bio test

Which list describes the organization within multicellular organisms from least complex to most complex?

Proteins, organelles, cells, organisms

Which of the following is NOT a class of proteins?

Division

Complex arrangements of proteins that move sideways through the membrane, led scientists refer to the structure of the cell membrane as

a fluid mosaic model

The diffusion of water is also called

osmosis

The cell membrane consists mainly of

phospholipids and proteins

What is the major function of the cell membrane?

to control what substances move in and out

Which of the following is NOT a protein?

Glucose

Diffusion is best described as

The movement of molecules from an area of high concentration to an area of low concentration

What would happen to a saltwater protozoan if it is removed from its normal habitat and placed into a freshwater pool?

Gain of water through osmosis

Which statement best describes a key role of lipids (phospholipids) within a cell?

They are the main structural component of membranes

Which drawing best illustrates how this plant cell will appear after it is placed in a solution that has a higher concentration of dissolved substances that the cell?

Which part of the cell membrane is the arrow pointing to?

A protein channel

What process moves gases such as oxygen through the cell membrane, as shown in the drawing?

Diffusion

A student observed this animal cell under a microscope:

After adding a drop of solution, the student observed that the cell burst, as shown below: (ANOTHER IMAGE I CAN’T ADD)

The concentration of dissolved substances in the cell was HIGHER than in the solution so water entered the cell

Receptor proteins…

are involved in cell-to-cell communication

What part of the cell is the arrow pointing to?

Phospholipid (lipid)

Which diagram best represents the cell membrane?

A vesicle fuses with the cell membrane and as a result waste is released from the cell in the process of

exocytosis

All of the following are true of the sodium-potassium pump EXCEPT:

the cell forces sodium in and potassium out all of the time

Facilitated diffusion is required for

all of these are correct

When exposed to high heat, catalase

becomes denatured

Enzymes are a class of protein that ____ chemical reactions

catalyze

Enzymes are a class of protein that ________ chemical reactions

catalyze