Question: The plasma membrane is mostly made of molecules that have hydrophilic heads and hydrophobic tails. These molecules are called

Answer Choices:
glycolipids
lipoproteins
glycoproteins
proteoglycans
phospholipids

Answer: phospholipids

 

Question: The term ___ refers to a membrane that allows some things to pass through it, but not others.

Answer Choices:
specificity
glycocalyx
carrier-mediated
phospholipid bilayer
selectively permeable

Answer: selectively permeable

 

Question: White blood cells engulf bacteria by means of ___.

Answer Choices:
receptor-mediated endocytosis
cotransport
phagocytosis
active transport
pinocytosis

Answer: phagocytosis

 

Question: The flat-shaped cells found covering the skin are ___ in shape

Answer Choices:
squamous
cuboidal
cylindrical
columnar
spherical

Answer: squamous

 

Question: Which of the following organelles sorts, cuts, splices, and packages newly formed proteins into membrane-bound vesicles?

Answer Choices:
Mitochondrion
Golgi complex
Rough ER
Nucleolus
Smooth ER

Answer: Golgi complex

 

Question: The most abundant molecules in the plasma membrane are

Answer Choices:
phospholipids
glycolipids
cholesterol molecules
proteins
prostaglandins

Answer: phospholipids

 

Question: Muscle cells contain numerous ___ to serve their high demand for ATP.

Answer Choices:
mitochondria
lysosomes
Golgi vesicles
ribosomes
inclusions

Answer: mitochondria

 

Question: Which of the following is not one of the three basic components of a cell?

Answer Choices:
Plasma membrane
None of these are basic components of a cell
Nucleus
Cytoplasm
Interstitial fluid

Answer: Interstitial fluid

 

Question: Which organelle is most active in causing programmed cell death?

Answer Choices:
Rough endoplasmic reticulum
Centriole
Mitochondrion
Lysosome
Nucleus

Answer: Mitochondrion

 

Question: Proteins that do not protrude into the phospholipid bilayer but adhere to the surface of the plasma membrane are called

Answer Choices:
transmembrane proteins
peripheral proteins
channel proteins
lipoproteins
glycoproteins

Answer: peripheral proteins

 

Question: Active transport moves substances ___ their concentration gradient and requires ___ transport.

Answer Choices:
down; passive transport
down; active transport
up; passive transport
up; active transport
across; facilitated diffusion

Answer: up; active transport

 

Question: The fluid outside of a cell is called ___

Answer Choices:
intracellular fluid
nucleoplasm
cytosol
cytoplasm
extracellular fluid

Answer: extracellular fluid