ATI RN
Cells and Tissues Multiple Choice Questions Questions
Question 1 of 5
What type of bond is formed when two atoms share electrons equally?
Correct Answer: C
Rationale: Non-polar covalent bonds (e.g., H2) share electrons equally between identical atoms.
Question 2 of 5
The macromolecule that has functions that include formation of the majority of membranes, hormones and a primary long-term energy storage molecule is:
Correct Answer: B
Rationale: Lipids form membranes (phospholipids), hormones (steroids), and store energy (fats).
Question 3 of 5
The building blocks of proteins are
Correct Answer: B
Rationale: Amino acids are the monomers linked to form proteins.
Question 4 of 5
In DNA, adenine is always paired with
Correct Answer: B
Rationale: Adenine pairs with thymine in DNA via two hydrogen bonds.
Question 5 of 5
What type of epithelium is found in blood capillaries and lung alveoli where simple diffusion occurs?
Correct Answer: C
Rationale: Simple squamous epithelium, thin and flat, facilitates diffusion in capillaries and alveoli.