ATI RN
Chapter 3 Cells and Tissues Review Questions Answers Questions
Question 1 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 2 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 3 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.
Question 4 of 5
The chromosomes lengthen and become chromatin and the nuclear envelop reforms during of mitosis.
Correct Answer: B
Rationale: In telophase, chromosomes unwind into chromatin and the nuclear envelope reforms.
Question 5 of 5
Identify the subatomic particle that is negatively charged.
Correct Answer: A
Rationale: Electrons carry a negative charge, unlike protons (positive) and neutrons (neutral).