ATI RN
Cells and Tissues Questions and Answers Questions
Question 1 of 5
Which of the following does NOT describe a water molecule?
Correct Answer: D
Rationale: Water is covalent and polar but inorganic; it's not ionic (no full electron transfer).
Question 2 of 5
The storage form of glucose in plants is:
Correct Answer: B
Rationale: Starch is the plant polysaccharide for glucose storage.
Question 3 of 5
How many different amino acids can be used to make human proteins?
Correct Answer: C
Rationale: 20 standard amino acids are encoded by the genetic code for human proteins.
Question 4 of 5
The shape of the DNA molecule is described as a
Correct Answer: A
Rationale: DNA's double helix structure was described by Watson and Crick.
Question 5 of 5
What type of epithelium makes up the outer layer of the skin where protection is important?
Correct Answer: B
Rationale: Stratified squamous epithelium, multi-layered and tough, protects the skin.