21) This organelle is primarily a sac of powerful digestive enzymes called acid hydrolases.
A) Golgi apparatus
B) lysosome
C) rough endoplasmic reticulum
D) mitochondria
E) peroxisome
22) This organelle is defective in the inherited disorder Tay-Sachs disease.
A) Golgi apparatus
B) lysosome
C) rough endoplasmic reticulum
D) mitochondria
E) peroxisome
23) This organelle is numerous in liver and kidney cells.
A) Golgi apparatus
B) lysosome
C) rough endoplasmic reticulum
D) mitochondria
E) peroxisome
24) This organelle produces ATP molecules.
A) Golgi apparatus
B) lysosome
C) rough endoplasmic reticulum
D) mitochondria
E) peroxisome
25) This organelle contains a single DNA molecule and is capable of self-replication.
A) Golgi apparatus
B) lysosome
C) rough endoplasmic reticulum
D) mitochondria
E) peroxisome
26) Mitosis refers only to nuclear division. Separation of the entire cell following mitosis is
A) meiosis.
B) karyokinesis.
C) cytokinesis.
D) telophase.
27) Phospholipids of the plasma membrane are arranged
A) around a central layer of cholesterol.
B) in a single layer with polar heads facing outwards.
C) as a bilayer with their nonpolar tails sandwiched between the polar heads.
D) as a bilayer with their polar heads sandwiched between the nonpolar tails.
28) Which of the following cytoskeleton elements are the largest in diameter?
A) microtubules
B) microfilaments
C) intermediate filaments
D) centrioles
29) Which of the following statements about integral proteins in the plasma membrane is
false?
A) Most extend all the way through the membrane.
B) Some attach to the glycocalyx.
C) They determine which molecules are transported through the membrane.
D) They are more abundant by volume than the membrane phospholipids.
30) Which type of endocytosis ingests the most specific type of molecule?
A) fluid-phase endocytosis
B) phagocytosis
C) pinocytosis
D) receptor-mediated endocytosis