OCR Gateway Science B1,C1,P1 May 25th 2016

What did everyone write for the insulation question the one that asked whether the person should spend £55 or get the wall insulation

unofficial biology section mark scheme-
not entirely sure all correct

1. Diabetes [ 7 ]
a} in the blood/blood stream
b) carbs increase sugar in blood - insulin injection helps to lower this level
c) stored in liver as insoluble glycogen
d) ff - no cystic fibrosis ff - none but is a carrier. Ff - has cystic fibrosis.

2. Alcohol [ 4 ]
a) 7 units
b) is a depressent - blocks receptors so neurotransmitters cant get through

3) immunity [6]
6marker polio. Inject with pathogen. Antibodies fight it / memory cells created. Active & passive immunity. Data anlysis (from graph)

4) neurone [5]
a) relay neurone / effector
b) cell body
c) damage to myelin sheath / insulating sheath - axon transmitting messages not protected - slows in pace of transmission & could not be delivered at all.

Im missing 3marks - should i do the oher 2 sections? If you disagree or remember other questions tell me

b is dendrites yess do other sections

I swear dentrites are inly one tiny part that was in that section if the neaurone? In really not sure what the answer was

Unofficial mark scheme - chemistry section

1) alkanes etc [5]
A) no double bond
B) has an oxgen atom - not only hydrogen & carbon
C) c2h6o
D) think it was the drawing which was fairly simple.

2) carbon monoxide [3]
2c4h10 + 13o2 -> 10h2o + 8co2
B) carbon dioxide

3) crude oil [6]
A) finite = not infinite - will run out. Non-renewable = used up quicker than its being produced.
B) crack it into more useful ones like petrol to meet demands.
C) oil slicks created / damage ti beaches & birds / co2 released / detergents create damage.

4) coal or methane? [6]
Ads coal - cheaper / very available / solid (burning)
Disads coal - less energy released / lots of carbon dioxide made
Ads methane - available / lots of energy / not as much co2 made
Disads methane - more expensive / still makes co2 / gas (burning)
Overall - pick & justify

5) esters [3]
A) cant remember if there was a question here?
B) evaporate - weak intermolecular forces / high energy / spread out

Again missing 2marks. Any disagreements / you remeber what ive missed comment

Unofficial mark scheme - chemistry section

1) alkanes etc [5]
A) no double bond
B) has an oxgen atom - not only hydrogen & carbon
C) c2h6o
D) think it was the drawing which was fairly simple.

2) carbon monoxide [3]
2c4h10 + 13o2 -> 10h2o + 8co2
B) carbon dioxide

3) crude oil [6]
A) finite = not infinite - will run out. Non-renewable = used up quicker than its being produced.
B) crack it into more useful ones like petrol to meet demands.
C) oil slicks created / damage ti beaches & birds / co2 released / detergents create damage.

4) coal or methane? [6]
Ads coal - cheaper / very available / solid (burning)
Disads coal - less energy released / lots of carbon dioxide made
Ads methane - available / lots of energy / not as much co2 made
Disads methane - more expensive / still makes co2 / gas (burning)
Overall - pick & justify

5) esters [3]
A) cant remember if there was a question here?
B) evaporate - weak intermolecular forces / high energy / spread out

Again missing 2marks. Any disagreements / you remeber what ive missed comment

Unofficial mark scheme - chemistry section

1) alkanes etc [5]
A) no double bond
B) has an oxgen atom - not only hydrogen & carbon
C) c2h6o
D) think it was the drawing which was fairly simple.

2) carbon monoxide [3]
2c4h10 + 13o2 -> 10h2o + 8co2
B) carbon dioxide

3) crude oil [6]
A) finite = not infinite - will run out. Non-renewable = used up quicker than its being produced.
B) crack it into more useful ones like petrol to meet demands.
C) oil slicks created / damage ti beaches & birds / co2 released / detergents create damage.

4) coal or methane? [6]
Ads coal - cheaper / very available / solid (burning)
Disads coal - less energy released / lots of carbon dioxide made
Ads methane - available / lots of energy / not as much co2 made
Disads methane - more expensive / still makes co2 / gas (burning)
Overall - pick & justify

5) esters [3]
A) cant remember if there was a question here?
B) evaporate - weak intermolecular forces / high energy / spread out

Again missing 2marks. Any disagreements / you remeber what ive missed comment

For the neurons, was it relay and then response (I heard effector)?

3C) Talking about environment, not bird feathers
5A) Insoluble to Water --- Can Not Be Washed Off Easily
Does Not React With Water - So It Does Not React With Perspiration
I believe the other one was Does Not Irritate the Skin -- Perfume Can Be Sprayed Onto Body