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Which of the following is a connective tissue?
- A. pancreas
- B. spinal cord
- C. muscle
- D. blood
Correct Answer: D
Rationale: Blood contains cells separated by a liquid matrix. Choices A& B are epithelial and nervous tissues.
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Skeletal muscle is composed of very hard working cells. Which organelles do you expect to find in abundance in skeletal muscle cell?
- A. nuclei
- B. striations
- C. golgi bodies
- D. mitochondria
Correct Answer: D
Rationale: Mitochondria are abundant in skeletal muscle cells to provide energy (ATP) for their high metabolic demands.
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.
Which of the following is NOT a function of proteins?
- A. forming hormones
- B. forming monosaccharides
- C. forming transport molecules
- D. forming hair and nails
Correct Answer: B
Rationale: Proteins don't form monosaccharides (carbohydrates); they serve structural and functional roles.
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 structure is responsible for organizing microtubules and assisting in cell division?
- A. Centriole
- B. Nucleus
- C. Ribosome
- D. Peroxisome
Correct Answer: A
Rationale: Centrioles organize the spindle fibers for cell division.