please i need help with this qustions for my homework answer the multiple choice

Question

please i need help with this qustions for my homework answer the multiple choice that is all and be clear not writes un clear stuff just asnswer the qustions please also be correct becaus i need the right answer for my homwork so please help

Question 1

One of the scientific lab objectives is to

Question 2

Once you have placed a dialysis bag containing deionized water into the beaker of water that is 2% sodium chloride and 5% glucose, after 30 mins you notice that the water in the bag is slightly salty but not sweet at all. The beaker solution tasted both salty and sweet however. The best explanation of this is.....

Question 3

Why is it difficult for you to investigate the movement of water into and out of cells? The answer to this question is explicitly stated in your lab manual. Don't google the answer, but read the lab manual unit and think about what we've discussed in lab so far.  

Question 4

Sometimes its useful to use a model system, something that behaves like a normal cell, to investigate osmosis. Which of the following will be used as a cell mimic in this lab?

Question 5

What is the name of the protein channels in a cell membrane that allow water to move into and out of the cell? Write one word ONLY as your answer, no commas or periods. It must be spelled correctly.

Question 6

The diffusion of water across a selectively permeable membrane is called what? Write ONE word ONLY as your answer. No periods or commas. It must be spelled correctly.

Question 7

How will you measure the amount of water movement into or out of your artificial cells?

Question 8

What plant tissue will you use to observe the effects of water movement into and out of cells?

Question 9

Why do you use the wicking technique?

Question 10

If adding a 2% sodium chloride solution to a dialysis tubing bag and then placing the bag in deionized water for 30 mins causes the bag to increase in mass, what is the most likely explanation?

Explanation / Answer

Answer:

1. Investigate factors that affect the movement of water across cell membranes and design experiments to study the movement of water in and out of cells

2.  Sodium and chloride can cross the dialysis membrane but glucose can't.

3.  You can't directly observe the movement of water only the result of water movement.

4.  de-shelled egg

5. Aquaporins

6. Osmosis

7. Measure their volume change

8. Grapes

9. To help the cells absorb water

10. Water moved into the bag

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.