Which organelle is found in eukaryotic cells and is responsible for controlled enzymatic degradation of intracellular substances?
a. Mitochondria
b. Lysosomes
c. Endoplasmic reticulum
d. Golgi body
B
Lysosomes in the cell are responsible for controlled degradation of intracellular substances.
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When a mixture of debris from killed virulent bacteria and living non-virulent bacteria are injected into mice:
A. the mice are killed because the virulent bacteria are revived. B. the mice survive because none of the living bacteria are virulent. C. the mice survive for a period of a few weeks and then die from an unrelated illness. D. half the mice are killed and the other half survive. E. the mice are killed because the non- virulent bacteria are transformed into virulent bacteria.
Melatonin is secreted by
a. pancreatic islet cells. b. the thyroid gland. c. the pituitary gland. d. the pineal gland. e. the kidneys.
Parathyroid hormone causes the blood calcium level to rise, but calcitonin causes those levels to fall. The relationship between the two hormones is described as ________
A) expressive B) antagonistic C) synergistic D) permissive
A (bacteriocidial/bacteriostatic/minimum) concentration of a drug is one at which microbes survive but are not able to grow and reproduce
What will be an ideal response?