Biology Quiz 3

Front 1

imange that you are late for a date and you reach your friend's door out of breath becuase you ran the last 3 blocks from the bus stop. In a lame effort to impress and to try and make your date forget that you are half an hour late, you descrie what oxygen is used for in your cells. Which of the following is correct?

Back 1

the mitochondria in my muscle cells need this extra oxygen to break down sugars and produce te energy I need to run.

Front 2

the concentration of sodium ions is lower in the cytoplasm of a heart muscle cell that it is in the extracellular fluid. by what mechanism does the cell maintain this difference?

Back 2

active transport

Front 3

what generiization can you make about cytoskeleton?

Back 3

a variety of cytosketel elements are integral in the preformance of numerous essential cellular functions

Front 4

during endocytosis, the contents of the endocytic vesicle________

Back 4

enters the cell

Front 5

When placed in a certain sucrose solution, the volume of a cell decreases; therefore, the sucrose solution is __________ to the cell contents.

Back 5

hypertonic

Front 6

In osmosis, water diffuses from the side of the membrane with a higher concentration of water to the side with a lower concentration of water. What determines the concentration of water in a solution?

Back 6

the amount of molecules other than water dissolved in the solution

Front 7

Which of the following lists the correct order in which newly synthesized proteins are delivered to the plasma membrane?

Back 7

from the endoplasmic reticulum to the Golgi apparatus to the plasma membrane

Front 8

Why are living cells limited to remaining microscopic in size?

Back 8

exchanges of substances at the membrane surface would take too long to diffuse throughout the interior of the cell

Front 9

Which of the following structures are not found in all cells? Select the best answer.

Back 9

cell wall

Front 10

Sorting and modification of proteins is an important function of __________.

Back 10

the Golgi complex

Front 11

Two types of connections between cells called "gap junctions" and "plasmodesmata" are specialized to __________.

Back 11

permit the passage of substances (e.g., ions) between cells through small passageways that directly link the cytoplasm of one cell to the cytoplasm of another cell

Front 12

The fluid mosaic model describes membranes as fluid because ___________.

Back 12

the phospholipids and proteins move from place to place within the bilayer

Front 13

Diffusion is the movement of molecules from __________.

Back 13

an area of higher concentration of that type of molecule to an area of lower concentration

Front 14

Which of the following correctly lists organelles that are part of the internal membrane system of eukaryotic cells?

Back 14

endoplasmic reticulum, Golgi apparatus, and vesicles

Front 15

Which organelle would you expect to be in abundance in the liver of a drug addict?

Back 15

smooth endoplasmic reticulum

Front 16

Facilitated diffusion requires __________.

Back 16

a membrane transport protein and a concentration gradient

Front 17

Prokaryotic cells __________.

Back 17

possess a single strand of DNA, but no definable membrane-enclosed nucleus