Chapter 01: Cellular Biology

Huether & McCance: Understanding Pathophysiology, 6th Edition

MULTIPLE CHOICE

1. A student is observing a cell under the microscope. It is observed to have supercoiled DNA

with histones. Which of the following would also be observed by the student?

a. A single circular chromosome

b. A nucleus

c. Free-floating nuclear material

d. No organelles

ANS: B

The cell described is a eukaryotic cell, so it has histones and a supercoiled DNA within its

nucleus; thus, the nucleus should be observed. A single circular chromosome called a

prokaryote contains free-floating nuclear material but has no organelles.

REF: p. 2

2. A nurse is instructing the staff about cellular functions. Which cellular function is the nurse

describing when an isolated cell absorbs oxygen and uses it to transform nutrients to energy?

a. Metabolic absorption

b. Communication

c. Secretion

d. Respiration

ANS: D

The cell’s ability to absorb oxygen is referred to as respiration while its communication ability

involves maintenance of a steady dynamic state, metabolic absorption provides nutrition, and

secretion allows for the synthesizing of new substances.

REF: p. 2

3. A eukaryotic cell is undergoing DNA replication. In which region of the cell would most of

the genetic information be contained?

a. Mitochondria

b. Ribosome

c. Nucleolus

d. Nucleus Cytoplasm

ANS: C

The region of the cell that contains genetic material, including a large amount of ribonucleic

acid, most of the DNA, and DNA-binding proteins, is the nucleolus, which is located within

the cell’s nucleus. Mitochondria is associated with cellular respiration, while ribosomes are

involved with protein manufacturing. Cytoplasm is a fluid filling that is a component of the

cell.

REF: p. 2