A bag made of a selectively permeable membrane that only allows water molecules

Question

A bag made of a selectively permeable membrane that only allows water molecules through its pores was filled with a 30% sucrose solution and sealed. The bag was placed in a beaker containing pure (100%) water. After 20 minutes, what would be the condition of the bag? Select one: a. The bag would swell b. The bag would shrink c. The bag would remain unchanged d. The sucrose would leave the bag e. There is no way to predict what would happen to the bag with this information Cells are considered the basic unit of all living organisms. What does this statement imply about cells? Select one: a. cells must respond to stimuli b. cells must grow and reproduce c. cells must acquire nutrients and energy from their surroundings d. cells must die e. All of the above Consider the structure of cell membranes. Which part of the membrane is the fluid portion? Select one: a. Carbohydrates b. Proteins c. DNA d. Phospholipids e. The membrane is not fluid but instead solid Herbicides contain high concentrations of salt. Which statement most accurately explains the effect of herbicides on plants? Select one: a. Causes water to move into plant cells and rupture them b. Causes water to move out of plant eels and dehydrates them c. Creates a hypertonic environment inside the cells of the plant d. Disrupts plants' nervous system In lab you demonstrated a form of passive transport called osmosis when you placed a stick of celery in regular tap water. Recall how the celery became more crisp or firm after sitting in tap water for the duration of the lab. Based on these results, which solution was hypertonic? Select one: a. The cells in the celery b. The tap water outside the celery c. Neither- they were both isotonic d. The air surrounding the beaker e. B and D

Explanation / Answer

1. The answer is
a. The bag would swell
because of osmosis. As the beaker have 100% pure water, water moves from low concentration to higher concentration (bag with 30% sucrose) through membrane.

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