BIOD 101 MODULE 3 EXAM -
ADVANCED CELL BIOLOGY AND
METABOLISM QUESTIONS & VERIFIED
ANSWERS (A+ GUARANTEE)
1. Which of the following describes the specific function of the nucleolus within the
eukaryotic nucleus?
A. Regulation of nucleocytoplasmic transport through pore complexes.
B. Storage of genetic information in the form of chromatin.
C. Transcription of messenger RNA (mRNA) for protein export.
D. Synthesis of ribosomal RNA (rRNA) and assembly of ribosome subunits.
Answer: D
Conceptual Explanation: The nucleolus is a dense region within the nucleus dedicated to
the synthesis of rRNA and the assembly of large and small ribosomal subunits.
2. A cell that specializes in the detoxification of drugs and the storage of calcium ions would
likely have an abundance of which organelle?
A. Smooth Endoplasmic Reticulum
B. Rough Endoplasmic Reticulum
C. Golgi Apparatus
,D. Lysosomes
Answer: A
Conceptual Explanation: The Smooth ER is responsible for lipid synthesis, detoxification
of toxins, and calcium ion storage, particularly in muscle cells (sarcoplasmic reticulum).
3. Which side of the Golgi apparatus is responsible for receiving vesicles arriving from the
Endoplasmic Reticulum?
A. The trans face
B. The cisternae face
C. The secretory face
D. The cis face
Answer: D
Conceptual Explanation: The cis face of the Golgi is the receiving side, typically located
near the ER, whereas the trans face is the shipping side.
4. What is the primary role of the enzyme Catalase found within peroxisomes?
A. Breaking down fatty acids into smaller molecules.
B. Synthesizing ATP through oxidative phosphorylation.
C. Digestive recycling of old organelles via autophagy.
D. Converting hydrogen peroxide into water and oxygen.
, Answer: D
Conceptual Explanation: Peroxisomes produce hydrogen peroxide as a byproduct of
metabolism; Catalase is essential to break down this toxic byproduct into water and
oxygen.
5. In the fluid mosaic model, what is the primary function of cholesterol within the animal cell
membrane?
A. To act as a transport channel for polar molecules.
B. To serve as a recognition site for cell-to-cell signaling.
C. To stabilize membrane fluidity at varying temperatures.
D. To provide structural support by anchoring to the cytoskeleton.
Answer: C
Conceptual Explanation: Cholesterol acts as a fluidity buffer, preventing the membrane
from becoming too rigid in the cold or too fluid in the heat.
6. Which of the following best describes the movement of molecules via ‘Facilitated
Diffusion’?
A. Movement against the concentration gradient requiring ATP.
B. Movement down the concentration gradient without the use of proteins.
C. Movement down the concentration gradient using specific transport proteins.
D. Bulk transport of large solids into the cell.
ADVANCED CELL BIOLOGY AND
METABOLISM QUESTIONS & VERIFIED
ANSWERS (A+ GUARANTEE)
1. Which of the following describes the specific function of the nucleolus within the
eukaryotic nucleus?
A. Regulation of nucleocytoplasmic transport through pore complexes.
B. Storage of genetic information in the form of chromatin.
C. Transcription of messenger RNA (mRNA) for protein export.
D. Synthesis of ribosomal RNA (rRNA) and assembly of ribosome subunits.
Answer: D
Conceptual Explanation: The nucleolus is a dense region within the nucleus dedicated to
the synthesis of rRNA and the assembly of large and small ribosomal subunits.
2. A cell that specializes in the detoxification of drugs and the storage of calcium ions would
likely have an abundance of which organelle?
A. Smooth Endoplasmic Reticulum
B. Rough Endoplasmic Reticulum
C. Golgi Apparatus
,D. Lysosomes
Answer: A
Conceptual Explanation: The Smooth ER is responsible for lipid synthesis, detoxification
of toxins, and calcium ion storage, particularly in muscle cells (sarcoplasmic reticulum).
3. Which side of the Golgi apparatus is responsible for receiving vesicles arriving from the
Endoplasmic Reticulum?
A. The trans face
B. The cisternae face
C. The secretory face
D. The cis face
Answer: D
Conceptual Explanation: The cis face of the Golgi is the receiving side, typically located
near the ER, whereas the trans face is the shipping side.
4. What is the primary role of the enzyme Catalase found within peroxisomes?
A. Breaking down fatty acids into smaller molecules.
B. Synthesizing ATP through oxidative phosphorylation.
C. Digestive recycling of old organelles via autophagy.
D. Converting hydrogen peroxide into water and oxygen.
, Answer: D
Conceptual Explanation: Peroxisomes produce hydrogen peroxide as a byproduct of
metabolism; Catalase is essential to break down this toxic byproduct into water and
oxygen.
5. In the fluid mosaic model, what is the primary function of cholesterol within the animal cell
membrane?
A. To act as a transport channel for polar molecules.
B. To serve as a recognition site for cell-to-cell signaling.
C. To stabilize membrane fluidity at varying temperatures.
D. To provide structural support by anchoring to the cytoskeleton.
Answer: C
Conceptual Explanation: Cholesterol acts as a fluidity buffer, preventing the membrane
from becoming too rigid in the cold or too fluid in the heat.
6. Which of the following best describes the movement of molecules via ‘Facilitated
Diffusion’?
A. Movement against the concentration gradient requiring ATP.
B. Movement down the concentration gradient without the use of proteins.
C. Movement down the concentration gradient using specific transport proteins.
D. Bulk transport of large solids into the cell.
