ATI RN
Chapter 3 Cells and Tissues Review Questions Answers Questions
Question 1 of 5
Classification of epithelia is based on the number of layers of cells and on the:
Correct Answer: A
Rationale: Epithelia are classified by layers (simple/stratified) and cell shape (squamous, cuboidal, columnar).
Question 2 of 5
Because the proteins embedded in the phospholipid bilayer of the plasma membrane can change their positions by moving laterally, this model of the plasma membrane structure is called the model.
Correct Answer: D
Rationale: The fluid-mosaic model describes the dynamic, fluid nature of the phospholipid bilayer with mobile proteins.
Question 3 of 5
The function of the rough endoplasmic reticulum is and the function of the smooth endoplasmic reticulum is
Correct Answer: C
Rationale: Rough ER modifies proteins; smooth ER synthesizes phospholipids and steroids.
Question 4 of 5
In active transport, materials move from concentration to concentration.
Correct Answer: A
Rationale: Active transport moves materials against their concentration gradient, from lower to higher, using energy.
Question 5 of 5
A sequence of three bases on DNA is called a , while the complementary three bases on mRNA is called a(n)
Correct Answer: B
Rationale: A triplet is three bases on DNA; a codon is the complementary three bases on mRNA.