Cell Transport

In the simulation we did on DE a sealed bag containing starch solution was placed into a beaker containing iodine. the bag is semi-permeable and only the iodine will pass through because the starch molecules are too big. Which statement correctly identifies what will happen?

• Iodine will move in and starch will move out of the bag.

• Iodine will move into the bag.

• Starch will move out of the bag.

• There will be no movement of iodine nor starch.

Which of the following describes the way substances diffuse, by osmosis, in and out of a cell?

• Substances move from greater to lesser concentration.

• Substances move from lesser to greater concentration.

• Substances move back and forth across the membrane equally.

• Substances move across the membrane when energy is available.

Tags

NGSS.MS-LS2-3

When a plant cell is placed into pure water, water molecules move into the cell. When a plant cell is placed in salt water, It loses water to the surrounding solution. Why does this happen?

• the water molecules are moving from an area of low concentration to an area of high concentration.

• Water molecules diffuse from areas of high concentration to areas of low concentration.

• The movement of water is associated with the temperature of the water.

• The salt eats away at the cell membrane and causes it to collapse.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5

If a cucumber slice is placed into pure water, will the water move into or out of the cucumber cells?

• out of the cucumber cells

• into the cucumber cells

• water will move in and out equally.

• water will not move at all.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS2-3

What is the main difference between passive transport and active transport?

• Passive transport moves molecules from a low to high concentration, while active transport moves them from high to low concentration.

• Active transport requires cellular energy, while passive transport does not.

• Passive transport can only move water molecules, while active transport can move any type of molecules.

• Active transport uses vesicles, while passive transport uses the cell membrane.

What is the primary function of the cell membrane?

• To provide structural support to the cell.

• To control what enters and leaves the cell, maintaining homeostasis.

• To facilitate the synthesis of proteins.

• To store the cell's genetic information.

Tags

NGSS.MS-LS1-2

​ ​ (a)   does NOT require energy.

• passive transport

• active transport

• endocystosis

• exocytocisi

Tags

NGSS.MS-LS2-3

What is passive transport?

• The movement of molecules across the cell membrane without the use of energy by the cell.

• The movement of molecules across the cell membrane using energy.

• The process of taking material into the cell by means of infoldings, or pockets, of the cell membrane.

• The release of materials from the cell.

Examples of this would be diffusion, (41)​ (a)   (the diffusion of water), and facilitated diffusion. Active transport requires

the use of energy because it is the movement of molecules from a (42)​ (b)   to

(43)​ (c)   concentration (or (44)​ (d)   the concentration gradient).

• Osmosis

• Active Transport

• endocytosis

• exocytosis

• low

• high

• against

Answer explanation

Osmosis is the correct choice as it refers to the diffusion of water. 'Low' and 'high' are accurate for the blanks 39 and 40 respectively, indicating movement against the concentration gradient.

When a plant cell is placed in water, the plant cell will swell and become larger. What cell process is responsible for the movement of water into the cell?

• cellular respiration

• active transport

• translation

• osmosis

Tags

NGSS.MS-LS1-2