Q1. DNA
a. is one of the adenosine phosphates.
b. is one of the nucleotide coenzymes.
c. contains protein-building instructions.
d. all of these
e. none of these
Q2. . Which statement is NOT true?
a. Membranes are often perforated by proteins that extend through both sides of the membrane.
b. Some membranes have proteins with channels or pores that allow for the passage of hydrophilic substances.
c. Hydrophilic substances have an easier time passing through membranes than hydrophobic substances do.
d. The current concept of a membrane can be best summarized by the fluid mosaic model.
e. The lipid bilayer serves as a hydrophobic barrier between two fluid regions.
Q3. Which of the following are made of two subunits and are composed of RNA and protein?
a. Golgi
b. mitochondria
c. chloroplasts
d. ribosomes
e. endoplasmic reticula
Q4. These are the primary cellular sites for the recapture of energy from carbohydrates
a. Golgi bodies
b. ribosomes
c. mitochondria
d. lysosomes
e. endoplasmic reticula
Q5. Cell part responsible for maintaining cell shape, internal organization, and cell movements is the
a. vesicle.
b. nucleus.
c. endoplasmic reticulum.
d. cytoskeleton.
e. ribosome.