NURS 6030 EXAM 1 | 653 Questions
and Answers | Complete Solution |
Graduate Nursing | Advanced
Pathophysiology & Pharmacology | Pass
Guaranteed - A+ Graded
## [DOMAIN 1: CELLULAR BIOLOGY, ADAPTATION & INJURY - 120 Questions]
### Cell Structure & Organelles
* *Question 1:** Which cellular organelle is responsible for maintaining cell shape through
microtubules and microfilaments?
. Cytoplasm
A
B. Cytoskeleton **[CORRECT]**
C. Ribosomes
D. Golgi apparatus
* *Rationale:** The cytoskeleton is a network of protein filaments including microtubules and
microfilaments that maintain cell shape, enable cell movement, and facilitate intracellular
transport. Cytoplasm (A) is the colloid solution surrounding organelles but does not provide
structural support. Ribosomes (C) are sites of protein synthesis. Golgi apparatus (D) packages
proteins and enzymes.
---
**Question 2:** What is the primary function of the cell membrane?
. Protein synthesis
A
B. ATP production
C. Semipermeable barrier separating intra/extracellular environments **[CORRECT]**
D. Digestion of foreign substances
,* *Rationale:** The cell membrane is a semipermeable lipid bilayer that separates the
intracellular and extracellular environments, provides receptors for hormones, conducts electric
currents, and enables cell-to-cell recognition. Protein synthesis occurs at ribosomes (A), ATP
production in mitochondria (B), and digestion in lysosomes (D).
---
* *Question 3:** Which organelle serves as the "power plant" of the cell, transforming organic
compounds into ATP?
. Lysosomes
A
B. Mitochondria **[CORRECT]**
C. Smooth ER
D. Nucleus
* *Rationale:** Mitochondria are self-replicating organelles that transform organic compounds
into ATP through oxidative phosphorylation. They also regulate apoptosis (programmed cell
death). Lysosomes (A) contain digestive enzymes, smooth ER (C) synthesizes lipids, and the
nucleus (D) contains DNA.
---
**Question 4:** The rough endoplasmic reticulum is characterized by which feature?
. Major site of lipid synthesis
A
B. Covered in ribosomes; synthesizes and transports proteins **[CORRECT]**
C. Contains digestive enzymes
D. Self-replicating capability
* *Rationale:** Rough ER is studded with ribosomes on its surface and is responsible for
synthesizing and transporting proteins and glycoproteins. Smooth ER (A) is the major lipid
synthesis site. Lysosomes (C) contain digestive enzymes. Mitochondria (D) are self-replicating.
---
* *Question 5:** Which organelle functions as the "quality control" center of the cell and is
involved in programmed cell death?
. Proteasome **[CORRECT]**
A
B. Golgi apparatus
C. Mitochondria
D. Lysosomes
,* *Rationale:** The proteasome degrades damaged or misfolded proteins and plays a critical role
in quality control and programmed cell death. While mitochondria (C) also regulate apoptosis,
the proteasome specifically handles protein quality control. Golgi apparatus (B) packages
proteins, and lysosomes (D) digest cellular debris.
---
**Question 6:** What is the primary function of lysosomes?
. ATP synthesis
A
B. Protein synthesis
C. Break down cell parts and foreign substances using digestive enzymes **[CORRECT]**
D. RNA synthesis
* *Rationale:** Lysosomes contain hydrolytic enzymes that break down cellular waste, damaged
organelles, and foreign substances. ATP synthesis occurs in mitochondria (A), protein synthesis
at ribosomes (B), and RNA synthesis in the nucleolus within the nucleus (D).
---
* *Question 7:** Which structure contains DNA and chromatin and serves as the site of RNA
synthesis?
. Mitochondria
A
B. Nucleus **[CORRECT]**
C. Golgi apparatus
D. Smooth ER
* *Rationale:** The nucleus houses the cell's genetic material (DNA and chromatin) and is the
site of RNA synthesis. It contains the nucleolus and is surrounded by a nuclear envelope. While
mitochondria (A) contain their own DNA, the nucleus is the primary repository of genetic
information.
