BIO 123 Communication and homeostasis Mark Scheme A level_ocr_biology

1

Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/




Communication and
homeostasis
Mark Scheme

Level A Level
SubjectBiology
Exam Board OCR
TopicCommunication, homeostasis and energy
Sub-Topic Communication and homeostasis
BookletMark Scheme




Time Allowed: 53 minutes

Score: / 44

Percentage: /100




Grade Boundaries:

A* A B C D E U

>85% 77.5% 70% 62.5% 57.5% 45% <45%

, Quueesstti Answer Marks Guidance
on
1 (a) (i) 1 Mark the first answer. If the answer is correct and an
additional answer is given that is incorrect or
contradicts the correct answer then = 0 marks

(thermoregulatory centre in) hypothalamus ; ACCEPT hyperthalamus

1 (a) (ii) 1 Mark the first answer. If the answer is correct and an
additional answer is given that is incorrect or
contradicts the correct answer then = 0 marks

thermoreceptor / peripheral temperature receptor ; IGNORE ‘heat’ / ‘sensory cell’

1 (a) (iii) 1 Mark the first answer. If the answer is correct and an
additional answer is given that is incorrect or
contradicts the correct answer then = 0 marks

negative feedback / thermoregulation ; IGNORE homeostasis

1 (b) (i) 1 If the answer is correct and an additional letter is
given that is incorrect then = 0 marks

M and N and P ; All 3 correct letters required for one mark
IGNORE J

1 (b) (ii) 1 If the answer is correct and an additional letter is
given then
= 0 marks
K and O ;
Both correct letters required for one mark
1 (b) (iii) 1 Mark the first answer. If the answer is correct and
an additional letter is given that is incorrect then
= 0 marks
L;
ACCEPT J