Cell Structure Compared to Function
Mark scheme June 2002 GCE
Biology B Unit BYB4
Copyright © 2002 AQA and its licensors. All rights reserved.
The Assessment and Qualifications Alliance (AQA) is a company limited by guarantee registered in England and Wales 3644723 and a registered charity number 1073334 Registered address: Addleshaw Booth & Co., Sovereign House, PO Box 8, Sovereign Street, Leeds LS1 1HQ Kathleen Tattersall: Director General
klm
SECTION A
Question 1
(a)
GCE: Biology B – BYB4
June 2002
X = grana/lamellae/thylakoid (membranes); Y = stroma; NADPH2/ NADPH/ reduced NADP/reduced coenzyme; ATP; carbon dioxide/CO2; stroma; NOT “Y” production/breakdown of starch (or equivalent);
2
(b)
2 1 1 1
(c) (d) (i) (ii)
Total 7 __________________________________________________________________________________
Question 2
(a) Oryctolagus, Helix, Trichonympha; (reject if specific names included) (not insisting on generic capitals) any two for 1 mark Animals, Protoctists, Prokaryotes;; (accept Latin equivalents) any two for one mark, all three for both that (they are) fertile; 1
(b)
2 1
(c)
Total 4 __________________________________________________________________________________
klm
Question 3
(a)
GCE: Biology B – BYB4
June 2002
Mark across whole of two parts in (a) to credit the following possible points (structure) Distant object Close object
Cornea suspensory ligament Ciliary Body - in tension - relaxed;
- converges light/refracts/bends light; - tension relaxed; - contracts;
- pulled thin; Lens
- allowed to become fatter/more spherical;
- the more convex/fatter the lens, the shorter focal length (or converse) Each itemised point in a box (-) worth one mark. Any 6 from 8 points. (b) (i) (ii) (c) (d) only blue-(sensitive) cones/cells stimulated; (mixture of) green- and red(-sensitive) cones/cells stimulated; value or range 575 to 600(nm) (accept any range within 551 to 649 nm); there are two phases/sections to the curve (or
Biology B Unit BYB4
Copyright © 2002 AQA and its licensors. All rights reserved.
The Assessment and Qualifications Alliance (AQA) is a company limited by guarantee registered in England and Wales 3644723 and a registered charity number 1073334 Registered address: Addleshaw Booth & Co., Sovereign House, PO Box 8, Sovereign Street, Leeds LS1 1HQ Kathleen Tattersall: Director General
klm
SECTION A
Question 1
(a)
GCE: Biology B – BYB4
June 2002
X = grana/lamellae/thylakoid (membranes); Y = stroma; NADPH2/ NADPH/ reduced NADP/reduced coenzyme; ATP; carbon dioxide/CO2; stroma; NOT “Y” production/breakdown of starch (or equivalent);
2
(b)
2 1 1 1
(c) (d) (i) (ii)
Total 7 __________________________________________________________________________________
Question 2
(a) Oryctolagus, Helix, Trichonympha; (reject if specific names included) (not insisting on generic capitals) any two for 1 mark Animals, Protoctists, Prokaryotes;; (accept Latin equivalents) any two for one mark, all three for both that (they are) fertile; 1
(b)
2 1
(c)
Total 4 __________________________________________________________________________________
klm
Question 3
(a)
GCE: Biology B – BYB4
June 2002
Mark across whole of two parts in (a) to credit the following possible points (structure) Distant object Close object
Cornea suspensory ligament Ciliary Body - in tension - relaxed;
- converges light/refracts/bends light; - tension relaxed; - contracts;
- pulled thin; Lens
- allowed to become fatter/more spherical;
- the more convex/fatter the lens, the shorter focal length (or converse) Each itemised point in a box (-) worth one mark. Any 6 from 8 points. (b) (i) (ii) (c) (d) only blue-(sensitive) cones/cells stimulated; (mixture of) green- and red(-sensitive) cones/cells stimulated; value or range 575 to 600(nm) (accept any range within 551 to 649 nm); there are two phases/sections to the curve (or