---
**Question 8:** The smooth endoplasmic reticulum is best described as:
. Covered with ribosomes
A
B. The major site of lipid synthesis **[CORRECT]**
C. Responsible for protein packaging
D. The site of cellular respiration
, * *Rationale:** Smooth ER lacks ribosomes and is the major site of lipid synthesis, including
phospholipids and steroids. Rough ER (A) is covered with ribosomes. Golgi apparatus (C)
packages proteins. Mitochondria (D) are the site of cellular respiration.
---
**Question 9:** Where does protein synthesis occur in the cell?
. Mitochondria
A
B. Lysosomes
C. Ribosomes **[CORRECT]**
D. Smooth ER
* *Rationale:** Ribosomes are the sites of protein synthesis, translating mRNA into polypeptide
chains. They can be free in the cytoplasm or bound to rough ER. Mitochondria (A) produce ATP,
lysosomes (B) digest substances, and smooth ER (D) synthesizes lipids.
---
* *Question 10:** Which organelle works with the endoplasmic reticulum to package proteins,
enzymes, and hormones?
. Mitochondria
A
B. Nucleus
C. Golgi apparatus **[CORRECT]**
D. Proteasome
* *Rationale:** The Golgi apparatus receives proteins from the ER, modifies them, and packages
them into vesicles for transport. Mitochondria (A) produce energy, the nucleus (B) contains
genetic material, and the proteasome (D) degrades proteins.
---
**Question 11:** What substance fills the cell interior surrounding the organelles?
. Cytoskeleton
A
B. Cytoplasm **[CORRECT]**
C. Nucleoplasm
D. Extracellular matrix
* *Rationale:** Cytoplasm is the colloid solution (cytosol) inside the cell that surrounds and
suspends organelles. The cytoskeleton (A) provides structure, nucleoplasm (C) is within the
nucleus, and extracellular matrix (D) is outside the cell.
and Answers | Complete Solution |
Graduate Nursing | Advanced
Pathophysiology & Pharmacology | Pass
Guaranteed - A+ Graded
## [DOMAIN 1: CELLULAR BIOLOGY, ADAPTATION & INJURY - 120 Questions]
### Cell Structure & Organelles
* *Question 1:** Which cellular organelle is responsible for maintaining cell shape through
microtubules and microfilaments?
. Cytoplasm
A
B. Cytoskeleton **[CORRECT]**
C. Ribosomes
D. Golgi apparatus
* *Rationale:** The cytoskeleton is a network of protein filaments including microtubules and
microfilaments that maintain cell shape, enable cell movement, and facilitate intracellular
transport. Cytoplasm (A) is the colloid solution surrounding organelles but does not provide
structural support. Ribosomes (C) are sites of protein synthesis. Golgi apparatus (D) packages
proteins and enzymes.
---
**Question 2:** What is the primary function of the cell membrane?
. Protein synthesis
A
B. ATP production
C. Semipermeable barrier separating intra/extracellular environments **[CORRECT]**
D. Digestion of foreign substances
,* *Rationale:** The cell membrane is a semipermeable lipid bilayer that separates the
intracellular and extracellular environments, provides receptors for hormones, conducts electric
currents, and enables cell-to-cell recognition. Protein synthesis occurs at ribosomes (A), ATP
production in mitochondria (B), and digestion in lysosomes (D).
---
* *Question 3:** Which organelle serves as the "power plant" of the cell, transforming organic
compounds into ATP?
. Lysosomes
A
B. Mitochondria **[CORRECT]**
C. Smooth ER
D. Nucleus
* *Rationale:** Mitochondria are self-replicating organelles that transform organic compounds
into ATP through oxidative phosphorylation. They also regulate apoptosis (programmed cell
death). Lysosomes (A) contain digestive enzymes, smooth ER (C) synthesizes lipids, and the
nucleus (D) contains DNA.
