Osmosis Diffusion Lab

Between starch, glucose, water, and starch indicator, which could NOT pass through an artificial membrane in our lab, because its particles were too big?

• starch
• glucose
• water
• starch indicator

These onion cells have lost water from their cytoplasm after a certain procedure has been performed. What has caused the change?

• diffusion
• active transport
• photosynthesis
• cellular respiration

Tags

NGSS.MS-LS1-2

When was this viewed?

• After distilled (pure) water was added.
• After salt water was added

Tags

NGSS.MS-PS1-2

When was this viewed?

• After distilled (pure) water was added
• after salt water was added

Tags

NGSS.MS-PS1-2

At this stage of the experiment, have either starch or starch indicator passed (noticeably) though the dialysis tubing?

• yes, both
• yes, starch only
• yes, starch indicator only
• no

what does the amber coloring of the fluid indicate?

• glucose has passed through membrane
• starch has passed through membrane
• it proves NO glucose passed through membrane
• it proves NO starch has passed through membrane

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What does the blue black coloring inside the artificial cell indicate?

• starch indicator passed through dialysis membrane
• glucose indicator passed through dialysis membrane
• glucose had a chemical reaction with starch
• someone spilled ink in their "cell"

Tags

NGSS.MS-PS1-2

This procedure proves glucose passed through the dialysis membrane. What was in that test tube?

• glucose indicator, fluid from outside the "cell"
• glucose indicator, sample from inside "cell"
• starch indicator, fluid from outside the "cell"
• starch indicator, sample from inside the "cell"

Tags

NGSS.MS-PS1-2

.

• there will be a color change inside the "cell" AND in its environment
• there will be a color change inside the "cell" but NOT in its environment
• No color change in the cell or its environment

When you are viewing some onion cells under the microscope, and you add salt water to observe changes, and later add distilled (pure) water and observe further changes, what do you see?

• whole cell (cell wall, cell membrane, cytoplasm) shrinks and expands
• cell wall remains unchanged, cell membrane and cytoplasm change in response to diffusion
• cell membrane remains unchanged, cell wall and cytoplasm change in response to diffusion

Tags

NGSS.MS-LS1-2