1. The proteins of bacteria were radioactively labeled and fed to human immune cells. The proteins within the cell became increasingly more radioactive over time. This observation is the result of the activity of:
a. mitochondria. b. lysosomes. c. the Golgi apparatus. d. peroxisomes.
2. We know that different tissues in the body contain different cells. This cellular specialization is also accompanied by organelle-specific specialization causing different organelles to be abundant in cells specialized for certain roles. Knowing what you know about the organelle function, which organelles would you predict to be over-represented in the following cell-types?
Osteoclasts involved in degradation of bone tissue. a. Mitochondria b. Lysozomes c. Smooth ER d. Rough ER
Ceruminous cells that secrete ear wax into the ear canal. a. Mitochondria b. Lysozomes c. Smooth ER d. Rough ER
Anterior pituitary glands involved in secretion of peptide hormones a. Mitochondria b. Lysozomes c. Smooth ER d. Rough ER
1. The proteins of bacteria were radioactively labeled and fed to human immune cells. The proteins within the cell became increasingly more radioactive over time. This observation is the result of the activity of:
a. mitochondria. b. lysosomes. c. the Golgi apparatus. d. peroxisomes.
2. We know that different tissues in the body contain different cells. This cellular specialization is also accompanied by organelle-specific specialization causing different organelles to be abundant in cells specialized for certain roles. Knowing what you know about the organelle function, which organelles would you predict to be over-represented in the following cell-types?
Osteoclasts involved in degradation of bone tissue. a. Mitochondria b. Lysozomes c. Smooth ER d. Rough ER
Ceruminous cells that secrete ear wax into the ear canal. a. Mitochondria b. Lysozomes c. Smooth ER d. Rough ER
Anterior pituitary glands involved in secretion of peptide hormones a. Mitochondria b. Lysozomes c. Smooth ER d. Rough ER
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Pancreatic beta cells secrete the hormone insulin to regulate blood glucose levels. Which of the following organelles are beta cells most likely to have in abundance and why?
a. | Mitochondria â because insulin is also used to synthesize ATP | |
b. | Peroxisomes â because excess insulin must be recycled to avoid toxic levels | |
c. | Smooth ER â because insulin is a steroid hormone like testosterone | |
d. | Centrosomes â because extra microtubules are needed for insulin transport | |
e. | Plasmodesmata â because insulin is secreted through plasmodesmata in the cell membrane. | |
f. | Rough ER â because insulin is a secreted protein synthesized by bound ribosomes |