1) A person working in your lab creates a synthetic semi-fluid like substance em
ID: 203652 • Letter: 1
Question
1) A person working in your lab creates a synthetic semi-fluid like substance embedded with proteins that transport nutrients and ions. This leads you to believe the substance is most similar to
Multiple Choice
rough ER.
cell membranes.
cytoplasm.
smooth ER.
mitochondrial matrix.
2)
Which of the following molecules are most likely to pass through the membrane by facilitated diffusion?
Multiple Choice
CO2 and H2O
H2O and O2
CO2 and O2
H2O and sucrose
3)Osmosis is best defined as the movement of
Multiple Choice
molecules from an area of low concentration to an area of higher concentration.
water molecules across a membrane from an area of low water to an area of higher concentration.
molecules from an area of high concentration to an area of lower concentration.
water molecules across a membrane from an area of high water concentration to an area of lower concentration.
Explanation / Answer
Answer:
1). Cytoplasm
Explanation: The cytoplasm comprises cytosol, the gel-like substance enclosed within the cell membrane, the organelles & the cell's internal sub-structures.
2). H2O and sucrose
Explanation:
Large molecules do not diffuse freely through cell membrane as it is semipermiable. Hence, they are transported by a process called facilitated diffusion.
3). Water molecules across a membrane from an area of high water concentration to an area of lower concentration.
Explanation: Osmosis describes about the movement of water from its higher concentration (Low solute) to a region of its lower concentration (high solute) through semipermiable membrane.
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