Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International GCSE (9–1)
Monday 10 June 2024
Afternoon (Time: 1 hour 45 minutes) Paper
reference 4HB1/02R
Human Biology
UNIT: 4HB1
PAPER: 02R
You must have: Total Marks
Calculator, ruler
Instructions
•• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
• Show all the steps in any calculations and state the units.
Information
•• The total mark for this paper is 90.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end.
Turn over
P74495A
©2024 Pearson Education Ltd.
F:1/1/1/1/
*P74495A0128*
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 (a) The diagrams show the arrangement of teeth in a young child and the
arrangement of teeth in an adult.
child adult
X
Y
X
upper jaw Z
Z
DO NOT WRITE IN THIS AREA
lower jaw
(Source: https://www.medicalnewstoday.com/articles/326754#number-of-teeth)
(i) Name the types of teeth shown by X and Z.
(2)
X . . . . . .. .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............... ................. ........................................................................................................................... . . . . . . . . . . . . . . . . . . . .
Z
DO NOT WRITE IN THIS AREA
. . . . . .. .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............... ................. ........................................................................................................................... . . . . . . . . . . . . . . . . . . . .
(ii) State the function of the tooth labelled Y.
(1)
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............... ............................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............... ............................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . .
2
*P74495A0228*
, (b) Digestion of food begins in the mouth.
Use the most appropriate words or numbers to complete the passage about
DO NOT WRITE IN THIS AREA
digestion of food in the mouth.
(4)
Saliva in the mouth contains an enzyme called ............................................................................................. .
This enzyme speeds up the digestion of starch to produce
. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............ .
The enzyme in saliva works best at pH ............................................................................................. .
If the pH in the mouth was too low or too high, the digestion of carbohydrates
would . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ................. ............... .
DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA
3
*P74495A0328* Turn over
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International GCSE (9–1)
Monday 10 June 2024
Afternoon (Time: 1 hour 45 minutes) Paper
reference 4HB1/02R
Human Biology
UNIT: 4HB1
PAPER: 02R
You must have: Total Marks
Calculator, ruler
Instructions
•• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
• Show all the steps in any calculations and state the units.
Information
•• The total mark for this paper is 90.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end.
Turn over
P74495A
©2024 Pearson Education Ltd.
F:1/1/1/1/
*P74495A0128*
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 (a) The diagrams show the arrangement of teeth in a young child and the
arrangement of teeth in an adult.
child adult
X
Y
X
upper jaw Z
Z
DO NOT WRITE IN THIS AREA
lower jaw
(Source: https://www.medicalnewstoday.com/articles/326754#number-of-teeth)
(i) Name the types of teeth shown by X and Z.
(2)
X . . . . . .. .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............... ................. ........................................................................................................................... . . . . . . . . . . . . . . . . . . . .
Z
DO NOT WRITE IN THIS AREA
. . . . . .. .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............... ................. ........................................................................................................................... . . . . . . . . . . . . . . . . . . . .
(ii) State the function of the tooth labelled Y.
(1)
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............... ............................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............... ............................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . .
2
*P74495A0228*
, (b) Digestion of food begins in the mouth.
Use the most appropriate words or numbers to complete the passage about
DO NOT WRITE IN THIS AREA
digestion of food in the mouth.
(4)
Saliva in the mouth contains an enzyme called ............................................................................................. .
This enzyme speeds up the digestion of starch to produce
. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............ .
The enzyme in saliva works best at pH ............................................................................................. .
If the pH in the mouth was too low or too high, the digestion of carbohydrates
would . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ................. ............... .
DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA
3
*P74495A0328* Turn over
