I put carbohydrates and protein, heard some people put starch, glycogen, etc. Don't know what is right.

Found it good overall, but a couple of things:

2 marks decomposition of wood what is the answer? I put decomposing bacteria break it down into smaller, less stable, unattractive pieces and sections of wood for furniture. Think that is wrong as I heard someone put releasing enzymes and stuff like that.

Let me know, hope everyone did ok 👍🏿

Reply 4

Meebcphgrsfar

1

Also what is a good experiment to measure rate of sweating? 3 marks

Reply 5

Neymar27

OP

6

What did people put for the sweating question

Reply 6

Neymar27

OP

6

Original post by Meebcphgrsfar

I put carbohydrates and protein, heard some people put starch, glycogen, etc. Don't know what is right.

Found it good overall, but a couple of things:

2 marks decomposition of wood what is the answer? I put decomposing bacteria break it down into smaller, less stable, unattractive pieces and sections of wood for furniture. Think that is wrong as I heard someone put releasing enzymes and stuff like that.

Let me know, hope everyone did ok 👍🏿

I did that too,,, I reckon they would accept carbohydrates/starch and proteins

Reply 7

Foreboding

5

We need to set up an unofficial mark scheme. Can someone make the google doc like some people did in maths ?
Also, what did people put for the why do people sweat more when they do more exercise and the micro propagation question

Posted from TSR Mobile

Reply 8

Foreboding

5

Original post by Meebcphgrsfar

Also what is a good experiment to measure rate of sweating? 3 marks

I put something weird down like collecting the sweat in a measuring cylinder and measuring it in a set time. So like cm^3/minute or something

Posted from TSR Mobile

Reply 9

username1974931

10

For the swearing I said to use cotton pads and measure the mass increase

Reply 10

yupppp89

2

Original post by jenniisobel

For the swearing I said to use cotton pads and measure the mass increase

yeah i said that but i said divide by a set time?!?

Reply 11

username1974931

10

I thought that exam was quite hard because it didn't have many topics and the questions were less specific, and I forgot micropropagation and I also didn't say that transgenic was a different species I just said different organism :frown:

Reply 12

Neymar27

OP

6

Original post by Foreboding

We need to set up an unofficial mark scheme. Can someone make the google doc like some people did in maths ?
Also, what did people put for the why do people sweat more when they do more exercise and the micro propagation question

Posted from TSR Mobile

Micropropagation:

1. Tips of side shoots/stem removed from the plant (explants)
2. Sterilised to kill microorganisms
3. Grown in vitro (placed in Petri dish with nutrient medium) which provides growth hormones and
nutrients
4. Cells begin to divide into a small plant
5. To meet demand, more explants can be taken
6. Remove from dish, plant in soil, and place in glasshouse (with moist conditions)

Reply 13

yupppp89

2

Original post by Neymar27

Micropropagation:

1. Tips of side shoots/stem removed from the plant (explants)
2. Sterilised to kill microorganisms
3. Grown in vitro (placed in Petri dish with nutrient medium) which provides growth hormones and
nutrients
4. Cells begin to divide into a small plant
5. To meet demand, more explants can be taken
6. Remove from dish, plant in soil, and place in glasshouse (with moist conditions)

you need to say it was put in another hormone which encouraged root growth

Reply 14

Neymar27

OP

6

Original post by yupppp89

you need to say it was put in another hormone which encouraged root growth

I think that is additional,,, the main jist was the process of micro propagation for plants

Reply 15

Neymar27

OP

6

Original post by yupppp89

you need to say it was put in another hormone which encouraged root growth

And what did you put for the sweating 4 marker (not the sweating experiment)

Reply 16

Foreboding

5

Original post by Neymar27

Micropropagation:

1. Tips of side shoots/stem removed from the plant (explants)
2. Sterilised to kill microorganisms
3. Grown in vitro (placed in Petri dish with nutrient medium) which provides growth hormones and
nutrients
4. Cells begin to divide into a small plant
5. To meet demand, more explants can be taken
6. Remove from dish, plant in soil, and place in glasshouse (with moist conditions)

Yeah I said something slightly different but pretty much the same.
I said that explants were taken from the trees. They were placed in sterile agar jelly to prevent competition with other microbes. The agar has nutrients (glucose for respiration; nitrates for growth). The agar jelly has plant hormones to stimulate growth. The explant is taken out and put into another agar jelly with plant hormones to encourage root growth. Finally many explants can be taken from trees at any time of year. Do you think I'll hit most of the marks for that?

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Reply 17

yupppp89

2

Original post by Neymar27

And what did you put for the sweating 4 marker (not the sweating experiment)

I dunno if I got it right but i said

1. weigh a tissue
2. place the tissue where there are many sweat glands such as the armpit
3. wait for a set time
4. remove the tissue and way the mass again
5. find the mass difference and divide by time taken
this will give you rate of sweat/minute

Reply 18

Neymar27

OP

6

Original post by yupppp89

I dunno if I got it right but i said

1. weigh a tissue
2. place the tissue where there are many sweat glands such as the armpit
3. wait for a set time
4. remove the tissue and way the mass again
5. find the mass difference and divide by time taken
this will give you rate of sweat/minute

I put the same,,, but I meant the 4 marker at the top of the right page, why we sweat when exercising or something