Nokea
What consists of one or more cells that produce and secrete a product?
- A. gland
- B. epithelium
- C. desmosome
- D. chromosome
Correct Answer: A
Rationale: Glands are specialized cells or groups secreting products (e.g., hormones, mucus).
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Meristematic tissues in plants are
- A. localized and permanent
- B. not limited to certain regions
- C. localized and dividing cells
- D. growing in volume
Correct Answer: C
Rationale: Meristematic tissues are group of living cells which are present in the plant body and divide to form new cells.
Enzymes allow reactions to occur at normal body temperatures by:
- A. decreasing pH
- B. increasing pH
- C. decreasing energy of activation
- D. increasing energy of activation
Correct Answer: C
Rationale: Enzymes lower the activation energy, speeding reactions at physiological temperatures.
Which of the following cells is found in the cartilaginous tissue of the body?
- A. Mast cells
- B. Basophils
- C. Osteocytes
- D. Chondrocytes
Correct Answer: D
Rationale: Chondrocytes are the cells in the cartilaginous tissue which maintain cartilaginous matrix.
Upon completion of DNA replication, the new molecule of DNA consists of:
- A. two new strands of DNA
- B. two old strands of DNA
- C. one old strand and one new strand of DNA
Correct Answer: C
Rationale: DNA replication is semi-conservative, with each new molecule having one old and one new strand.
Which vessel is not an end artery?
- A. renal artery
- B. retinal artery
- C. pulmonary artery
- D. intercostal artery
Correct Answer: D
Rationale: Intercostal arteries are not end arteries as they anastomose.