ATI RN
ATI RN Test Bank
Cells Tissues and Organs Comprehension Questions Questions
Question 1 of 5
Different isotopes of a particular element have different numbers of
Correct Answer: C
Rationale: Isotopes vary in neutron number but have the same proton number (atomic number).
Question 2 of 5
Normal blood pH is:
Correct Answer: D
Rationale: Normal blood pH is tightly regulated at ~7.35-7.45, averaging 7.4.
Question 3 of 5
The macromolecule that contains the most energy per gram is:
Correct Answer: B
Rationale: Lipids yield ~9 kcal/g, higher than carbohydrates or proteins (~4 kcal/g).
Question 4 of 5
The sequence of amino acids in a polypeptide is the structure.
Correct Answer: D
Rationale: Primary structure is the linear sequence of amino acids.
Question 5 of 5
The genetic code tells cells how to make
Correct Answer: C
Rationale: The genetic code (DNA/RNA) specifies amino acid sequences for proteins.