22

Diffusion does not require the cell to expend ATP. Therefore, diffusion is considered a type of

Back 22

passive transport.

Front 23

If you were to transfer a saltwater, single-celled protist to fresh water, which of the following is likely to happen?

Back 23

The cell will swell and burst

Front 24

Osmosis can be defined as

Back 24

the diffusion of water across a membrane.

Front 25

If you were to transfer a freshwater, single-celled protist to saltwater, which of the following is likely to happen?

Back 25

The cell will shrink.

Front 26

Which of the following statements is true?
Cells placed in an isotonic solution will swell.
Cells placed in a hypotonic solution will swell.
Cells placed in a hypotonic solution will shrink.
Cells placed in a hypotonic solution will remain the same size.

Back 26

Cells placed in a hypotonic solution will swell.

Front 27

A cell that has neither a net gain nor a net lose of water when it is immersed in a solution is

Back 27

isotonic to its environment

Front 28

Active transport
uses ATP as an energy source.
can move solutes up a concentration gradient.
requires the cell to expend energy.
is necessary to allow nerves to function properly.
All of the choices are correct.

Back 28

all

Front 29

The act of a white blood cell engulfing a bacterium is

Back 29

phagocytosis

Front 30

Phagocytosis is to eating as pinocytosis is to

Back 30

drinking