TAMU BIOLOGY 112 LAB PRACTICAL 2 EXAM WITH CORRECT ACTUAL QUESTIONS AND CORRECTLY WELL DEFINED ANSWERS LATEST ALREADY GRADED A+

TAMU BIOLOGY 112 LAB PRACTICAL 2
EXAM WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+



TAMU BIOLOGY 112 – LAB PRACTICAL 2 EXAM
Questions 1–10: Microscopy & Cell Structure
1. Which part of a compound microscope controls the
amount of light reaching the specimen?


A. Ocular lens
B. Stage
C. Iris diaphragm
D. Coarse adjustment knob


Explanation:
The iris diaphragm regulates light intensity. Proper light
control improves contrast and resolution, which is critical
for observing specimens clearly.

,2. What is the total magnification when using a 10x ocular
and 40x objective lens?


A. 40x
B. 100x
C. 400x
D. 1000x


Explanation:
Total magnification = ocular × objective = 10 × 40 = 400x .


3. Which organelle is responsible for ATP production?


A. Nucleus
B. Mitochondria
C. Golgi apparatus
D. Lysosome


Explanation:

,The mitochondria generate ATP through cellular
respiration, making them the “powerhouse” of the cell.


4. What type of cell lacks a nucleus?


A. Eukaryotic
B. Plant
C. Animal
D. Prokaryotic


Explanation:
Prokaryotic cells (like bacteria) lack membrane-bound
organelles, including a nucleus.


5. Which structure provides support and protection in plant
cells?


A. Cell membrane
B. Cytoplasm
C. Cell wall
D. Vacuole

, Explanation:
The cell wall , made of cellulose, provides structural
support and protection.


6. Which organelle modifies and packages proteins?


A. Ribosome
B. Endoplasmic reticulum
C. Golgi apparatus
D. Nucleus


Explanation:
The Golgi apparatus modifies, sorts, and packages
proteins for transport.


7. What is the main function of ribosomes?


A. DNA storage
B. Lipid synthesis
C. Protein synthesis