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Which cellular structure is responsible for breaking down cellular waste and debris?
- A. Ribosome
- B. Nucleus
- C. Lysosome
- D. Golgi apparatus
Correct Answer: C
Rationale: Lysosomes contain enzymes that degrade waste materials and cellular debris.
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Find out incorrect sentence.
- A. Parenchymatous tissues have intercellular spaces.
- B. Collenchymatous tissues are irregularly thickened at corners.
- C. Apical and intercalary meristems are permanent tissues.
- D. Meristematic tissue, in its early stage, lacks vacuoles.
Correct Answer: C
Rationale: Apical and intercalary meristems are not permanent tissues but are meristematic tissues.
Which of the following term describe production of RBCs?
- A. Anabolism
- B. Catabolism
- C. Erythropoiesis
- D. Homeostasis
Correct Answer: C
Rationale: Erythropoiesis refers to the production of red blood cells (RBCs).
Compact bone consists of cylindrical units called
- A. trabeculae
- B. Haversian systems
- C. osteons
- D. Both B and C are correct
Correct Answer: C
Rationale: Osteons (or Haversian systems) are the cylindrical units of compact bone.
Which muscle tissue type is responsible for involuntary contractions of the digestive tract?
- A. Skeletal muscle
- B. Cardiac muscle
- C. Smooth muscle
- D. Striated muscle
Correct Answer: C
Rationale: Smooth muscle powers involuntary contractions in the digestive tract.
In the DNA molecule, the nitrogenous base adenine always pairs with:
- A. uracil
- B. thymine
- C. cytosine
- D. guanine
Correct Answer: B
Rationale: Adenine pairs with thymine in DNA via two hydrogen bonds.