Question

Which of these is NOT found in a typical cell membrane?
Answer

proteins

carbohydrates

lipids

nucleic acids

* Nucleic Acids

Answer 1

@LoverofWords hihi....please help me...bestie :)

Answer 2

The hydrophobic part of a cell membrane is on the inside of the phospholipid bilayer.
Answer True False

*True

Answer 3

The diffusion of water across a semi-permeable membrane is called:
Answer

active transport

exocytosis

osmosis

pinocytosis

*Osmosis

Answer 4

Of the following choices, which would require the cell to expend energy to move it across the membrane?
Answer

water

oxygen

carbon dioxide

protein

*protein

Answer 5

Potatoes, like most cells, are composed of approximately 99% water. When freshly peeled potatoes are placed into a bowl of pure water, what will happen to the potatoes?
Answer

they will shrink due to water leaving the potato

they will have no change since the amounts of water entering the potatoes will balance the amounts of water leaving the potatoes

the potatoes will absorb some of the water and become firmer

the potato cells will absorb a great deal of water and burst

*the potatoes will absorb some of the water and become firmer

Answer 6

You're right for first three, let me check these before you post any more.

For the second one, it's the amino acid sequence within the phospholipid bylayer that causes it to be hydrophobic.

Answer 7

Which of the following terms describes a solution with a higher concentration of dissolved substances relative to another solution?
Answer

hypertonic

hypotonic

isotonic

polytonic

*Hypertonic

Answer 8

Wait wait...I am lost..haha..so, number 4 is incorrect right? What should the answers will be?

Answer 9

You're right for all of them. I'm making sure for the last one, but I'm 95% sure you're right on that, too :)

Answer 10

Right for all :)

Answer 11

Ok...so we finish with this. Are you ready for the next "challenge" my friend? :) I'm copying you using a smiley face.

Answer 12

The structure that keeps a Paramecium living in fresh water from swelling and bursting is called a:
Answer

mitochondrion

contractile vacuole

lysosome

ribosome

*Contractile Vacuole

Answer 13

Yeah, is there much more after that? I have school and an 8 hour shift at work tomorrow, so I need to go to bed soon :p lol

Answer 14

You're right :)

Answer 15

Oops....I'm sorry. Yes there's much much more. But that's ok we will see each other tmr. Sleep tight. Have a sweet dreams (about us...:) haha jk) Take care my friend. Health is a priority things.

Answer 16

Btw, thank you for spending your precious times answering my "silly" questions. Thank you thank you

Answer 17

I can finish this round first, because I will have a load of hw tomorrow, too lol

Answer 18

So let's finish this round, then I'll go :))))

Answer 19

Aww...I'm so touch.. Ok.. let's get back to work.

Answer 20

and no worries! :)

Answer 21

Diffusion is:
Answer

movement of materials from low to high concentration

movement of materials from high to low concentration

equal movement in all directions

no movement at all

*movement of materials from high to low concentration

Answer 22

hihi...thanks

Answer 23

The energy to conduct active transport comes from:
Answer

ATP

lysosomes

the sodium-potassium pump

the free energy of the system

*ATP

Answer 24

Right for both

Answer 25

Which of the following is an example of active transport?
Answer

osmosis of water across the cell membrane

transport of glucose into a cell

the sodium-potassium pump found in nerve cells

none of the above

*the sodium-potassium pump found in nerve cells

Answer 26

Proteins in cell membranes cannot facilitate the transport of materials through the cell membrane.
Answer True False

*Sorry, I don't know this one.

Answer 27

The process in which a cell membrane bulges inward and pinches off to form a vesicle is called:
Answer

crenation

endocytosis

exocytosis

lysis

*endocytosis

Answer 28

Another term for secretion is:
Answer

endocytosis

exocytosis

phagocytosis

pinocytosis

*Exocytosis

Answer 29

Sodium-potassium is right. Hold the questions until I finish answering these two please :)

Answer 30

oops...sorry...I will waiting :)

Answer 31

Okay, so for the one you don't know. Cell membranes have selective permeability. This means they can keep necessary materials in. Also, they can let certain ions in without letting nutrients out or other bad things in. This is active transport, and it is protein that facilitates this. Therefore, the answer is false. Make sense? :)

Answer 32

Other two are right :)

Answer 33

Yes yes, true true true... Thank you for your thoughtful response. I totally understand it

Answer 34

ahhhhh....you know what happen again.?

Answer 35

I am CORRECT...yaymee

Answer 36

@LoverofWords

Answer 37

Good job :). Okay, you can write another question now

Answer 38

Yay... this is a big presents for you before going to sleep, right?

Answer 39

This challenge is over! You are a winner

Answer 40

Congrats...!!! Sweet dreams

Answer 41

Oh lol. hooray! Yes, that's a reward! So you got 100%? That was all you, not me at all! GOod job, and goodnight! :)

Answer 42

yesh yesh, 100% so happy

Answer 43

Goodnight! I will miss our little talk today. Oh well. ByeBye

Answer 44

So when you can online to open study.com. I will check often so I can see you and ask for your help again, OK?

Answer 45

Oh, and tomorrow for questions, just tag me even if I'm offline. Just post one question, tag me in the thread, and I'll reply whenever I get on. probably won't be until late after 10 pm central time.

Answer 46

you are really good at Biology. I think you will be a Scientist in the future, don't you think?

Answer 47

Thanks for your willing to answers for me