---
**Question 4:** The rough endoplasmic reticulum is characterized by which feature?
. Major site of lipid synthesis
A
B. Covered in ribosomes; synthesizes and transports proteins **[CORRECT]**
C. Contains digestive enzymes
D. Self-replicating capability
* *Rationale:** Rough ER is studded with ribosomes on its surface and is responsible for
synthesizing and transporting proteins and glycoproteins. Smooth ER (A) is the major lipid
synthesis site. Lysosomes (C) contain digestive enzymes. Mitochondria (D) are self-replicating.
---
* *Question 5:** Which organelle functions as the "quality control" center of the cell and is
involved in programmed cell death?
. Proteasome **[CORRECT]**
A
B. Golgi apparatus
C. Mitochondria
D. Lysosomes
,* *Rationale:** The proteasome degrades damaged or misfolded proteins and plays a critical role
in quality control and programmed cell death. While mitochondria (C) also regulate apoptosis,
the proteasome specifically handles protein quality control. Golgi apparatus (B) packages
proteins, and lysosomes (D) digest cellular debris.
---
**Question 6:** What is the primary function of lysosomes?
. ATP synthesis
A
B. Protein synthesis
C. Break down cell parts and foreign substances using digestive enzymes **[CORRECT]**
D. RNA synthesis
* *Rationale:** Lysosomes contain hydrolytic enzymes that break down cellular waste, damaged
organelles, and foreign substances. ATP synthesis occurs in mitochondria (A), protein synthesis
at ribosomes (B), and RNA synthesis in the nucleolus within the nucleus (D).
---
* *Question 7:** Which structure contains DNA and chromatin and serves as the site of RNA
synthesis?
. Mitochondria
A
B. Nucleus **[CORRECT]**
C. Golgi apparatus
D. Smooth ER
* *Rationale:** The nucleus houses the cell's genetic material (DNA and chromatin) and is the
site of RNA synthesis. It contains the nucleolus and is surrounded by a nuclear envelope. While
mitochondria (A) contain their own DNA, the nucleus is the primary repository of genetic
information.
---
**Question 8:** The smooth endoplasmic reticulum is best described as:
. Covered with ribosomes
A
B. The major site of lipid synthesis **[CORRECT]**
C. Responsible for protein packaging
D. The site of cellular respiration
, * *Rationale:** Smooth ER lacks ribosomes and is the major site of lipid synthesis, including
phospholipids and steroids. Rough ER (A) is covered with ribosomes. Golgi apparatus (C)
packages proteins. Mitochondria (D) are the site of cellular respiration.
---
**Question 9:** Where does protein synthesis occur in the cell?
. Mitochondria
A
B. Lysosomes
C. Ribosomes **[CORRECT]**
D. Smooth ER
* *Rationale:** Ribosomes are the sites of protein synthesis, translating mRNA into polypeptide
chains. They can be free in the cytoplasm or bound to rough ER. Mitochondria (A) produce ATP,
lysosomes (B) digest substances, and smooth ER (D) synthesizes lipids.
---
* *Question 10:** Which organelle works with the endoplasmic reticulum to package proteins,
enzymes, and hormones?
. Mitochondria
A
B. Nucleus
C. Golgi apparatus **[CORRECT]**
D. Proteasome
* *Rationale:** The Golgi apparatus receives proteins from the ER, modifies them, and packages
them into vesicles for transport. Mitochondria (A) produce energy, the nucleus (B) contains
genetic material, and the proteasome (D) degrades proteins.
---
**Question 11:** What substance fills the cell interior surrounding the organelles?
. Cytoskeleton
A
B. Cytoplasm **[CORRECT]**
C. Nucleoplasm
D. Extracellular matrix
* *Rationale:** Cytoplasm is the colloid solution (cytosol) inside the cell that surrounds and
suspends organelles. The cytoskeleton (A) provides structure, nucleoplasm (C) is within the
nucleus, and extracellular matrix (D) is outside the cell.
