MCAT Biology Questions and Answers |
Latest Update | 2024/2025 | Graded A+
What is the primary function of the rough endoplasmic reticulum in a cell?
The rough endoplasmic reticulum is involved in the synthesis and processing of proteins,
which are then transported to the Golgi apparatus.
...
How does the structure of a phospholipid contribute to the formation of cellular membranes?
✔✔Phospholipids have hydrophilic heads and hydrophobic tails, forming a bilayer that creates
the semi-permeable membrane of cells.
What is the function of the sodium-potassium pump in maintaining cellular function?
3
, ✔✔The sodium-potassium pump maintains the concentration gradients of sodium and potassium
ions across the cell membrane, crucial for cellular function and volume regulation.
Describe the process of translation and its location in the cell.
✔✔Translation is the process where ribosomes synthesize proteins based on the sequence of
mRNA, occurring in the cytoplasm.
What role do peroxisomes play in cellular metabolism?
✔✔Peroxisomes are involved in the breakdown of fatty acids and the detoxification of harmful
substances by producing and degrading hydrogen peroxide.
Explain the function of the pituitary gland in hormone regulation.
✔✔The pituitary gland releases hormones that regulate various bodily functions by signaling
other endocrine glands to produce hormones.
How do cellular signals lead to changes in gene expression?
4
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