HELP WITH BIO!!!! PLZ try to answer!?

Question

I have a few questions please answer which ones you know. if you know why can you plz give me a really short reason why (if u don't want to, thats fine, i just need public opinion.) THANK YOU THANK YOU THANK YOU!

1)Memebranes in cells help chemical reactions to occur by:
a)keeping enzymes apart from substrates
b)reducing the energy of activation
c)anchoring enzymes in position for effecient reactions
d) adding lipids to the products
e) b and c

2)If a 2n cell with 16 chromosomes undergoes mitosis, how many chromosomes will each daughter cell have?
a)4
b)8
c)16
d)32
e)64

3)Mechanical Digestion of food is accomplished in humans by:
a)teeth
b)small intestine
c)stomach
d)choices a and c
e)choices a, b, and c

Thanks so, so much- it means the world!!! best answer will be chosen by accuracy, quickness, and explanitory answer :) thanks again =D

Answer 1

1. Reducing the energy of activation is a definition of how an enzyme works, and there are membrane bound enzymes so I would answer both B and C.
2. In mitosis the daughter cell is identical genetically to the parent cell so the number of chromosomes will be the same in this case 2n 16.
3. Mechanical digestion is accomplished by teeth and the mixing motions of the gut. So a,b,c would be correct.

Answer 2

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Answer 3

1) I think it's e, but it's just a guess
2) C - mitosis gives identical daughter cells
3) A - the stomach and small intestine are chemical digestion

Answer 4

1) e (i think)
2) c-16
3) d-the teeth grind and the stomach churns

Answer 5

I agree with MHnurseC

Answer 6

2 is c...
for sure....maybe
3 my guess is a....like 70 %
1 is e i think...

Answer 7

3-d
1-a (i think)